July, '09] ENTOMOLOGICAL NEWS. 323 



Notes and Descriptions of Wasps. 



By S. A. ROHWER, Boulder, Colo. 



Crabro (Hoplocrabro) boulderensis n. sp. 



Male. Length 7 mm. The middle portion of the clypeus with three 

 small obtuse teeth ; outside of the produced portion is a distinct tooth ; 

 no middle carina on the clypeus; mandibles bidentate at the apex; 

 front, cheeks, and vertex with distinct, rather small separate punctures ; 

 facial basin not bounded above by a distinct carina ; a distinct furrow 

 from the anterior ocellus; supraorbital fovea more or less distinct; 

 ocelli in an equilateral triangle; the distance between the lateral ocelli 

 less than the distance between a lateral ocellus and the nearest eye mar- 

 gin ; antennas slender, sparsely clothed with thin white pile; apical joint 

 truncate, the third joint distinctly longer than the fourth. Pronotum 

 subtriangular, each anterior angle raised into an obtuse, rounded, low 

 tooth; the anterior face of the pronotum punctured; the dorsulnm mid 

 scutellum shining, with some small scattered punctures, the scutellum 

 rounded, slightly impressed. Mesopleuras shining sparsely punctured; 

 a strong carina from the tegulre to the pectus, this carina is bent in 

 the middle. Metathorax short, rounded, with a longitudinal carina and 

 a few irregular stria? basely; mctanotum and metapleurae shining, with 

 a few punctures ; the posterior face margined below. Legs stout, nor- 

 mal : the posterior tibiae with flattened spurs. The recurrent nervure 

 received by the cubital cell as far from the apex as the length of the 

 transverse cubitus. Abdomen longer than the head and thorax, finely 

 punctured, the apical segment a little more coarsely so than the pre- 

 ceding. Black, clypeus, a line on the scape in front, two r pots on the 

 pronotum, tubercles, postscutellum, a line on the four anterior tibi;c and 

 tarsi exteriorly, and the base of the posterior tibiae ivory-white ; tegulae 

 brownish. Head and thorax clothed with white pile, denser on the 

 pleura; and the clypeus. Wings dusky, venation black. 



Type locality. Boulder, Colorado. One male found dead on 

 a window sill, March 6, 1909, by S. A. Rohwer. 

 Very distinct from all other described species. 



Rhopalum (Moniaecera Ashm.) abdominalis (Fox). 



The male of this species is very much like the female. The 

 abdomen is entirely black and, more slender than in the female ; 

 length 4 mm. The male may be separated from 



