ANNALES HISTORICO-NATURALES MUSEI NATION ALI S HUNGARIC1 Tomus 78. Budapest, 1986 p. 79-82.

New Stiliderus Motschulsky species from the Indo-Ausíralian Region

(Coleoptera, Staphylinidae)*

by G . M . D E R O U G E M O N T , L o n d o n

Abstract— A list is given o f material studied, including new records. The aedeagus of S. kiloloensis ( L A S T ) is figured for the first t ime; S. loksai sp. n. . S. wauensis sp. n . , S. maritimus sp. n . and 5. madangensis sp. n. are described, and a plate o f figures is given o f the aedeagi o f the nine species now known belonging to the New Guinea hieroglyphicus group. W i t h 10 figures.

T h a n k s t o the kindness o f D R . O . M E R K L I have been able t o examine m a t e r i a l o f the genus Stiliderus (sensu l a t o : B L A C K W E L D E R 1939, & R O U G E M O N T ) i n the col lec t ions o f the H u n g a r i a n N a t u r a l H i s t o r y M u s e u m . T h e study has revealed three new species, a n d a f o u r t h was p r o v i d e d by m y f r i end M R . H . L A S T , w h o recognised i t ' s o r i g i n a l i t y a n d i n v i t e d m e t o describe i t . I a m gra te fu l t o b o t h these colleagues, as also t o the staff o f the B r i t i s h M u s e u m , N a t u r a l H i s t o r y , f o r a l l o w i n g frequent access t o the col lec t ions .

S Y S T E M A T I C S

Stiliderus kiloloensis ( L A S T )

Stilicoderus kiloloensis L A S T , 1984, Annls hist.-nat. Mus. natn. hung. 76: 137. 1 was unaware of the existence of this species which was described after the final draft o f the

manuscript o f my revision, part 1. I n accordance wi th the criteria used in my revision & key, a short supplement to the author's description and a figure of the aedeagus are given below.

The th i rd known member o f the funebris group, to which i t runs at the beginning o f my key. I t differs f rom bo th the other species, S. funebris L A S T and S. nubilus L A S T at first sight by the b i -colorous elytra and indistinctly paler terminal segments o f the abdomen. I t differs furthermore by the slightly asperate micro-puncturation o f the elytra (simple in the other two species). The median tooth of the labrum is equal in length but stouter than the lateral pair. The aedeagus is characteristic, bu t typical i n structure, of the group, w i th a very large wish-bone shaped dorsal plate o f the median lobe.

Proportions o f holotype: length: ca. 9.5 m m . ; length o f head: 128; breadth o f head: 130; length o f antennae: 268; length o f p ronotum: 132; breadth of p rono tum: 125; length o f elytra: 146; breadth o f elytra: 150.

Stiliderus aerosus ( L A S T )

Stilicoderus aerosus L A S T , 1984, Fo l . ent. hung. 45 (2): 114. Stiliderus aerosus: R O U G E M O N (1986) Ent. A b h . Mus . Tierk. Dresden 49 (8): 154.

2 cfcf & 1 $ : New Guinea / N E , Wau, M c A d a m Park I X . 1968 / no. N G - W - B 38 / leg. D r . J.. Balogh; 1 9 : New Guinea / N E , Wau 22. I X . - 3 0 . I X . 1969 / N o . N G W - R 9 : leg. D r . J . Balogh.

These exx. agree wi th the S. aerosus holotype which I have seen, including the long recumbent pubescence and the aedeagus, but lack the aeneous lustre of the fore-body. The new material comes f rom a locality far to the SE o f that o f the holotype material.

* 22nd contribution to the knowledge of Staphylinidae.

Stiliderus discalis ( F A U V E L )

Stilicoderus discalis F A U V E L , 1895, Rev. d 'Ent 14: 225. .Stiliderus discalis: R O U G E M O N T (1986) Ent. A b h . Mus . Tierk. Dresden 49(8): 163.

1 Ç : Vietnam, Cuc-phù6ng B ô n g jungle, extracted f rom li t ter 12-15. X I I . 1965 leg. T . P ó c s ; 1 rf & 1 9 : ib id . , extracted f rom roots o f Asplenium nidus 15. X I I . 1965, leg. T . P ó c s .

This is the first member o f the genus recorded f rom Vietnam. The species is k n o w n f rom Burma •and Thailand.

Stiliderus nepalensis R O U G E M O N T

Stiliderus nepalensis R O U G E M O N T (1986) Ent. A b h . Mus . Tierk . Dresden 49(8): 172. Stiliderus nepalensis R O U G E M O N T (1986) Rev. Suisse de Zool . 93(1): 233

1 $ : India, W. Bengal, Darjeeling Dis t r . on road to Lebong. leg. Gy. T o p á i . N o . 311 sifted l i t ter , mosses 11. I V . 1967.

