124 NEW YORK STATE MUSEUM 



Head large, face very long with a large, evenly rounded labrum ; 

 mandibles stout, bidentate, tipped with dark brown or black, and 

 with black at the extreme base; clypeal fossae black and almost 

 connected with the base of the mandibles by black impressed 

 lines; antennae shorter than the body, stout and with the first 

 joint of the flagellum much longer and more slender than the 

 second; antennal fossae ringed with black and with a conspicu- 

 ous, impressed, black area above ; eyes rather small, distant from 

 the base of the mandibles ; ocelli glassy or black, the two lateral 

 distant from the eyes and each connected therewith by a deep, 

 impressed, black line. Thorax glassy with deeply impressed, jet- 

 black sutures; mesothorax highly convex; scutellum and post- 

 scutellum prominent; metathorax smoothly rounded and with 

 no well developed carinae. Wings distinctly f ulvo-f erruginous ; 

 cubitodiscoidal nervure uniformly arching, not append! culate ; 

 first recurrent nervure less than one fourth the length of the 

 second; bulla of the second recurrent nervure close to the cubito- 

 discoidal nervure, and that of the latter distant from the second 

 discoidal nervure by one half its length. Legs uniformly fer- 

 ruginous, except the trochanter segments which are black at their 

 base; claws pectinate; abdomen strongly compressed, first seg- 

 ment slender and gradually enlarging at its apical fourth. 



Genophion coloradensis n. sp. 

 This is a small form having somewhat the general appearance 

 of O. tityri Pack., but differing from it in a number of par- 

 ticulars. It is described from two female specimens in the col- 

 lection of the United States National Museum. 



Description. Ferruginous with the thoracic sutures black, wings 

 tinged with fulvous, wing spread 20 mm, length 9 mm. 



Head medium; face long; mandibles bidentate, tipped with 

 dark brown or black; clypeal fossae deep, dark brown; antennae 

 about as long as the body, the fossae at their bases well marked 

 and ringed with dark brown. Eyes medium, distant from the 

 mandibles. Ocelli glassy or black, nearly contiguous, distant 

 from the eyes ; thorax sericeous, with black sutures ; mesothorax 

 convex; scutellum and postscutellum prominent. Metathorax 

 with three well developed carinae, one dorsal, two lateral, radi- 

 ating from the insertion of the first abdominal segment. Wings 

 subhyaline, with a distinct fulvous tinge, specially on the hind 

 wings. Cubitodiscoidal vein variably appendiculate (in one only 

 a notch and in the other well marked) ; first recurrent nervure 

 less than one half the length of the second ; bulla of second recur- 

 rent nervure near cubitodiscoidal nervure, that of the latter at 



