NO. 1140. NORTH AMERICAN NOCTUIDAE-SMITH AND DYAB. 49 



LARVA. 



Smith and AimoT, Lep. Ins. (ia., 17!)7, II, pi. xcii (/(rts/w^i/era).— Gueniok, Spec. 

 Gen., Noct., 1852, I, p. 48 (acericola). 



Sta(/(' IIL — Head bilobed, black, a few hairs; width, 1.8 mm. Body- 

 black, warts coucolorous; hair thick, but short, obscuring the body, 

 tawny brown, tii)i)ed with black and white, scant subventrally. On 

 joints 5, 7, and 12 a black dorsal tuft, higher than the rest of the hair, 

 and in the subdorsal space on joints 5 to 13 the hair is white. 



Stage IV. — Head bilobed, smooth, black, and shining; a few white 

 hairs; labrum whitish; width, 13.4 mm. Body black, spiracles white, 

 warts III, IV, and V orange. Hairs as before, the brown strongly 

 tipped with white. 



)Staf/(' V (interpolated). — Head as before, slightly creased; width, 

 3.2 mm. Body black, all as before, but the dorsal tufts are scarcely 

 longer than the other hairs, while all are tipped with white. 



Stage VI. — Head bla(;k and shiiung, labrum pale; a V-shaped pale 

 line parallel to the sntures of clypeus; width, 4.G to 4.8 mm. Body 

 black, spiracles white. Hair dense, of even length, not long, the second- 

 ary hairs not abundant. Warts distinct though small, few-haired, 

 III and IV reddish. Hair dark brown except in a broad dorsal band 

 on joints 5 to 13, which is black, containing the concolonms tufts on 

 joints 5, 7, and 12, which exceed the other hairs very slightly. Both 

 the black and the brown hairs are sparsely barbuled and end in very 

 slightly enlarged colorless tips, which give the larva a hoary appear- 

 ance quite characteristic. The hairs form bands across the segments 

 as in (laetylina, but the bare incisions are much narrower than in that 

 species. A few longer hairs from the extremities; dorsal hair not 

 keeled. Length, about 35 mm. 



Cocoon. — Kllii)tical, rather narrow, tough, and firm; composed of silk 

 and some larval hairs intermixed; no wood, chips, or earth. Length, 

 30 mm. 



Pupa. — Shaped as in leporina, the abdominal segments punctured on 

 the anterior half; (luite regularly tapering. Cremaster a low, wide ele- 

 vation, with a cluster of four hooks on either side above and a single 

 remote one below and farther in front. Color, dark blackish brown, 

 slightly shining. Length, 18 mm. 

 Food plants. — Alder. 



ACRONYCTA HESPERIDA, new species. 



(riates X, fig. 9, female adnlt; XIX, fij;;. 15, ni;ile genitalia.) 



Ground color bluish ash gray, with very fine black and coarser smoky 

 l)owderings. The ordinary markings are distinct in the male, but some- 

 what washed and indefinite in the female. The basal line is marked on 

 the costa only, and then but feebly. The transverse anterior line is 

 outwardly oblique, geminate, outcurved between the veins, and reaches 

 Proc. N. M. vol. xxi 4 



