210 Illinois State Laboratory of Natural History. 



Inner pair of upper teeth black posteriorly, 



lower teeth blackish at base and apex 



above. [Fig. 37, 39.1 

 Black line of outer teeth nearly reaching 



apex; lower teeth not blackish margined. 



[Fig. 37] Tijpula sp. (e). 



Black line of outer teeth not extending beyond 



middle; lower teeth blackish margined. 



[Fig. 39] Pachyrhina fenrnginea. 



Inner pair of teeth longer than outer pair, entirely 

 black, smooth, slender and hook-like, with 

 sharp recurved points; stigmata distant; 

 lower teeth with a short black line. Larva {f). 



PUP^ OF TIPULINjE. 



The pupa of Tipula eluta [Fig. 34] has a pair of 

 spinous teeth beneath in front of the usual row. In 

 Tipula sp. e the ventral row on the fourth abdominal is 

 complete at middle, as on the segments which follow, 

 but in another species and in Pachyrhina ferruginea 

 this row is interrupted at middle behind the tips of the 

 tarsi. 



Tipula eluta Loew. [Fig. 32-34.] 



On the clean sandy shore at Station C, we noted 

 March 10 an occasional tiny ridge near the margin, like 

 a miniature mole-hill. Such raised lines are due to the 

 burrowing of various aquatic species, but in this in- 

 stance each was traced to a plump grayish larva [Fig, 

 32] looking much like the Tipula larvae found in gi-ass 

 lands. These larvae were again seen April 14 and 18, 

 being moderately common on shore under high water 

 drift, in rubbish near the margin, and among the floating 

 vegetation along shore. They were pupating at the 

 latter date, and imagos were obtained May 4. Young 

 larvae were abundant late in May and the older larvae 



