62 ENTOMOLOGICAL NEWS. [Feb., 'l6 



(lovelli Vier.). Ncohalict aides Vier. cannot be separated from 

 Parahalict aides, the type of the former (mounts) being closely 

 related to that of the latter (campaniilae.). 



The following table separates the known species. Halic- 

 toides oryx Viereck is confirmed as a valid species by the dis- 

 covery of the female. I find I have a female taken by Mr. S. 

 A. Rohwer in the Canadian Zone on North Boulder Creek, 

 Colorado, at flowers of Grind clia erecta, Aug. 21, 1907. It is 

 larger than H. tinslcyi, and is readily separated by the distinct- 

 ly green mesothorax, and greenish tints on middle of ab- 

 domen. The head is very broad, and the mesothorax very 

 hairy. 



Stigma clear amber color ; wings perfectly hyaline i 



Stigma dusky or dark ; wings usually brownish, or at least not quite 

 clear 2 



1. Area of metathorax dull, minutely sculptured (late summer and 



autumn species) marginatus Cress. 



Area of metathorax shining (spring species) . .fulchricornis n. sp. 



2. Face narrow, facial quadrangle conspicuously longer than broad, 



(species of N. E. States) noracangliac Rob. 



Face not thus narrow, usually quite broad, (species of W. States). 3 



3. Face covered with stiff black hairs, especially dense and abundant 



between antennae maurus Cress. 



Face not thus covered with black hair 4 



4. Mandibles with an extremely long curled tuft of tawny hair beneath ; 



hind tibiae fringed with extremely long white hair, (S. 



Calif.) davidsoni Ckll., $ 



Mandibles with no such tuft 5 



5. Middle basitarsi expanded into a large flat lamina (S. 



Calif.) rirgatus Ckll., $ 



Middle basitarsi not thus modified 6 



6. Hind tibiae enormous, claviform; hind tarsi very short, the basi- 



tarsi expanded into a flat lamina (S. Calif.) . .mulleri Ckll., $ 

 Hind legs not thus modified 7 



7. Male abdomen with a large tuft of dark fuscous hair subapically 



beneath, (species from Washington State, allied to 



mounts) cawpanulac Ckll. 



Male abdomen without such a dark tuft 8 



8. Males ; clypeus densely covered with long hair 9 



Females 



