no i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 33 



more abundant; as a rule they have a central pit, but bear no hairs. There are a few such 

 fungoid warts on the underside of the body. Thoracic legs black, the midabdominal legs brown. 



Stage before the last?: Length 30 mm., width of head 4 mm. Exactly as in the last stage, 

 but the fungoid warts are all white. The setiferous warts are scarcely larger or more pronounced 

 than in the last stage, but the paired dorsal ones on the ninth abdominal segment are a little 

 larger than those on the eighth segment and seated on a ridge, and each incipient tubercle bears 

 about four setiferous warts, while those on the eighth segment each bear only two long setae. 



Thus Cirina is seen to be a primitive generalized form, as regards the larva, as in Usta 

 and Heniocha, and we have in this family a group of generalized forms like Satumia. 



[An allied form has recently (1911) been described as Cirina butyrospermi Vuillet.] 



IMBRASIA Hiibner. 



Imbrasia Hubner, Verzeichniss bek. Schmett., p. 154, 1822.? 



Lomelia Duncan, Naturalists' Libr., exot. moths, p. 125, 1841. 



Bunaea Walker, Cat. Lep. Het. Br. Mus., V, p. 1233, 1855. 



Imbrasia, Maassen and Weymer, Beitrage Schmett., V, 1886. 



Imbrasia Kjrby, Syn. Cat. Lep. Het., I, p. 753, 1892. 



Imbrasia, Sonthonnax, Annates Labr. d'Etudes de le soie, X, p. 46, 1901. 



Imago. — <? and 9. Head moderately large; front moderately wide, not triangular, but 

 with the sides parallel. Male antenna? with 25 joints, bipectinate, moderately wide, the last 

 joints with vestigial pectinations, tip subfihforni for a distance nearly as wide as the pectinated 

 portion; joints rather long and slender; distal pectinations as long as the basal ones in the mid- 

 dle, but toward the filiform tip they become shorter, in 9 filiform, flattened ; distal teeth about 

 a quarter as large as the basal ones, naked, not scaled on top, oidy a few scales present. Palpi 

 short, depressed, stout, not reaching the front; third joint distinct, but depressed and not 

 passing beyond the end of the second joint. 



Fore wings falcate, markedly so in s , costa straight on the basal two-thirds; toward the 

 apex arched, apex itself obtuse; outer edge quite deeply concave in cf , less so in 9 . 



Hind wings with the apex square, angulated, and outer edge continued into a marked acute 

 angle almost forming a "tail"; the inner angle decided; in 9 the apex is rounded ; the outer edge 

 only slightly bent. The abdomen does not reach the inner angle of the hind wings in either sex; 

 in the s only as far as the extradiscal line. Legs rather long and stout. 



Venation: Vein II 2 , [III 2 in revised nomenclature] present, well developed, arising near, 

 just within, end of vein IL. ; vein II, and stalk of veins II 3 and II., arising near each other and just 

 beyond the outer third of the discal cell; veins IIIj and III 2 arising at the same point as origin 

 of discal vein, vein III, not detached, and arising at a point toward the middle of the discal cell; 

 discal veins together forming a slightly curved line, directed a little outward. Hind wings and 

 vein IIIj supporting the tail; discal veins forming an oblique line directed outward; origin of 

 vein III 2 detached from that of vein IIIj. 



Markings: Ground color reddish brown; no ocellus on the fore wings, only a small sub- 

 triangular clear spot ; on the hind wings a large complete ocellus, which, however, contains only 

 a small clear spot. 



Legs rather slender; fore tibia? slender (when denuded) with no spurs; the odoriferous sack 

 about two-thirds as long as the tibia itself, narrow lanceolate oval, very sharp at the end, with 

 a median ridge along the outside. 



The genus may be recognized by the narrow antennas, filiform in the female, by the short 

 stout palpi, the falcate fore wings, and the prominent angle on the hinder pair, forming short tail. 

 The species are of large size. In venation this genus is near Gynanisa, belonging in that section 

 of the family. 



Geographical distribution. — West coast of Africa, Cameroons, [Nyassa]. /. epimeihea Cramer 

 is Huebner's type. [Kirby (Cat. Lep. Het., I, p. 754) considered this to be distinct from the 

 original I. epimeihea (Drury), and renamed it crameri. Rothschild considers crameri to be a 

 form of epimeihea (Drury).] 

 83570°— 14 3 



