200 WILLIAM J. FOX. 



89. Crabro decor us n. sp. 



9 . — Clypeus subcarinated, slightly and obtusely produced medially ; head 

 finely and evenly punctured, shining: ocelli in a high triangle; no lateral im- 

 pressions on the vertex : frontal depression shining, the impressed line running 

 from it to the fore ocellus distinct ; first joint of flagellum longer than the second, 

 the pedicellum not unusually large; dorsulum more closely punctured than the 

 head, subopaque : mesopleurte more strongly and less closely punctured ; middle 

 segment with a distinct enclosure above, the furrows foveolate, particularly the 

 basal one, ujjper surface smooth, posterior face transversely striated, with distinct 

 lateral ridges; legs rather slender, the hind tibise spinose, but scarcely serrate ; 

 abdominal petiole short, stout, nodose apically, but little longer than the follow- 

 ing segment ; pygidium broad, acute at ajiex, strongly punctured, at apex a little 

 depressed, but not excavated. Black ; mandibles except tips, scape, pronotum, 

 tubercles, scutellum anteriorly, coxse apically, trochanters, four anterior femora 

 except a dark spot at base above, fore tibiaj entirely and the others except a line 

 on the medial internally and inner portion of hind pair, the four anterior tarsi 

 and the basal joints of hind pair, yellow; this color encircles the hind tibiae at 

 base ; clypeus and thorax on sides and beneath with silvery pubescence ; abdomen 

 with a sericeous pile ; wings hyaline, strongly iridescent ; nervures and stigma 

 black. Length 4.5 mm. 



Las Cruces, New Mexico (Cockerell ), in October. 



22. Group occldentaUji. 



Differs from all the preceding by the non-ridged episternuni meso- 

 pleuralis ; pygidium ( 9 ) broad, depressed apically ; petiole of ab- 

 domen shorter than the following segment ; legs robust. 



90. t'rabro occidentalis n. sp. 



9 . — Clypeus slightly convex, depressed laterally, its anterior margin in the 

 middle with a broad, truncate production; head finely, but distinctly punctured ; 

 ocelli in a triangle, the depressions on the vertex distinct, and in addition there 

 is an impressed line which extends back to the occiput ; frontal depression glab- 

 rous, broad, the impressed line which extends upward from it deepest just before 

 the anterior ocellus; second joint of flagellum about one-quarter longer than the 

 first, which joint is about a third shorter than the pedicellum ; thorax punctured 

 like the head ; middle segment without a basal semicircular enclosure, but at 

 extreme base there is a transverse row of strong fovese, the upper surface is parted 

 by a medial, longitudinal, strongly impressed line, which terminates in a deep 

 pit at the base of i)osterior face, the sides of this pit each with a strong ridge, 

 these two ridges meet at the apex of the pit and extend to apex of middle segment 

 in the shape of a Y, the posterior face of middle segment is strongly ridged later- 

 ally, and is another ridge connecting the lateral with the medial ridges at the top 

 of the posterior face, the surface of which is marked with some coarse folds ; legs 

 robust, the medial and hind tibise with not very strong spines, the hind tibise but 

 feebly serrated without ; first abdominal segment shorter than the second, nodose 

 at apex, with two well-developed, parallelo-longitudinal ridges basally, which are 

 as long as one-third the length of the segment; pygidium broad, subtriangular, 

 obtuse at apex, depressed at the sides and apex ; wings subhyaline, iridescent, 



