Vol. XXX ! ENTOMOLOGICAL NEWS. I3I 



The cases are found on the under side of leaves of Aster 

 shortii Lindl. The nearly full-grown larvae with mature cases 

 feed on the lower leaves near the ground in early spring. The 

 mature case is about lo mm. long, cylindrical, with mouth 

 slightly deflexed and with two-valved slightly expanded apex. 

 It is spun of brownish red silk, paler toward apex, with a dark 

 brown granular spot on the upper side beneath the mouth. The 

 larvae continue to feed until the middle of May, and produce 

 moths from June 2 to July 10. Eleven specimens reared; two 

 captured. 



Leaves mined by the larva before constructing its first case, 

 were collected in the latter part of June. This mine is irregular, 

 sometimes trapezoidal in shape, and is several times the area 

 of the first few mines made after the larva spins its minute 

 case, which is covered closely toward apex with the black 

 frass taken from the mine. These mines extend in a curve 

 across the leaf, gradually increasing in size. The case is 

 gradually elongated at apex and mouth and increased in diame- 

 ter by the splitting open and filling in of the under surface 

 with silk. These additions are pale gray at first, later becom- 

 ing reddish, and the original frass-covered case forms the dark 

 brown patch on the upper side of the mature case. During 

 late summer and fall, the larvae mine the small leaves up 

 amongst the inflorescence. 



The imagos of this species, particularly the paler specimens, 

 are only with difficulty distinguished from those of C. vcrnoni- 

 aeella Chambers, in which the position and course of the mark- 

 ings are practically the same. The latter species is larger and 

 paler, w^th the outer margin mostly white, instead of ocher- 

 ous. ^^^ 



Collecting the Larvae of Tabanus and Chrysops (Dip.). 



By Werner Marciiand. 



(From the Department of Animal Pathology of The Rockefeller Insti- 

 tute for Medical Research, Princeton, New Jersey.) 



While the larvae of mosquitoes and many other Diptera 



Nematocera are comparatively well known, as they are aquatic 



in habitat, and while the larvae of many Brachycera have been 



