208 AMERICAN HYMENOPTERA. 



and witli a slight, broad lougitudinal median depression. The pronotum sculp- 

 tured in much the same way as the dorsulum and with a median longitudinal 

 rather deep narrow groove. Metathorax granulated, and in other respects much 

 the same as in plenoeuloides, but instead of an impressed median longitudinal line 

 on the dorsal aspect there is a raised line, and approximately half way between 

 this raised line and the lateral margin there is a shallow, lougitudinal groove 

 parallel to the raised line. 



Tarsal claws as in plenoeuloides, abdomen as in plenocidoides, but the last dorsal 

 segment with a rather indistinct pygidium. 



Wings as in plenocxdoides. 



Color. — Head and thorax black, excepting the apex of the clypeus, the mandi- 

 bles and the tarsi which are more or less brownish. 



Abdomen reddish castaneous, tibial spurs whitish. Wings brownish. Nervures 

 very dark brown. Covered all over by appressed and more or less erect silvery 

 pubescence, which in no place obscures the sculpture. 



Type. — University of Kansas. 



Type locality. — Hamilton Co., Kansas, 3350 ft. 



One female collected by F. H. Snow. 



Ancistroiiia vegetoides n. sp. 



9 . — 12 mm. — Very like vegeta. Front with a median shallow longitudinal sul- 

 cus extending from the anterior ocellus to the slight eminence between the inser- 

 tion of the antennae, which is more finely punctured than the front in the mid- 

 dle. Space between the eyes at top a little greater than half the space between 

 the eyes at base of clypeus. Third joint of the antennge a little longer than the 

 fourth and approximately as long as the fifth. 



Dorsum with the punctures so close that they appear indistinct, and nowhere 

 are they at all sparse. Scutellum is slightly impressed in the middle, longitudi- 

 nally and more coarsely punctured than the dorsulum. Metathorax as in vegeta. 

 Legs and abdomen also as in vegeta. 



Color. — Almost entirely black. The apical joint of tarsi brownish. Marginal 

 cell at apex forming an acute angle. Wings dark fuscous, with black nervures 

 and stigma. The insect appearing bare, but on close inspection is seen to have 

 an exceedingly short pubescence, which gives the abdominal segments a steel- 

 colored cast. 



Type. — University of Kansas. 



Type locality. — Clark Co., 1962 ft., Kansas. 



One female collected in June, by F. H. Snow. 



Ancistroniina zerbeii. 



In color nearly like chilopsidus, from which it differs decidedly in 

 structure and sculpture. 



9. — 12 mm. — Anterior margin of the clypeus almost regularly rounded. 

 Neither emarginate nor dentate. Clypeus with distinct deep punctures that are 

 one to three puncture widths apart. Immediately above the clypeus between 



