EIGHT NEW SPECIES OF REARED ICHNEU^ION-FLIES, 

 WITH NOTES ON SOME OTHER SPECIES. 



By R. A. CusiiMAN, 

 Of the Bureau of Entomology, United States Department of Agriculture. 



The eight new species herein described were all reared by agents of 

 the Bureau of Entomology, and the majority of them are represented 

 by considerable series. The notes on previously described species 

 are included in the hope that they will add something to the defini- 

 tion of the species. They are based on newly reared material. 



Genus MICROCRYPTUS Thomson. 



(CRYPTUS) MICROCRYPTUS OSCULATUS (Provancher). 



A considerable series of what appears to be this species has been 

 reared as a primary parasite from larvae of Ametastegia glahrata 

 (Fallen) by Mr. E. J. Newcomer at Wenatchee, Washington. It is 

 extemely variable in respect to the presence and extent of the white 

 color of the face. One male is very like a male compared with the type 

 by Mr. S. A. Rohwer and said by him to differ from the type only in 

 being somewhat smaller and having on the face a white instead of a 

 piceousspot. In these two specimens the mandibles, palpi, clypeus, a 

 facial spot, and the tegulae are white or whitish. Among the other 

 males, of which there are nine, is exhibited variation in both directions. 

 In the darkest form only the mandibles, clypeus, and tegulae are white. 

 In those of the other extreme the white embraees the palpi, mandi- 

 bles, the whole face below the antennae, the cheeks, a spot on the 

 lower side of the scape, the front and middle coxae and trochanters, 

 the tegulae, and a small humeral spot, and the front edge of the prono- 

 tum shows a tendency toward this color. In the females only the 

 palpi, mandibles, tegulae, and an incomplete antennal annulus 

 embracing more or less of two segments display the white color, and 

 at the dark end of the series it is replaced even there by black or 

 piceous. In all specimens the wing bases are white. 



The females are from 6.5 to 8.5 mm. long and the males 5.5 to 

 8.5 mm. The ovipositor varies slightly in length, averaging some- 

 what more than half as long as the abdomen. 



Proceedings U. S. National Museum. Vol. 53— No. 2216. 



457 



