Entomology of the Illinois River. 219 



and we have collected it four times in Ma^', once in June, 

 once in August (on the 6th), and three times in Sep- 

 tember, in central Illinois. It would therefore seem at 

 least two-brooded. One imago came to a light at night. 



The situation where thev were found at Havana, habits, 

 differences, etc., have already been fully discussed under 

 the preceding species, which it closeh^ resembles in the 

 immature stages. 



Larva [Fig. 39]. — Length 20-25 mm., diameter 3.5-4 

 mm. Transverse line of head above rather narrow, each 

 fold of bod\- with more distinctly darker transverse bar; 

 anal prominence rather small, pair of teeth below stig- 

 mata rather prominent and not very short, above 

 fuscous and margined with black, more strongly on 

 outer margin. Otherwise almost exactly like the pre- 

 ceding species. 



Pupa [Fig. 40].— Length 19-21 mm., diameter 3.5^ 

 mm. Yellowish brown, varied with blackish, wing-pads 

 and legs yellowish brown, former with narrow dark 

 margin, each abdominal posterior division with two or 

 three blackish dots on each side of disk above and be- 

 low; row of spinous teeth of fourth abdominal wanting 

 at middle behind the tarsi, two small teeth remaining 

 on each side, as on the third abdominal. Last segment 

 [Fig. 40] with smaller lateral teeth, four larger dorsal 

 ones about equal in size, terminal cone of female short, 

 scarcely or not at all projecting behind the tips of the 

 posterior pair of dorsal teeth; male with corresponding 

 area protuberant, median line strongly impressed, ter- 

 minal surface broader below, with a sharp recurved spine 

 at the outer inferior angles. Otherwise exactly as in 

 the preceding species. 



Larva (/"). 



A very common species in the light sandy soil of the 

 sand plain at Havana, under the deep layers of dead 

 leaves which accumulate in the woods. Larvae were 

 ■collected May 26 and June 1. 



