THE CANADIAN ENTOMOLOGIST 55 



III three hairs and on the other segments two hairs; on abdominal segments V 

 and VI it is reduced to a mere point with a single short, white, clubbed hair, 

 noticeably distinct from the other setae. 



Verruca II bears about ten hairs normally but on V and VI it is smaller 

 with fewer hairs and in consequence more of the pale color of the integument 

 is apparent; on these same segments it also bears 2-3 clubbed white hairs in close 

 proximity to that of verruca I. Laterally a large, oblong verruca (tubercles 

 III and IV) is present with the brown spiracle situated on its \entral edge; it 

 bears numerous hairs, including a single long black one. Below it is a further 

 smaller verruca clothed with short whitish hair and with one long white seta. 

 Above the prolegs a small verruca with several short white hairs. Rear segment 

 with four, large, equally spaced verrucae containing several long, backward- 

 directed setae. Prolegs with two anterior and two posterior crotchets. Length 

 on emergence 2 mm. 



Stage II. — Head as before; body light gray with slight purple-brown dorsal 

 sprinkling behind verrucae and heavy lateral sprinkling of same color; faint 

 yellow shading on meso- and meta-thorax especially intersegmentally and also 

 laterally along all segments below spiracle. \'errucae much as before but paler; 

 from the large prothoracic wart arises a small tuft of short plumes as well as the 

 bristles; verruca I on abdominal segments I and II with similar black plumed 

 hairs and merely one or two bristles; verruca I and also II on segment VIII with 

 a few black plumes on inner edge; otherwise the bristles from verrucae are long 

 and mostly black; abdominal segment V with yellow dorsal shading and \\ and 

 VII dorsally with large circular yellow-orange eversible glands. 



Stage III. — ^Head pale brownish. Body with grayish-white ground colour; 

 dorsally the segments are shaded with dark brown forming a narrow dorsal 

 line on thoracic segments and broadening out on abdominal to a band of dark 

 color strongly broken with the pale ground colour and extending laterally to the 

 lower edge of verruca II. Posterior portion of thoracic segments shaded with 

 yellow-orange and the whole dorsum of abdominal segment V anterior to tuber- 

 cles rather bright orange; glands on VI and VII bright coral-red. A broad 

 bfoken band of dark brown laterally crossing verruca III, the verruca itself 

 being encircled with pale ground color and with a patch of the same color behind 

 it so that the edges alone of the dark band appear more or less continuous; a 

 somewhat broken pale yellow subspiracular line below which the brown shading 

 is predominant again. Verrucae rather pale except I and II on abdominal 

 segments I-IV which are dark (blackish) and form a a marked contrast to others 

 which are slightly yellow tinged; short black pencils of feathered hair laterally 

 from the large prothoracic wart; dorsal black hair pencils on abdominal segments 

 I, II and VIII with very slight tufts of white plumed hairs on III and IV arising 

 from verruca I. Of the barbed hairs the long ones are black, the others white, 

 mostly all being longer than the hair pencils. Prolegs shaded basally and centrally 

 with dark brown. Prothoracic plate tinged with yellowish. Not much increase 

 in number of barbed hairs. 



Stage IV. — ^Head black; clypeus and mouth parts whitish; overhung by 

 white hairs arising from prothoracic plate. Body light gray tinged anteriorly 

 with yellow; a dark, blackish dorsal stripe on mesc- and meta-thorax broadening 

 into a more or less solid band of black on abdominal segments with segment V 



