616 BIB JOHN LUBBOCK ON

On some Spitzbergen Collembola. By the Rt. Hon. Sir JOHN LUBBOCK, Bart., M.P., F.R.S., D.C.L., &c.

[Read 5th Xay, 1898.1

OWING to the well-known tolerance of cold by the insects belonging to the order Collembola, i t is not surprising that several species should occur in Bpitzbergen. 10 Greenland eleven species have been recorded by Meimrt * ; but, so far as I am aware, only 5 species have been previously recorded from Spitzbergen. The first was originally dewribed by Bohernan t as Podura hyperborea, but, as I have shown elsewhere $, it is a species of Achorutes. Five species were added to the Spitz- bergen list by Tull berg 5 : they are Srninlhurus Halrngreni, Tullb., Isotorna palustris (Qmel.), Achorutes viaticur, Tullb., Lipura arctica, Tullb., and Lipura grmdandica, Tullb. I am now able t o add two more species, of which one is new. They were collected, with specimens of two other spccies, by Mr. Trevor- Battyo during Sir Martin Conway’s expedition to Spitzbergen in 1896.

Oenus I. IBOTOMA, Bourlet, 1839.

Species 1. IBOTOXA BPITZBEUGENENBIB, n. sp.

Diagnosis.-Pilosa. Antennm capite non vel paullo longiores, nrcticulus tertius quartusqua mqualeg, secuodo longiores. Tibiie sine setis teneutibus. Unguiculus superior nou dentatus. Seg- mentum tertium abdomiuale quarturn longitudine fere mquans. Furcula usque ad tubum ventralem pertinens. Dentes furculse inanubrio non longiores, recti j mucrones tridenticulati ( I . Long. 2-22 millim.

Habitat. Dickson Bay, Spitzbergen.

+ FR. MErNmT.

Collected July 1896.

I ‘ Neuroptera, Pseiidoneuroptera, Thysanopoda, Mallo- pbaga, Collembola, Suctoria, Siphunculata Graenlandica,” Vidensk. Meddel.

I‘ Spebbergene Insekt-Fauna,” Ofvers. K. Vet.-Akad. 1890 (1897), pp. 167-173.

? 0. H. BOHE~IAN.

4 LUBBOCK. Monograph of the Oollembola and Thysanura, p. 180. $ T. TULLBERO. “ Collembola borealis," Ofvers. I(. Vet.-Akad. Handl.

11 It has been usual to count the terminal point 88 a tooth. This meme

Handl. vol. xxii. 1866, p. 677.

vol. xxxiii. 1876, no. 5, p. 42.

hardly correct ; but I have thought it best to use the usual nomenclature.

SOME BPITZBEBGEN COLLEMBOLA. 617

A$i/iities.-A revision of all the Palsarctic Collembola up to 1892 has been published by H. Schott *, who gives diagnoses aud a synonymy of most of bhe species.

Thia species may be distinguished from other boreal Isotomm by aid of the following synoptical table. I do not,,however, wish to commit myself to the opiuion that all the species here mentioued are really distinct.

A. Spring not reaching to the ventral tube. IsotomaJtnzetariu (Linn.).

,, nzinuta, Tull b. ,, sexoculata, Tullb. ,, quadrioculata, Tullb.

€3. Spring reachiug to the ventral tube. a. Antenna twice, or nearly twice, as long as the head.

Isotofna viridis (Ginel.), Bourlet. ,, palustris (MiiI1.j. ,, ayuatilis (Mull.). ,, angZica, Lubbock. ,, S t u d e r g i i , Tullb.

b. Anteiins not, or little, louger than the bead. c. Teeth of the spring obtuse.

Isotonzcc crassicauda, Tullb. ,, litoralis, Schvtt.

d. Teeth of the spring pointed. e. Tibia with one or more tenent hairs.

Isotonza &uteri, Schott. ,, sensibilis, Tullb. ,, clavata, Schott. ,, denficulata, Bchiiffer. ,, cinerea, Nicolet.

f. Tibia without teneiit hairs (or tenent hairs not mentioned).

9. Four or more teeth to the mucrones. Isotonza olioacea, Tullb.

,, violacea, Tullb. ,, kiemalis, Schott. ,, grandiceps, neuter.

* HARALD SCII~~TT. “ Zur Systematik und Varbreitung der paharcliacher Collarnbolu,” K. Svensk. Vet.-Akad. Hundl. vol. xxv. no. l i (1893).

615 STB JOHN Lumocli ON

71. Two teeth to the mucrones. lsotoma bidenticulata, Tullb.

,, grisers, Lubbock. i. Three teeth placed one after the other.

Isotoma tigrina (Nicolet). ,, grisescens, Schaffer. ,, maritima, Tullb. ,, longidens, Schiiffer.

lsotoma spitzbmgenensia. 1. Side view of head. 2. Side view of foot. 3. Foot men from above.

6. Tip of same, more magni6erl. 4. The spring. 7. Thecatch.

The new species agrees with the last four in the above table in the possession of three teeth in the mucrones ; but it differs €rom them by having two of the teeth at the base, and also by the form of the mucrones. The only two remaining species with which it should be compared are I. minor, Schiiffer, and I. nota- bilis, Schiiffer. I. minor * has the dentes of the spring 23 times as long as the manubrium, and the fourth segment of the antenna is also longer than the third. I. notabilis t also has the

“Die Collembole der Umgegend von Hamburg,” Mitt. a. d.

6. Side view of same.

* SC~~FFEB.

-I Schiiffei-, ibid. Naturh. Mus. Hamb. 701. xiii. 1896 (1896), p. 179.

BOME BPITZUEBQEN COLLEMBOLA. 61 9

dentes 2$ times as long as the manubrium, and the fourth seg- ment of the antenna longer than the third. The teeth of the mucrones are also ditl’erently placed.

Species 2. IBOTOMA QUADRIOCULATA, Tullb., 1871. Fort. ofver Svenska Podurider,” Ofvers. K. Vet.-Akad.

Fiirh. vol. xxvii. 1871, p. 152; d Tullberg, “Sveriges Podurider,” K. Svensk. Vet.-Akad. I-Ittndl. vol. x. no, 10, 1872, p. 48, pl. ix. figs. 25-31.

A number of specimeiis of this minute species were collected at Advent Bay early in August l d 9 6 j they were found living in damp moss. The species has been recorded from Greenland, but not previously from Spitzbergen.

Tullberg,

Genus 11. LIPURA, Burmeister, 1838.

Species 1. LIPURA ABCTIUA, Tullh, 1876.

Tullberg, ‘‘ Collembola borealis,” 6fvers. K.Vet.-Akad. Fiirh. vol. xxxiii.

This species was recorded from Spitzbergen at the time of its It was found by Mr. Trevor-Battye with the

1876, no. ti, p. 39, pl. xi. figs. 47-60.

first description. I. spitzbergenensis on the shore of Dickson Bay.

Species 2. LIPUEA QRCENLANDICA, Tullb., 1876. Tullberg, op. c i f . p. 41, pl. xi. figs. 57-68.

This species has also been previously recorded from Spitz- bergen, but the precise locality was not stated. The specimens on which the present record is based were collected a t Advent Bay on August 12th, 1896, and were found in some wet moss in n swamp.