

July, '09] ENTOMOLOGICAL NEWS. 289 



Description of Larva and Pupa of Tipula 

 trivittata Say. 



By Chas. T. Greene, Philadelphia, Pa. 



(Plate XII) 



While collecting in a stump of oak at Glenside, Pa., March 

 30, 1908, I found two dipterous larvae about an inch or two 

 beneath the bark, where the decayed wood was soft and damp. 



The larva, Fig. 2, was about 32 mm. long when fully ex- 

 tended and translucent, yellowish brown in color and with two 

 longitudinal white stripes on the dorsal side. The head, man- 

 dibles and antennae were black. 



By carefully watching the larva I made the following ob- 

 servations : It moved by expanding and contracting the body 

 and propelling itself by the ventral side of the last segment. 

 The last segment had four appendages, the two larger ones 

 being slightly above the smaller pair, but as the larva moved 

 it kept all four entirely free from the surface on which it 

 moved. 



Fig. 3 is a ventral view of the last segment. 



The larva pupated between April 15-17, 1908 in the decayed 

 wood. 



