112 THE CANADIAN ENTOMOLOGIST. 



red, distal half of third joint black, angle prominent. Thorax black with 

 four gray lines : humerus reddish-brown ; pleurae and pectus gray with 

 white hairs. Abdomen black with two rows of triangles on segments one 

 to five, a faint dorsal brownish stripe and a little expansion of the white 

 hind margins on four and five. Venter brownish-yellow. Femurs black 

 with white hairs, brown at the' tips ; tibiae brown, darker towards the, tips ; 

 tarsi black. Wings hyaline, faint clouds on the bifurcation of third vein 

 and middle cross vein. 

 From Montana. 



ON THE EARLY STAGES OF THE DIPTEROUS FLY, 

 CHRYSOPILA FOLDA, Loew. 



BY D. W. COljUILLETT, WOODSTOCK, ILL. 



Larva. — Body polished, yellowish white, nearly cylindrical, anterior 

 part tapers to the head ; eleven visible segments : footless ; posterior 

 end of last segment deeply notched horizontally and less deeply so verti- 

 cally ; on each side a small notch above sinus of horizontal notch ; on 

 under side of each of the two lobes, formed by the horizontal and vertical 

 notches, is an elliptical, reddish-brown raised spot ; on under side of last 

 segment, near the anterior end, is a somewhat conical impressed spot, the 

 base of the cone being at the anterior end of the segment ; in the middle 

 of this cone is a longitudinal impressed line ; length from 20 to 25 mm. 



Pupa. — Cylindrical, of about the same width throughout ; dark brown ; 

 on each of tlie six segments, anterior to the last one, is a transverse ridge, 

 armed with minute points \ last segment somewhat truncated behind, and 

 armed with a few small points, two of which are placed side by side on 

 the ventral side, and these points diverge from each other ; on the front 

 of the head are four very small warts, and at the junction "of the head and 

 thorax is a transverse row of six small warts, the second from each end 

 being larger than any of the others ; spiracles in the form of rough warts, 

 one pair to each of the last eight segments, except the last one ; leg-cases 

 reach to the anterior third of the seventh segment, counting from the hind 

 end of the body ; wing-cases reach to the anterior end of the above seg- 

 ment; length about t6 mm. 



The larvae from which the above description was drawn were found 



