NO. 1140. NORTH AMERICAN NOCTUIDAE— SMITH AND DTAIl. 79 



Stage VI. — As before, the dorsal patches darker, blackish brown, the 

 yellow borders narrow and dull. Tubercles I and II surrounded by 

 black. Width of head, 2.8 mm. 



Stage VII. — Head large, held out flat, the sutures deep; black, sha- 

 greened, aijices of lobes tipped with red; clypeus witli sutures broadly 

 greenish wLite; width, 4 to 4.5 mm. Body light olive graj^, a lozenge- 

 shaped dorsal enlargement on joints 5, 8, and 12, bearing tubercles I 

 at the corners, darker than the body and bordered with black. A 

 dorsal gray band, whitish centrally, enlarged on each segment to include 

 tubercle II. Lateral region irregularly shaded with gray. A lateral 

 brown band, defined by bhickish marks stigmatally. Hair thin, white, 

 very scant, almost absent dorsally, longer subventrally. Secondary 

 hairs numerous, short, the dorsal ones flattened, the subventral ones 

 long and normal. Warts normal, rather small, with few to several 

 hairs, those on the sides whitish. 



Cocoon. — "Spun under loose bark or in the crevices" (Thaxter); 

 "tough" (Riley). 



Food plants. — Elm, apple, linden. 



ACRONYCTA OCCIDENTALIS Grote and Robinson. 

 (Plates II, fig. 8, adult; V, figs. 7, 8, larv'a; XX, fig. 8, male genitalia.) 



Acronycta occidentalia Grote and Robinson, Proc. Ent. Soc. Pbila., 186(>, VI, 



p. 16.— Speyek, Stett. Ent. Zeit., 1875, XXXVI, p. 108. 

 Ajyatel a oooidentalis Grote, Ann. Lye. Nat. Hist., N. Y., 1876, XI, p. 302; Papilio, 



1883, III, p. 67.— Packard, Forest Insects, 1890, p. 167. 

 Hijhoma occidentalia Grote, Mitth., a. d. Roem. Mns., Hildesli., No. 3, 1896, p. 7. 

 Acromicta psi Guen^e, Spec. Gen. Noct., 1852, I, p. 43.— Walker, Cat. Brit. 



Mns., Het., 1856, IX, p. 42.— Grote and Robinson, Proc. Ent. Soc. Phila., 



1866, VI, p. 16, pr. syn. 

 Acronycta intcrrupta Gueni^:e, Spec. Gen., Noct., 1852, I, p. 46. — Walker, Cat. 



Brit. Mu8., Het., 1856, IX, p. 55.— Grote, Bull. Buff". Soc. Nat. Sci., 1873, I, 



p. 78.— Smith, Bull. 44, U. S. Nat. Mus., 1893, p. 46. 



Ground color ashen gray and quite even, sometimes with a faint yel- 

 lowish shading. Head and thorax immaculate, except for the line 

 extending from the sides of the palpi to the base of the wing. Prima- 

 ries with the ordinary markings fairly well defined. The basal line is 

 marked by geminate black lines on the costa. The transverse anterior 

 line is geminate, black on the costa, becoming broken and less defined 

 toward the inner margin, which is reached just a little within the middle. 

 As a whole the line is even and outwardly oblique. The median shade 

 is marked by an oblique blackish line from the costa to the reniform, of 

 which it darkens the outer margin. The transverse posterior line is 

 somewhat indistinctly geminate, the outer portion being narrow and 

 black, a little lunulate, the inner portion being hardly distinct and 

 principally evident by the somewhat paler included space. There is a 

 very vaguely defined pale subterminal line, which is irregular in course 

 and hardly traceable in most specimens. The basal dash is black and 



