170 rnOCEEDTNGS OF THE NATIONAL MUSEUM. 



usually without trace of outer line or discal spot. There is a tendency, 

 however, to a discal spot in the secondaries, and to a less marked extent 

 on the primaries also. 



Expanse, l.GO to 2 inches (40 to 50 mm.). 



Hahifat. — Nova Scotia to Florida, west to the Rocky Mountains; 

 May to August, in the more northern range; March to July, Wasliing- 

 ton. District of Columbia; lliley County, Kansas, in May. 



This is perhaps the most common of the species of this genus, and 

 the early stages have been described again and again in economic pub- 

 lications. There is very little variation. The specimens may be some- 

 what paler or somewhat darker, depending upon the amount of black 

 powdering; but it can be scarcely mistaken for anything else, because 

 of the narrow, sublanceolate primaries with the strigate maculations, 

 and the pure white secondaries. The head is retracted, small in size, 

 while the tongue is decidedly weaker than usual in the genus. The 

 palpi are short, and scarcely reach to the front in most of the speci- 

 mens. The anterior leg of the male is proportionately developed. The 

 tibia is stout, long in proportion to the femur, with the epiphysis small 

 and attached above the middle. The harpes of the male are rather 

 broad, but taper to a rather abrupt point. The clasper consists of a 

 single, long corneous process, pointed at the tip and a little curved. 

 The lower part of the process is very feebly marked, and is indeed 

 practically absent. The structure thus resembles that of the (oticri- 

 cana group, but for the fact that this starts from an oblique chitinous 

 ridge, and from nearly the middle of the harpes, instead of starting 

 directly from the membrane of the side piece near the lower margin. 

 Strictly speaking, ohlinita shows several interesting jioiiits of differ- 

 ence, and stands almost midway between the normal species belonging 

 to grouj) mirieoma and Arsiloitchi: If the insect is to be removed from 

 Acroiiycta it should find a place in the latter genus; but taking all con- 

 siderations together, I think it is best left where it is; for the present 

 at least. 



LARVA. 



Smith and Abbot, Lep. Ins. Ga., 1797, II, pi. xciv. — Gtienke, Spec. Gen., Noct,, 

 1852, I, p. 19. — Hakhis, Eiit. Corr., 18l!9, p. 311, lig. 14 (mlicis). — rACKAUD, 

 Guide Stud. Ins., 1869, p. 301.— Kilky, Amer. Ent., 1871, II, p. 311, lig. 210; 

 Tliird Mo. K'ept., 1871, p. 70, figs. L'9, 30.— SAXTNi)i.:KS,Cau. Ent., 1871, III, p. 226, 

 fig. — Gkntry, Proc. Ac. Nat. Sci., Phila., 1875, p. 24. — Gooi>ei-l, Can. Ent., 

 1878, X, p. 66.— Majiten, Tr. Dept. Agr., HI., 1880, p. 18, 131.— Gkote, Papilio 

 II, p. 99,— Saundkrs, Ins. Inj. Fruits, 1883, p. 325, fig, 337.— Packard, Fifth 

 Kept., U. S, Ent. Conim., 1890, p. 567. 



Staffe IT. — Head black or brownish black; width, 0.5 mm. Body 

 whitish, with a diffuse brown-black shade subdorsally and laterally, 

 heaviest on joints 5, 8-9, and 12, leaving little white patches on the 

 other segments. Venter shaded with brown. Hairs numerous, stiff*, 

 dusky black. 



i^tage III. — Head black; width, 0.7 mm. Body as before, but the 



