402 AMERICAN HYMENOPTERA. 



longer than twice its wifUli at the base, its posterior face appearing sculptureless 

 with rather distinct margins laterally toward the apex; rnetapleura delicately 

 striated ; niesothorax and nietathorax black, excepting the appendages, which 

 are as follows: tegulfc mostly testaceous, margined witli yellow; wings trans- 

 parent, tinted with brownisli testaceous, stigma and nervures mostly brownish 

 testaceous; middle and posterior femora and. their metatarsi yellow, excepting a 

 short brown line on the inner aspect of the middle tibije, and a brown edge on 

 the apical margins of the middle and posterior tibia>, middle and posterior femora 

 tipped with yellow, posterior femora also tipped with brown, excepting the apical 

 tarsal joint, which is brown and practically concolorous with the claws, the tarsi 

 are yellow or yellowish. 



Abdomen. — Quite smooth, with none of the segments noticeably depressed, 

 with a yellow spot on each side of the first dorsal segment; second, third and 

 fourth dorsal segments with a transveise, medially constricted, yellow line on 

 the basal half; greater portion of the fifth dorsal segment yellow; a yellow spot 

 on each side of the sixth dorsal and corresponding ventral segment. 



Pubescence. — Eather long, thin and silvery, except on the apical abdominal seg- 

 ment, where it is somewhat yellowish. 



Type. — University of Kansas. 



Type locality. — Thomas' Ranch, 6000 ft., Oak Creek Canon, 20 

 miles southwest of Flagstaff, Coconino Co., Arizona. 



Taken in August by F. H. Snow. One female with head and 

 prothorax missing. 



C'rabro canonicola n. sp. 



Related to Maculipennis, from which it differs in the characters 

 here described; mostly black, with yellow markings; pubescence 

 inconspicuous, with a golden tint; abdomen, especially the second 

 segment, distinctly punctured, its dorsal segments, excepting the 

 apical one, banded with yellow. 



9- — 10 mm — Head. — Very as in confertus, its scrobe forming an almost acute 

 angled triangle, with the base nearly half as great as the altitude, and tangent 

 to an imaginary straight line, which latter is in turn tangent to the anteiior 

 margin of the posterior ocelli, outer side of scrobe almost adjoining and parallel 

 to the inner eye margin ; the following parts are yellow ; scape, part of pedicel, 

 greater part of clypeus and mandibles, except their brownish tips. 



Thorax. — Pronotuni quite as in veiitralis, doTS\i]nm more closely punctured than 

 the vertex and duller, scutel polished with its punctures more separated than 

 those on the dorsulum, episternal suture of mesopleura not conspicuously foveo- 

 late, base of mefcmotal enclosure nearly as in maculipennis, its central furrow 

 nearly quadrate, shining and nigulose, the ovoid polished spaces of the metanotum 

 surrounded by a foveolate furrow, the posterior aspect of the nietathorax uni- 

 formly smooth and shining, separated from the rnetapleura by a slender ridge, 

 the following parts are yellow: tibiae almost completely, except for the brown 

 tips, pronotuni, tubercles, episteinum niesopleuralis. anterior and posterior edges 

 of the teguUe, greater portion of the scutel, a spot on each side of thorax directly 



