190 THE CANADIAN ENTOMOLOGIST. 



black central setse surrounded by a ring of 4-5 small white ones ; on 

 thoracic segments III bears merely 1-2 black setae. The lateral tubercles 

 bear one long central black seta, the remaining ones being smaller and 

 white. The thoracic plate shows four slightly raised darker areas, two 

 anterior and two posterior, each bearing the black setae. All legs the 

 colour of the body. Length 4.8 mm. 



Euchcbtias spraguei Grt. 



Ova sent by Mr. Kwiat of Chicago in June hatched during trans- 

 mission, the young larvae eating the egg shells. From a rather crushed 

 unfertile egg following note was made. 



Ovum. — Hemispherical, with flat base ; pitted with numerous slight 

 punctures ; pale orange-yellow. Diameter .4 mm. 



Stage I. — Head black, with sparse black setse. Body pale red-brown 

 with large black almond- or kidney-shaped tubercles ; arrangement of setae 

 typically Arctian ; tubercle I about half as large as II, with short black 

 seta; seta of II black, longest on ist and last two abdominal segments; 

 III with black setae ; lateral setae short and white; thoracic plate semilun- 

 ate with 4 setae on anterior margin. When at rest the first two abdominal 

 segments appear slightly humped. Length 3 mm. 



Stage II. — Head pale yellowish ; body red-brown, becoming later 

 yellowish ; tubercles black, II and III being the largest ; tubercle I with 

 two long black setae and a couple of short white ones inclined towards the 

 head ; II with about 8 black setae ; III with 6 ; IV small, situated 

 immediately posterior to the spiracle and bearing two setae ; V with 5-6 

 setae of which the central one is black, the remainder white ; VII larger 

 with 2 central black and 8-10 white basal setae ; spiracle pale with black 

 rim. Length 6 mm. 



Stage III. — Head and body pale orange yellow ; tubercles blackish 

 arising out of a pale base and with numerous long plumed gray hairs ; 

 traces of a pale subdorsal line and lighter shading laterally around tubercle 

 V. Length 13 mm. 



Stage IV. — Head, body and legs pale orange with traces of a pale 

 yellow subdorsal and a similarly coloured subspiracular line : tubercles 

 black, giving rise to numerous long, silky, plumed, dark gray hairs, which 

 form a thick covering over the body. Length 20 mm. 



Stage V. — Head pale reddish ; body dorsally pale green, shading into 

 pale orange laterally ; traces of a dark dorsal line and the pale subspiracular 

 line of the previous stage; tubercles pale; base of hair black; body thickly 



