204 Journal New York Entomological Society, t^oi. xxiii, 



From this data we may assume that the species is on the wing from 

 early June until the middle of August. 



Description of Larva, Pupa and Case. 



Larva.— Length when mature 17-20 mm.; breadth about 4.5 mm. 



The Head. — The dorsal markings are shown in pi. 15, fig. 6; on 

 the sides the head is light brown mottled with dark brown or black 

 in the region behind the eye, as is partly shown in the figure ; the 

 venter is light brown in front, becoming darker toward the hind mar- 

 gin. The labrum is shown in pi. 16, fig. 14; the frons in pi. 16, fig. 

 22, and the labium and maxilhe, in part, in pi. 16, fig. 19. 



The Thorax.— The dorsal markings and distribution of the prin- 

 cipal setigerous punctures are shown in pi. 15, fig 6; on the sides, 

 above each coxa, there is a dark chitinous plate bearing a group of 

 setas near its front margin, the venter is uniform in color. The 

 " horn " on the ventral side of the prothorax is slender and evenly 

 curved forward. The legs are dark brown, margined and mottled 

 with dark brown and black. 



The Abdomen. — The first segment is darker in color than the suc- 

 ceeding segments, it is armed with a few set^e in the region of the 

 humps and on its ventral surface ; segments two to seven bear a few 

 minute setse; segment eight is bordered along its hind dorsal region 

 by a dark area which bears a row of about six setae ; segment nine 

 curves sharply downward and is darker in color than segments two 

 to eight, it bears a dorsal chitinous plate which is armed with four 

 large, and several smaller setae; segment ten is also dark in color 

 and bears several strong setae in the region of the drag-hooks ; on the 

 under side of each segment two to seven there is a narrow hairlike 

 mark, oval in shape; the lateral fringe is short and black. The dis- 

 tribution and number of gills on the left side of the body are indi- 

 cated diagrammatically in pi. 16, fig. 15. 



Rupa. — Length 20-22 mm. ; breadth about 5 mm. The antennae 

 extend back to about the hind margin of the seventh segment ; on the 

 dorsal surface of the head, between the antennae, there is a pair of 

 strong setae and on the front surface, midway between the dorsal 

 setae and the labrum, there is a pair of similar setae ; each lobe of 

 the labrum bears a group of stout setae which are curved, but not 

 hooked, at their tips. On the second and third pairs of legs the 



