THE CANADIAN ENTOMOLOGIST. 191 



Typhlopsylla a/pitia, n. sp. 



A very unique flea, collected by Prof. Bruner at Georgetown, Colo., 

 on Mountain Rat. The very conspicuous " bristles " of the head, and 

 anterior cox?e, are short and spine-like, thus differing from those in any 

 other flea I have met with. It is the most well-marked species of the 



genus. 



Typhlopsylla americana, n. sp. 



This seems to be a common species, at least west of the Mississippi. 



I have specimens from Ames, Iowa, taken on Geomys bursarius (Osborn). 



At Fort Collins I have found it on a large brown mole, and Prof. Gillette 



has taken it at the same place on the pocket gopher. Prof. Aldrich sent 



me a specimen taken at Moscow, Idaho, on Thomomys talpoides ; it 



varies from the typical form in having but sixteen spines in the pronotal 



comb, but is otherwise identical. 



(to be continued.) 



DESCRIPTIONS OF THE LARV^ OF CERTAIN 

 TENTHREDINID^. 



BY HARRISON G. DYAR, A.M., NEW YORK. 



Cladius ( T7-ichiocainpiis) gregarius, n. sp. 



Allied to Cladius viminalis. Fallen. The larval habits are also iden- 

 tical, as seen by Dr. J, A. Lintner's account of vimiiialis in his Fourth 

 Report, p. 44 (as Aulacomerus lutescens). The fly, however, is differently 

 coloured ; the larva differs but slightly, in that the lateral black spots are 

 larger than the subdorsal ones, whereas in viminalis the reverse appears 

 to be the case. 



Male. — Basal joint of flagellum of antennte with a projection on its 

 lower side, the succeeding joints somewhat obliquely set, but simple, all 

 densely pilose ; shining black throughout, except the legs, which are pale 

 white outwardly ; coxae, trochanters, base of femora, whole of posterior 

 femora, and all the claws, black. The black colour fades outwardly, be- 

 coming almost sordid, luteous, not sharply separated from the white 

 parts. Basal two-thirds of fore wing and nearly the whole of hind wing 

 dark smoky black ; the veins and stigma black. Length, 6 mm. 

 Female. — Antennae simple, the third and fourth joints slightly enlarged at 

 their tips, scarcely pilose at all ; coloration as in the male, or the wings 

 rather less smoky ; length, 6 mm. There are three submarginal cells, the 

 first obscurely divided near base by an obsolete nervure; lanceolate cell 

 contracted in the middle. 



