182 GROTE & ROBINSON. 



covered with long hair-like scales over the disc and hase; the siibter- 

 niiiial shade and black interspaceal streaks of the upper surface are 

 here reproduced. Seoondaries, a little paler, but resembling their up- 

 per surface in appearance. 



Expanse, 9 , 2.00 inch. Length ofhocli/, 1.10 inch. 



Habitat. — Atlantic District. (Pennsylvania !) 



Closely allied to H. obliqua, but diflPering by the brown terminal 

 shade of the wings, which are dusted with olivaceous atoms over medi- 

 an space inferiorly, the darker fringes, the continued and even termi- 

 nal lines, and by the distinct ornamentation of the anal segments of 

 the abdomen above. 



Heterocampa tessella- (Plate 4. fig. 29, % .) 



Lorfunmu.s icsscUa, Tack., Syn. U. S. Bomb., Proc, Ent. Soc Phil. p. o70. 

 (November, 1804). 



% . Head, whitish cinereous. Antennae, blackish, dusted with pale 

 scales along the stem at base above, bipectinate for fully one-half their 

 length, the pectinations decreasing in length outwardly. "Collar" 

 and tegulae, concolorous, whitish cinereous, with a greenish, pale oli- 

 vaceous tinge, the former with a central, shaded, obscure greenish line, 

 the latter edged with dark scales and with a terminal dark line. The 

 thorax, between the tegulae, is clothed with mixed obscure olivaceous 

 and dark scales, so as to form a triangulate dark patch, contrasting 

 with the pale prothorax and tegulae, and having its apex centrally, be- 

 hind the prothoracic pieces. Abdomen, above, obscure and dark cine- 

 reous; some longer blackish hairs over basal segment; anal and prean- 

 al se^'inents, paler, somewhat olivaceous, the latter with two sub-dor- 

 sal dark stains. Beneath, with under thoracic parts, whitish cinereous, 

 shaded with pale olivaceous. Tarsi, annulate with black; legs covered 

 with long, whitish cinereous, hair-like scales; tibial hairs transversely 

 barred outwardly with black lines, most distinct on the fore and obso- 

 lete on the hind legs. 



Primaries, whitish cinereous, evenly washed with a pale greenish, 

 olivaceous shade. Costa a little depressed centrally; apices })roduced; 

 external margin, oblique, and somewhat inwardly depressed below first 

 median nervule. Extreme base for a short space, paler colored. A 

 dentate black basal half-line. Sub-basal space evenly shaded with ob- 

 scure cinereous scales. Transverse anterior line, geminate, black, ir- 

 regular, dentate. Beyond it the median space is at first whitish, free 

 from dark scales, becoming outwardly delicately tinged with pale 

 "•reenish olivaceous. A faint, linear discal mark, surmounted on costa 



