196 WILLIAM J. FOX. 



dorsulum more distinctly punctured than the vertex, but less so than the front; 

 pronotum at the sides with a small, blunt prominence, which, however, does not 

 alter its appearance to any extent; middle segment with scarcely any trace of 

 an enclosure, the medial impressed line, however, distinct, lateral ridges of pos- 

 terior face short and becoming obsolete above and their lateral furrow absent ; 

 abdomen as usual in the members of this group. Black : scape in front and base 

 of hind tibipe, yellow; clypeus, cheeks and sides of thorax with silvery pubes- 

 cence; legs with a silvery sericeous pile; wings subhyaline, iridescent, a slightly 

 darker cloud in the marginal and submargiual cells, nervures and stigma black, 

 recurrent vein received by the subraarginal cell beyond the middle. Length 

 7.5-8 mm. 



%. — Medial production of clypeus smaller than in 'rmpressifronx : frontal de- 

 pression deep; space between hind ocelli distinctly less than that between them 

 and the nearest eye-margin ; first joint of flagellum longer than the second ; pro- 

 notum with a transverse impressed line before its apical margin ; fore and medial 

 legs pale testaceous, their femora with a darker stripe, hind tibiie yellow at base, 

 testaceous beyond on inner side ; head and thorax above with ])alc pubescence. 

 Length 5.r>-6 mm. 



Canada (Harrinuton) ; Moiitaua ; Virginia. The western speci- 

 mens are the smallest, but otherwise agree with the eastern speci- 

 mens. In the original description of this species the anterniie are 

 said to be entirely black, but in a series of seven specimens but one 

 has not the scape marked with yellowish. 



84. C'rabro iiigror n. sp. 



9 .—Clyiieus distinctly carinated, its fore margin in the middle rounded out ; 

 head with fine, distinct, punctures, somewhat stronger on front : space between 

 hind ocelli about equal to that between them and the nearest eye-margin ; 

 frontal depression and impressed line as in the preceding species; first joint 

 of flagellum scarcely one-quarter longer than the second ; pronotum with a 

 transverse impression or furrow before its hind margin, its punctuation, as well 

 as that of the dorsulum, a little more distinct than that of the vertex; lines 

 forming the enclosure of middle segment wide and deep, narrower, however, 

 than those in cinctipes, the smooth areas, therefore, larger and more distinct, 

 bordering the enclosure laterally, is a tolerably smooth space, which narrows 

 toward base of metathorax, and is bounded outwardly by a strong, coarsely 

 sculptured furrow, which extends down to the apex of middle segment just 

 outside the lateral ridges of the posterior face, the latter with some trans- 

 verse rugge apically ; middle and hind tibiae tolerably well armed with spines ; 

 wings subhyaline, strongly iridescent, nervures and stigma brownish ; first two 

 dorsal segments of abdomen impunctate, the remainder microscopically punctured ; 

 pygidium as usual. Black ; mandibles at apex, tegulje and apex of abdomen, 

 reddish testaceous; tarsi testaceous ; clypeus with dense silvery pubescence, that 

 on the cheeks and thorax on sides and beneath, sparse ; legs with silvery sericeous 

 pile. Length 5 mm. 



New Hampshire. One specimen. The absence of transverse im- 

 pressed line on prouoiuin, greater sj^ace between hind ocelli, clearer 



