Sta.e ondensed - Hindawi Publishing Corporationdownloads.hindawi.com/journals/psyche/1899/087058.pdf · shields small with few setea. Green; tu-bercle onjoints 5 to 7 enlarged and

April 89.] .P,.. YCHtL 349

SPATHULATE HEAD SETAE ON THE LARVA OF CHAMYRISCERINTHA TREITS.

BY HARRISON G. DYAR WASHINGTON D. C.

I had occasion to notice spathulate headsetae in the case of Cicinnus mels]eimeri

(Journ. N. Y. ent. soc., iv, 92). A secondinstance is found in Chamyris cerintha,though here it is the first epicraneal setathat has become flattened instead of thefourth, and the structure disappears at thelast moult. A ondensed description of thelast stage of the larva has been given byMr. Coquillett (Papilio i, 56); but he doesnot refer to the spathulate hairs of the earlystages. I assume the number of stages forconvenience in indicating them; I do notknow that seven is the true number.Stage IV. Slender, anal feet divergent:

head strongly bilobed, the lobes angular, theapex black with a line passing down bothfront and back lateral angles; green; seta

short, spathulate width 1.2 ram. Body withjoint I2 slightly enlarged; setae single, stiff,coarse, black; i, ii, iii, v, pointing sharplyforward iv and vi backward, all normal, setaiv behind the middle of the spiracle; legshields small with few setea. Green; tu-bercle on joints 5 to 7 enlarged and black;an obscure white lateral line above wart iii;

anal feet and a subventral dash on joint 12,

crimson. The two anterior pair of abdom-inal feet are slightly weaker than the others.

Stage V. The same; a broken reddishline runs along warts and ii, which are

nearly in line; white lateral line distinct.

Sta.e VI. The same;the white lateralline is sharply edged; head green, the blacklines fainter than before, seta still spath-ulate.

Stage VII. Head more rounded, seta no

longer spathulate, very short; the lobesare low, not angular. Body slender, dorsumbetween the distinct white lateral lines filled

in with dark vinous purplish, the subventralregions green. Setae coarse, long and blacktubercle ii on joint I2, and on 13 large,high and conical, the others normal.The line on the head is abbreviated,

partly or wholly brown width 2.5 mm. Ab-dominal feet essentially equal.

tToodlants. Wild cherry and plum.Larvae solitary, very active and quickly

spring off of the plant when disturbed, like

some Deltoids.

AN. APP&RENTLY NEW LECANIUM FOUND ON WHITE CEDAR.

BY T. D. A. COCKERELL AND G. B. KING.

This article is written by Mr. Cockerell,but is partly based on Mr. King’s notes andobservations.When Mr. King sent me a small almost

globose Lecanium found on White Cedar,I could hardly believe it could be anything

but a form of L.jqetceri, especially sitace hehad found some veritable jfetceri in Massa-chusetts on arbor-vitae. A close examina-tion of the Cedar scale, however, revealsdifferences which must surely be specific, sothe insect is described herewith.

350 t’SYCHE. [April I899.

Lecanlum 3allidior, Ckll. & King, n. sp.. Scale. 3 ram. long, 2 broad, I tohigh, very convex, very shiny, wrinkled;light yellowish-brown or ochreous, paler atthe sides than dorsally. This is a very muchpaler scale thanffletcerl, and when boiled incaustic potash it becomes very pale and trans-parent, whileffletc]eri remains dark brown.Antennae. Six-segmented, the segments

measuring as follows in ix (I.) 34-51.28-3. (3.) 42-45 (4.) 34’ (5.) 23-3. (6.)34-42. Mr. King reports a 7-segmented an-tenna, with the last three segments measur-

ing respectively i2, 16 and 38 ix. This agreeswell enough with fflelcberl, which I find

always to have 7 segments, the last threeI4-2o, 14-17 and 39-42 ix. There is also thisin common with jTetc/zert, that the secondsegment is shorter than the first or third.

Legs. The different legs are similar in

type, bu the tibiae and tarsi are variable.Four legs measured gave as follows (ix.)

(.) (,-.) (3.) (4.)Coxa 87. 85. 87. 85.Femur+ trochanter. 16. 16. 6. 18.Tibia 76. 82. 68.Tarsus + claw 65. 76. 90. 79.

The first is an anterior leg. These dimen-sions are very different from those of L.)qetcheri, as will be seen by comparing thestatistics given below.

Lecanium jfetctzerL Ckll.

A ngenncte. (ix.) Segments. 3. 4. 5. 6. 7.Mass. spn. 36. 34. 45. 42. 17. 42.

Canadian spn. 42. 48. 37. 14. 14. 39.

Legs. (ix.) Coxa. Femur+ Tibia. Tarsus+troch, claw.

Mass..spn. I3. 127. 87. 85.Canadian front leg. 56. xo7. 9 85.

middle leg. 144. 96. 93.hind leg. 13o. 141. 93- 9hind leg. 13o. 93. 96.

The front legs of ]qelc/eri appear thus to

differ appreciably from the other four as

regards the coxa and femur. Both coxa and

femur of the middle and hind legs are notice-

ably longer than in pall/dior.Lecanium pallidior was found by Mr. King

at Methuen; Mass., Nov. 15, 1898, on small

twigs of C]zamaecyparis lkyoides (L). Theleaves and small limbs .were thickly coveredat that date with young larvae. The speciesbelongs, of course, to Eulecanium.

TWO NEW COCCIDS FROM

BERMUDA.

I January of this year, the writer in hissearch for coccids infesting green-houseplants, observed a potted plant in one of theconservatories visited, trimmed quite closeto its roots, and the remaining stumps wellcovered with a small clear white scale. Theplant in question was recognized at once tobe Cycas revoluht. Upon enquiry it was

learned that this plant was imported fromBermuda last year. Some of the old stems

with the coccids were taken for study. Oneof the species proved to be Asjbidiolus hede-

rae Vallot, a very common species throughthe United States, and the other coccid was

new to the writer, who sent a mount andsome of the scales to Prof. Cockerell for

determination. He identifies it as Aulacas-

is eleans Leon. Described as I-[ovardia

eleans, and only known hitherto fromPortici [taly, on Cycas revoluta. The d’and o scale are unknown. The speciesdiffers from typical Aulacaspis by lackingthe circumgenital glands. The occurrenceof this species is of much interest and thecoccids of Bermuda are almost unknown.There are only two other species known to

the writer recorded from hose islands,

Mytilasjhi citricola Pack. on orange andlime trees, and Cionasibis citri Comst. on

orange. Geo. B.linff.Lawrence, Mass., Feb. 27, z399.

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Sta.e ondensed - Hindawi Publishing Corporationdownloads.hindawi.com/journals/psyche/1899/087058.pdf · shields small with few setea. Green; tu-bercle onjoints 5 to 7 enlarged and