188 E. T. CRESSON. 



opiiqne, minutely sculptured, central transverse line on second segment deep 

 and subsinuate, basal middle sometimes blackish; ovipositor as long as body. 

 Length .10— .16 inch. 



Six specimens. (Belfrage.) Smaller than the specimens collected 

 in Colorado, with the pleura entirely black beneath. 



^\ Rogas f cxaniis. 



Ahiodes texanus. Cress. Trans. Am. Ent. Soc- iii., p. 378. 

 One specimen from Comal Co. 



+ Ro«;a<« nioIe<^tiis, n. sp. 



9.— Pale ferruginous, finely punctured, with a short fine pale pube- 

 scence; head, palpi, antennae, metathorax except base and apex, most of 

 pleura, and the legs except coxae, black ,• metathorax finely reticulated, with a 

 central and a lateral longitudinal carina; wings hyaline, uervures black; ab- 

 domen longitudinally rugose, with a central ca.rina extending from base of first 

 segment nearly to the middle of the third; basal half of third segment longi- 

 tudinalh'^ aciculated, apical half and remaining segments smooth and polished. 

 Length .25 inch. 



One specimen. (Coll. Gr. W. Belfrage.) Allied to parasiticus, 

 Norton, but differs by the black legs and unicolorous abdomen. 



Rogas grapliicns, n. sp. 



%. — Uniformly honey-yellow, clothed with a short whitish pubescence; 

 spot enclosed by ocelli, tips of mandibles, palpi, antenna entirely, four anterior 

 femora except base, tips of posterior pair and all the tibiae and tarsi black; 

 metathorax rounded, feebly sculptured, with a sharp central longitudinal 

 carina; wings fuliginous, nervures and stigma black; abdomen opaque, sub- 

 sericeous, coarsely longitudinally aciculated, the first three segments with a 

 well-defined central longitudinal carina, becoming obsolete before reaching 

 apex of third segment, apical segments almost smooth, shining. Length .35 in. 

 Two specimens. (Belfrage.) 



^ Rogas niandibularis, n. sp. 



%. — Uniformly honey-yollo\c, clothed with a short whitish pubescence; 

 head large, transversely subquadrate, buceate ; mandibles large, protruding, 

 the oval orifice very large; face transversely striated, prominent medially; 

 spot enclosed by ocelli, tips of mandibles, palpi, antennae entirely and tips of 

 tarsal joints black or blackish; thorax as in graphicus ; wings subhyaline, 

 slightly dusky, stigma black; legs rather robust, especially posterior tarsi 

 which are shorter than usual, all the tarsi more or less obfuscated; abdomen 

 as in graphicus, except that it is much more finely sculptured, apex of third 

 and the remaining segments smooth and polished. Length .35 inch. 

 One specimen. (Coll. (}. W. Belfrage.) 



A Rogas atricornis, n. sp. 



9 . — Uniformly honey-yellow, clothed with a very short whitish pubescence ; 

 tips of mandibles and antennae except scape, black; thorax and abdomen as in 

 mandlbularis ; wings hyaline, stigma fuscous, very pale at base; tips of tarsi 

 dusky. Length .30— .33 inch. 



