May, '08] ENTOMOLOGICAL NEWS. 223 



of front, pectus, pleurae somewhat, dorsulum, metanotum and posterior 

 face of metathorax sericeous ; wings hyaline, at extreme apical margin 

 dusky; nervures dark brown. 



Habitat. Boulder, Colo., Aug. 30, 1907 (S. A. Rohwer). 



Dedicated to Mr. W. J. Fox who has done so much to make 

 North American Larridae known. 



In Fox's table (N. Am. Larridse) this species runs to T. 

 acntus Patt. (Conn., Ga., Fla.), but differs in the following 

 points : occiput not emarginate when viewed from behind ; 

 front with distinct punctures ; metapleurse punctured ; pygid- 

 ium not more than twice as long as broad at base ; apex of 

 abdomen red, etc. It has much the general appearance of 

 T. tcnninatns Sm. but differs greatly in sculpture. It is. not 

 T. claronis Vier. (Tr. Am. Ent. Soc., 1906) which is an ally 

 of T. terminatus Sm. 



Tachyspex foxii var. alpestris n. var. 



$ . Differs from T. foxii in having the front more densely and finely 

 punctured; the dorsulum more closely punctured; the two apical joints 

 of the tarsi rufous; the metanotum with a little more gray hair; and 

 is a trifle smaller. 



Habitat. Florissant, Colo., July I, 1906 (S. A. Rohwer). 



This variety comes nearer T. terminatus Sm. but is still 

 quite distinct. It runs in Fox's table (N. Am. Larridae) to 

 T. acntus Patt. 



Tachysphex parvulus Cress. 



A $ collected at Florissant, Colo., June 15, 1907 (S. A. 

 Rohwer), differs from the description of this species given 

 by Mr. Fox (N. Am. Larridse) as follows: First joint of 

 tarsi reddish; the three apical segments and apical half of 

 third black; base of first abdominal segment black; pubescence 

 of face a trifle yellowish ; tegulse ferruginous ; venation pale 

 brown ; length 5 mm. 



Tachysphex aethiops Cress. 



9 Copeland Park, Boulder Co., Colo., September 6, 1907; 

 N. Boulder Creek, Boulder Co., Colo., August 22, 1907. Can- 

 adian Zone. Both specimens taken by S. A. Rohwer. 



