MEMOIKS OF THE IfATIONAL ACAOFAIY OF SCIENCES. 
99 
Length of larva, 41 niin. at maturity. 
Cocoon* — Spun among leaves. Tt i.s compo.sed of gummy silk, slight, hut tough. 
Pupa. — Nearly cylindrical, rounded, no cremaster; abdomen puucture<l, case.s coarsely creased; color nnifonu 
dark brown, nearly black. Length, 17 mm.; width, (5 mm. 
Food plants. — Poplar {Popnlus tremuloides and P. hahamifera). Lnrvue tVom Yosemite, Cal, (Dyar.) 
Dr. Dyar tells me that he has tbund at Keene Valley, New York, the larva of O. avimacula 
or slossonkey 'which is exactly like that of G. serem, described above. 
Subfiimily II. — Apatelodin^.* 
Head more prominent than in the previous family; antenme well pectinated to the tips; palpi 
large, stout, ascending, reaching well beyond the front. Fore wings triangular, falcate, aud with 
the outer edge bent in front of the middle on the sixth subcostal venule. Hind wings with the 
apex much rounded. Hind legs very thick, the femora oval. 
Larv^a cylindrical, almost entirely concealed by the long wool-like hair, through which arise 
long pencilsof hairs; in angelica., hairs short. Freshly hatched larva clothed with long white hairs. 
The reference by Mr, Druce (Hiologia Centr. Amer., p. 208) of this genus to the Lasiocamindm 
seems to us to be quite erroueous, as the venation is truly Notodontian and very unlike that of 
any of the Lasiocampidie known to us, in all of which there are four branches of the cubital vein 
of both wings, and no bristle (frenulum) on the hind wings. The larva does, however, have a 
sui^erficial resemblance to that of some Lasiocampjp. Let the reader compare the venation of 
Apatelodes with that of Ichthynra and Nadata. The end of the abdomen is also tufted much as 
in Ichthynra. Aj)atelodes also s]»ins no cocoon. Acronyctodus of Edwards is closely allied; the- 
single species known is from Vera Cruz, iMexico. 
Apatelodes Packard. 
(PI. XXXVIII, ligs. 5, 5a-5c, venation.) 
Phalcena, Abbot and Smith, Nat. Hist. Lcp., Georgia, p. 151, 1797. 
P\j<jwra (in part) Hiibn., Verz. Scbinett., p. 162, 1816. 
Paraihyria Hiibti., Verz. Schmott., p. 158, 1816. 
Apatelodes Packard, Syn. Bombycidae U. S., Pt. II, Proc. Ent. Soc. Phil., 253, Nov., 186+. 
Groto, Check List N. A. Moths, p. 18, 1882. 
Druce, Biologia Centr. Amer., PI. L^■I, p. 208, March, 1887. 
Smith, List Lep. Bor. Amor., p. 29, 1891. 
Head moderately prominent, the front rather broad, more so than usual, subtriangnlar, the 
hairs clothing it ratlier uneven and loose. Antennae in 6, evenly branched to the end, but the 
pectinations shorter than usual, about as long as tlie thorax. Palpi large, thick, stout, slightly 
ascending, reaching well beyond the front, tips broad; third joint minute, nearly concealed, iiot 
distinct from second Joint. Eyes naked. 
Tliorax simple, not tufted. Fore wings triangular; nearly one-half as broad as long; in the 
9 much broader; costa straight, much curved at the apex; outer uuu'gin hollowed just below the 
apex, rendering it unu.sually falcate. P>elow the apex the outer edge of the wing is oblique, not 
indented, but making an obtuse angle with the straight inner edge. Costal vein extending nearer 
the apex than usual. First, second, and third subcostal venules suddenly detlexed upon the 
costa very near each other. Apical interspace broadly triangular. The fourth and fifth subcostal 
venule.s of the same length; no subcostal coll. Discal area short and broad; the discal venules 
situated within the middle of the wing; the posterior discal venule oblique, though curvilinear. 
Jlind wings large, full, and rounded on the outer margin, of au irregular pentagonal form 
reaching nearly to the tips of the abdomen. Both discal venules very obli(iue, especially the 
hinder one. Tibiie with broad Bat coiicavo-coiivex tufts. Femora densely pilose, giving the Joint 
au oval form; hind tibim with dense scales, making it unusually broad, with four large spurs. 
Abdomen of 6 slender, with a tuft on each side of the tip. 
Coloration, no discal spot; with gray-browu transverse lines and blotches. 
The genus is easily recognized by the broad, very falcate fore wings, their peculiar venation, 
and by the unusually broad hind tibiie aud the large tufts at the eud of the male abdomen. 
‘ This name wa.s proposed by me in MS., but Neumoegon and Dyar afterwards published it lu 1894; the fact that- 
it was proposed by two diUereut authors shows that it is well founded. 