This species is known wi th certainty f rom two localities i n Nepal , and possibly (1 9 ) from Sikkim. Only the eventual discovery o f males w i l l prove that this ex. belongs to S. nepalensis and n o t to the variable S. kambaitiensis SCHEERPELZ.

* * *

The fol lowing five taxa belong to the New Guinea hieroglyphicus-group, comprising species which are so similar that they may only be determined by examination o f the aedeagus. A t least some o f these species are sympatric, so that females among material f rom the same local i ty containing more than one species are for the present indeterminable, and are labelled by me "Stiliderus sp. hieroglyphicus gr.". Because I can find no other characters for the seperation o f these species, I have, as i n a previous paper (ROUGEMONT, i n press Reichenbachia, Mus . Tierk. Dresden) l imi ted descrip­tions to the proportions of holotypes; i n a l l other respects the characters may be assumed to be those o f S. hieroglyphicus F A U V E L as redescribed i n my revision ( R O U G E M O N T 1986). T o facilitate determi­nations wi thout recourse to other papers, I give below a plate o f figures o f the aedeagi of a l l the species known so far.

Stiliderus loksai sp. n .

rf holotype & 4 çfçf paratypes : New Guinea / N E , Wau, K i l o l o Creek, 26. V I I I . 68 / N o . N G - W :R.7 / leg. D r . I . Loksa; 2 çfçf Paratypes: New Guinea / N E , Wau 8. I X . 68 / N o . N G - W R.19 / leg. D r . I . Loksa.

Proportions o f holotype: length: 4.6 m m ; length o f head: 63; breadth o f head: 76; length o f antennae: 125; length o f p rono tum: 66; breadth o f p rono tum: 60; length o f e lytra: 77; breadth o f elytra: 74.

This species is best characterised by the shape of the parameroid lobes, which resemble those o f 5. hornabrooki R O U G E M O N T , but are different i n outline (see Figs. 6 & 9). The paramere is also similar to that species, but is not quite so broad ( in ventral view), and is longer (not reaching beyond the apices of parameroid lobes i n S. hornabrooki), it 's apex recurved as i n S. hieroglyphicus F A U V E L , 5. leai R O U G E M O N T and others.

Stiliderus wauensis sp. n .

çf holotype: New Guinea / N E / Wau, K i l o l o Creek, 26. V I I I . 1968 / N o . N G - W R. 7 / leg. D r . I . Loksa.

Proportions of holotype: length: 5 m m ; length o f head: 67; breadth o f head: 72; length o f antennae: 126; length o f p rono tum: 66; breadth o f p rono tum: 62; length of e lytra: 82; breadth o f elytra: 80.

The broad subtriangular ( in lateral view) shape of the parameroid lobes is unl ike that o f any other member o f the hieroglyphicus group except the fol lowing species. The paramere is fairly broad, laterally compressed, the apex scarcely reaching beyond the parameroid lobes, not dilated or recurved (fig. 4).

Stiliderus maritimus sp. n .

rf holotype: New Guinea / SE / Port Moresby, R igo , 18. V I I I . 1968 / N o . NG-P R 2 / leg. D r . I . Loksa.

Proportions o f holotype: length: 4.8 m m . ; length of head: 68; breadth o f head: 73; length o f antennae: 126; length o f p rono tum: 64; breadth o f p rono tum: 60; length o f e ly t ra : 78; breadth o f e ly t ra : 73.

The aedeagus of this species is proportionately smaller and more elongate as i t is also in S. sharpi R O U G E M O N T . A further resemblance of these two species lies i n the internal structures of the median lobe, but the paramere o f the new species is longer, it 's apex laterally compressed, and the parameroid lobes are o f quite another shape, resembling those of the preceeding new species, Aedeagus: F ig . 5.

Stiliderus madangensis sp. n .

cf holotype: T 779. Madang N . G . 22.12.69 (in coll . Last) This new species is the only one o f the hieroglyphicus group to be clearly differentiated on external

characters as wel l as by those o f the aedeagus. Proportions o f holotype: length: 5.6 m m . ; length of head: 73; breadth o f head: 83; length o f

antennae: 154; length o f p rono tum: 72; breadth o f p rono tum: 68; length o f e lyt ra : 86; breadth o f elytra: 82.

