TEXAN HYMENOPTERA. 189 



Four specimens. (Belfrage.) Differs from (jraphicus by the yel- 

 low scape, hyaline wings, unicolorous legs, and more finely aciculated 

 abdomen; and from mandlbularis by the much smaller head and 

 mandibles and paler wings. 



^ Rogas delicatus, n. sp. 



•^ . — Uniform pale yellowish-testaceous, clothed with a whitish pube- 

 scence j head broad, mandibles rather large, black at tips; antennae as long as 

 head and thorax, apical half pale fuscous; mesothorax even, lines scarcely 

 impressed; metathorax rounded above, feebly sculptured; wings hyaline, 

 iridescent, nervures pale luteous, apical half of stigma blackish, second cubital 

 cell short; legs rather short, subrobust, terminal joint of tarsi black ; first and 

 second abdominal segments very minutely and longitudinally aciculated, with 

 a distinct central carina, apex of second and the remaining segments smooth 

 and polished. Length .20 inch. 



Two specimens. (Belfrage.) A very delicately colored species. 



-^ RogB!^ pilosus, n. sp. 



9. — Robust, clothed with a short, rather dense, erect, white pubescence; 

 head and thorax ferruginous; antennae except scape beneath, black; metatho- 

 rax short, broad, rather abrupt behind, rugulose, base above blackish; wings 

 pale fuliginous, subhyaline at tips, stigma black, yellow at base, second cubital 

 cell shorter than usual, quadrate; legs honey-yellow, tips of posterior femora 

 and of their tibiae, and the tarsi, more or less blackish ; abdomen broad, con- 

 vex, honey-yellow, shaped much as in Rhitigaster, with the segments not 

 coalite, rough with confluent punctures, three basal segments about equal in 

 length, fourth segment broadly rounded at apex ; venter deeply vaulted as in 

 Ehitigaster. Length .17 inch. 



Two specimens. (Belfrage.) A remarkable species, having all the 

 characters of a Eogas, except the abdomen which is very similar 

 in shape to that of Rhitigaster. 



-( Rogas intermedium. 



Aleiodes intermedins, Cress. Trans. Am. Eut. Soc. iii., p. 380. 

 Several specimens. (Belfrage.) Varies much in color. 



^- Exothecus atriventris, n. sp. 



9. — Opaque; head, pro- and mesothorax, tegulse, scutellum and legs 

 ferruginous; pleura, metathorax and abdomen black; head very full behind 

 the eyes, cheeks smooth and shining, occiput finely and transversely acicu- 

 lated, face rugulose; antennae ferruginous, dusky at tips, rather longer than 

 head and thorax; mesothorax with crenulated sutures, median lobe gibbous, 

 truncated anteriorly ; scutellum flat, polished ; pleura dull rufous, sides lonjji- 

 tudinally rugulose, smooth and polished beneath, with a deep central groove; 

 metathorax densely rugose; wings narrow, subhyaline varied with pale fuligi- 

 nous, stigma black, pale at base; femora robust, trochanters and tarsi paler: 

 abdomen as long as head and thorax, thickened and polished at tip, first and 

 baaal half of second segment opaque, covered with dense longitudinal stri:e, 

 each with two distant longitudinal carinae at base, those on first segment cuu- 



