﻿March iSgsl PACKARD. LiFE-HlSTOKV OK HeTEROCAMPA OHLIQUA. 29 



on 2nd thoracic segment are similar yellow lines, not reaching the 

 front edge of the prothoracic segment, nor extending behind the 

 oblique sere brown band. 



S/tJgt' V and last. — Described Aug. 29. Length, 40 mm. Now 

 there are no prothoracic tubercles, but in place of each of them a 

 very slight elongate flattened callosity. Head rounded, smooth, 

 not so wide as the body; luteous, with a flesh-tint and slightly 

 purplish ; an ashy irregular band on each side of the head, above 

 the ocelli, with scattered spots between. The body is thickest in 

 the middle (much like Abbot's drawing) and pale flesh, marked 

 with numerous irregular reddish pink wavy hair lines. The usual 

 dorsal band is reddish, bordered with yellow, and enclosing a pale 

 almost whitish band. From the prothoracic segments the two 

 lines contract, dilating on the 3d thoracic segment, and becoming 

 widest apart on the 2nd and 3rd abdominal segments and again 

 widely separating on the 7th abdominal segment ; the two lozenge- 

 shaped spots thus formed enclose two parallel median pinkish 

 lines. On the suranal plate the two lines unite to form a median 

 pale sere brown band. Thoracic and abdominal legs pale, marked 

 with red. 



The freshly hatched larva differs from that of H. guttivitta in 

 having no traces of tubercles or horns on abdominal segments 4 

 to 6 ; in the first pairs having tines of quite different shape, being 

 thicker, and more spinose ; these horns being dull chitinous, of 

 the same hue as the head. The other dorsal tubercles are about 

 one-quarter as long, not elbowed, and stouter in proportion, while 

 those on the 8th segment are smaller. 



EXPLANATION OF PLATE L 



Fig. I. Heterocampa obliqua /'<?r/J'.— P'leshly hatched larva ; la, dorsal view; 



lb, spine on third, Ic, spine on eiglith, Id, spine on ninth abdominal 



segment ; le, prothoracic horns of stage I, enlarged. 

 Fig. II. Heterocampa obliqua Pack. — Stage II ; Ha, horns on first prothoracic 



segment. 

 Fig. III. Heterocampa guttivitta Walk. — Horns in stage I ; <?, prothoracic horn ; 



b, one on second abdominal, c, one on third to fifth, and d, on ninth 



abdominal segment. 



