NORTH AMERICAN HYMENOPTERA. 199 



segment at base with an enclosure which is strongly depressed or excavated, with 

 its surface rugose, and is pointed iwsteriorly in the middle, and is api)arently con- 

 nected with a deep, elongate-ovate fovea on posterior face, which is indistinctly 

 ridged laterally, and above the fovea is strongly and longitudinally striated ; legs 

 slenderer than in any of the following species, the femora thickened basally as 

 usual and not medially as in peMeellatm, rufigaster and Occident alis ; hind tibiae 

 strongly serrated and spinose; first abdominal segment much longer than the 

 second, not nodose at apex ; pygidium large, triangular, strongly i)unctured, not 

 depressed; wings hyaline, nervures and stigma whitish, the recurrent vein re- 

 ceived by the submarginal cell much before the middle. Head and thorax black ; 

 abdomen except tirst segment and the second in part, reddish ; mandibles, except 

 base and apex, which are rufo- testaceous, scape at base and apex, tips of fore 

 femora, base of medial and hind tibise, and the fore tibife, except a dark stripe 

 within, the anterior tarsi entirely, and the basal joint of the remaining tarsi, 

 pale yellow ; clyiieus and thorax beneath with silvery pubescence. Length 5 mm. 



Texas. One .specimen. 



88. C'rabro asperatus n. sp. 



% . — Anterior margin of clypeus sinuous, the projection just behind it distinct ; 

 mandibles not very large, much less developed than in abdominalix ; head with 

 exceedingly coarse, scattered punctures, which become finer on the front, the 

 cheeks finely and closely punctured ; ocelli in a low triangle, the space between 

 hind pair decidedly greater than the space between them and the nearest eye- 

 margin, all the ocelli situated in strongly marked pits, the vertex lacking the 

 lateral impression on each side of the hind pair; frontal depression deep, the im- 

 pressed line extending to the fore ocellus wide and deep ; first and second joints 

 of flagellum about equal in length, the terminal joints somewhat broadened and 

 obliquely truncate at apex ; cheeks a little rounded out beneath ; the head, al- 

 though considerably produced behind the eyes is not so much so as in ahdominalix ; 

 pronotum at the sides obtusely angular, impressed medially ; thorax coarsely 

 punctured, more closely so than the head, the sculpture of sides and beneath 

 finer ; middle segment as in abdominnlis, but the sculpture not as distinct ; medial 

 and hind tibipe tolerably spinose, the hind pair slightly serrate; first segment of 

 abdomen about one-third longer than the second, the abdomen, in form, clavate, 

 and much longer than head and thorax united ; wings hyaline, nervures pale 

 testaceous, lilack ; mandibles except base and apex, tips of femora, the base of 

 the medial and hind tibise, the fore tibiae, except dark line within, their tarsi en- 

 tirely and two basal joints of remaining tibiae, pale yellow; tegulae testaceous ; 

 clypeus, front, cheeks and thorax on sides and beneath, with dense silvery pu- 

 bescence. Length 4 mm. 



Las Graces, New Mexico (Cockerel! ), Au(2:ust. Two specimens. 

 One specimen exliibits a decided metallic bluish tinge on the thorax. 



21. Group decorus. 

 Similar to group occldeitfdllx, hut the e[)isternum me.sopleuralis 

 ridged anteriorly ; petiole of abdomen short, stout, but little h)nger 

 than the following segment ; pronotum not dentate ; pygidium ( 9 ) 

 broad, Hat, not excavated ; legs not robust, as in the next two grou})s. 

 Male unknown. 



TRANS. AM. ENT. SOC. XXII. JUNE. 1895. 



