TEXAN HYMENOPTERA. 189 



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

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

 abdomen; and from mandibularis by the much smaller head and 

 mandibles and paler wings. 



Rogas delieatus, n. sp. 



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

 scence ; 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. 



Rogas 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 Rhiligaster, 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 

 Rhitigaster. Length .17 inch. 



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

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

 in shape to that of Rhitigaster. 



Rogas intermedium. 



Aleiodes intermedius, Cress. Trans. Am. Ent. Soc. Hi., p. 380. 

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



Exotheeus atriventris, n. sp. 



9. — Opaque; head, pro- and mesothorax, tegulae, 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; antennas 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 longi- 

 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 

 basal half of second segment opaque, covered with dense longitudinal strias, 

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