This species differs f rom a l l other members o f the hieroglyphicus group by i t ' s greater size, black elytra (brown in the other spp.) and by the puncturation o f the elytra, which is finer and denser;

Figs 1-9 Aedeagi in right lateral and ventral views: 1 = Stiliderus hieroglyphicus F A U V E L , 2 = 5 madangensis sp. n . , 3 = 5 . leai R O U G E M O N T , 4 = 5 . wauensis sp. n . , 5 = 5 maritimus sp. n , 6 = S,loksaisp.n.,7 = 5. sharpi R O U G E M O N T , 8 = 5 wallacei R O U G E M O N T , 9 = 5 hornabrooki^ R O U G E ­M O N T . — Fig . 10. Aedeagus, i n right lateral view of 5. kiloloensis L A S T . — Scale lines represent 1 m m .

Smaller scale line for 5. hornabrooki ROUGEMONT, larger l ine for a l l other species.

6 Term. Tud. Múz. Évk. 1986.

although the granules are smaller, they are more prominent, i n sharper contrast to the shiny inter­stices.

The insect's greater size wou ld make i t run i n m y key (Revision) to members of the aerosus group, bu t the strongly transverse head and the conformation o f the aedeagus (Fig . 2) clearly show it 's true affinity. The very long parameroid lobes are only comparable wi th those o f S. hieroglyphicus F A U V E L (Fig . 1) but are o f a different shape. I n ventral view the laterally compressed blades o f the parameroid lobes appear together wi th the acicular paramere to fo rm a single long, pointed structure.

Stiliderus sp. hieroglyphicus group

1 cf: New Guinea / N E / Baiyer River Sanctuary, 1-5. I X . 1969 / N o . N G - B 85 / leg. Dr . J. Balogh.

This is apparently also a new species, but cannot be described because the specimen is immature, and the characters o f the aedeagus are deformed and unclear.

Stiliderus spp. $ $ (hieroglyphicus group)

1 ex.: New Guinea / N E / Wau , K i l o l o Creek, valley 900 m., 23. V I I I . 1968 / N o . N G - W - B 15 / leg. D r . J. Balogh; 4 exx.: Ib id , (wi thou t "valley 900 m . " ) ; 26. V I I I . 1968 / N o . N G - W . ?.7 / leg. D r . I . Loksa; 1 ex. : New Guinea / N E Wau, M t . K a i n d i , 10, I X . 1968 / N o . N G - W - B 94, leg. D r . J. Balogh; 1 ex. : New Guinea / N E / W a u , 8. I X . 1968 / N o . N G - W . ? 19, leg. D r . I . Loksa.

Many of these are probably S. loksai sp. n. , bu t must remain for the present undetermined.

The last species represented i n the material belongs to the cicatricosus group, to be studied in the second part o f m y revision.

Stiliderus crassus ( K R A A T Z )

Psilotrachellus crassus K R A A T Z , 1859, Arch . Naturg . 25: 124. 1 9 : Indo-China. 5. crassus was described f r o m Ceylon, and is cited from several countries in eastern Asia by

C A M E R O N , B E R N H A U E R and by K R A A T Z himself I have yet to confirm, by examination o f the holotype, whether the Far Eastern exx. belong to the same taxon as the Ceylanese holotype. I know the taxon to which the above specimen belongs w i t h certainty f rom Thai land, Singapore and China. I t is new to any o f the three countries which formerly constituted French Tndochina'.

References

L A S T , H . (1984) : Recorded and new species o f Coleoptera (Staphylinidae, Paederinae) i n Papua New Guinea. — Fol. ent. hung. 4 2 : 109-125.

L A S T , H . (1984): Further new species o f New Guinea Staphylinidae (Coleoptera) i n the collections of Hungarian and British Museums. — Annls hist.-nat. Mus. nat. hung. 7 6 : 133-138.

R O U G E M O N T , G . D E (1986): Revision o f the genus Stiliderus Motschulsky 1958. Part I ( = Stilico­derus Sharp). (Coleoptera, Staphylinidae). 14th contr ibut ion to the knowledge o f Staphylinidae. — Ent. Abh. Mus. Tierk. Dresden 4 9 (8): 139-187.

R O U G E M O N T , G . D E (1986): N e w data on the genus Stiliderus (Coleoptera, Staphylinidae). 18th contr ibut ion to the knowledge o f Staphylinidae. — Reichenbachia, Mus. Tierk. Dresden

R O U G E M O N T , G . D E (in press) : N e w records o f Stiliderus f rom Nepal (Coleoptera, Staphylinidae). 21st contr ibut ion to the knowledge o f Staphylinidae. — Rev. Suisse de Zool. 9 3 (1) : 233-236.

Author's address: GUILLAUME M . DE ROUGEMONT

27 Walcot Square London SE11 Great Britain