164 WILLIAM J. FOX. 



less strongly and transversely striated, the strength of the lateral ridges gradually 

 diminishing toward the upper surface, sides somewhat coriaceous. Black ; man- 

 dibles and clypeus except their apices, scape, pedicellum in part, pronotuni, tuber- 

 cles, scutellum, nietanotum, tips of femora, tibiie, except a spot within, fii-st joint 

 of tarsi, band on first abdominal segment, large spots on second and third barely 

 touching within, band on fourth and fifth and irregular spots on ventrals 2-5, 

 those on segment 2 largest and sometimes touching, whitish ; wings pale subhya- 

 line, dusky at apex, nervures and stigma pale testaceous ; pubescence of head 

 and thorax whitish silvery in the usual situations. Length 8-10 mm. 



'^ . — Head coareely and closely punctured, the cheeks striated as in aniKs. but 

 indistinctly, strongly depressed, though but slightly produced posteriorly, appar- 

 ently not ridged beneath ; anterior margin of clypeus strongly dentate laterally, 

 emarginate medially or incurved ; flagellura broadest at about the fourth .joint, 

 narrowed from that point to the apex, first joint broadened to meet the se(U)nd, 

 with a prominent bunch of pale hairs beneath, four apical joints about as long as 

 the four preceding ones united ; thorax more coarsely sculptured than in the 9 • 

 the prouotal teeth stronger ; first joint of medial tarsi scarcely longer than the 

 remaining joints united ; fore femoi'a in shape triangular, about two-thirds as 

 broad at base as they are long ; tibial shield shaped as in argns, but larger, and 

 the outer edge more strongly sinuated, in color outer half greenish white, streaked 

 and dotted blackish, remainder dark bi'own ; colored like the 9 > with the fore 

 femora, all the coxse and trochanters more or less, and medial legs entirely whitish ; 

 mesosternura with dense, white pubescence. Length 9-10 mm. 



Montana. 



39. Crabro iequalis n. sp. 



9 . — Head finely and closely punctured, iu front with a delicate .^triation ; space 

 between hind ocelli about equal to or slightly greater than the space between 

 them and the nearest eye-margin ; space between eyes at base of clypeus less than 

 the width of the latter in the middle, much narrower than in argus ; anterior 

 margin of cly]3eus slightly sinuous, lateral angles not dentate ; firet joint of fla- 

 gellum about as long as the two following united : prouotum not strongly ridged 

 anteriorly, but strongly dentate at the sides; dorsulum with fine, even, tolerably 

 close punctures, those on mesopleurie still finer and more scattered, the episternal 

 suture very strongly foveolate; middle segment very coarsely rugose, the median 

 channel broadened decidedly toward base, on upi)er surface the rugse form ir- 

 regular fovese, posteriorly transverse, the lateral ridges well developed and reach- 

 ing the upper surface, sides smooth, at least medially ; pygidium coarsely punc- 

 tured as in most species of this section. Black; mandibles and clypeus except 

 their apices, scape, pronotum, tubercles, scutellum and metanotum more or less, 

 tips of the femora, particularly the fore and medial pair, tibife except a spot 

 within and apex of hind pair, tarsi more or less, a band on first abdominal seg- 

 ment, a large spot at each side of second pointed within, narrower spots on third 

 and fourtb, those on latter almost touching within, smaller spots on fifth, and a 

 spot on each side of ventrals 2 and 3, yellow ; silvery pubescence in the usual 

 situations, particularly obvious on mesosternum ; wings fusco-hyaline, paler at 

 base, nervures and stigma dark testaceous. Length 8 mm. 



Georgia. Resembles C. cmgulatus superficially, but the strongly 

 dentate pronotum, punctured pygidium, greater length of first joint 



