AMERICAN HYMENOPTERA. 131 



as long as antennal joints 2 and 4; joints 3 and 4 of about equal 

 length. Cheeks not armed. Head sparsely punctured, at some 

 angles the punctures appear elongate. Thorax longer than wide an- 

 teriorly, the anterior angles sharp, not dentate; the anterior half of 

 the thorax is parallel-sided, the posterior part narrowing; the pos- 

 terior face oblique; dorsulum and posterior face rather granular. 

 Intermediate tibiae much shorter than the tibia?; legs rather robust. 

 First abdominal segment with the second, very slightly nodose. 

 Second segment with large distinct punctures; punctures somewhat 

 more dense in the anterior middle, but nowhere confluent. Pygidium 

 fairly well defined, rounded at the apex, finely granular. Sting very 

 long. Antennas yellowish ferruginous; apices of the mandibles, femora 

 and tibiae piceous; the rest of the insect ferruginous. Sparsely clothed 

 with long pale hairs; the apical margins of segments two and three 

 with a dense fringe of white hair. 



Habitat. — Boulder, Colorado, "in house," October 21 (W. 

 P. andT. D. A. Cockerell). 



The first segment is but slightly nodose with the second, 

 and there is a little doubt, in my mind, in which group this 

 species should be placed, but inasmuch as it is not near to 

 any species in the group anthrophorce, and it is close to nanula 

 D. T., which is placed in group imperalis, I would place it in 

 that group. It may be separated from nanula by the absence 

 of pubescence from the scape, the piceous legs, and the 

 abdomen is not "closely punctured" at the sides. 



Photopsis capricornis n. sp. 



Female. — Length about 6 mm. Mandibles slender without an inner 

 tooth; exteriorly with a deep notch near the base. Scape slightly 

 curved apically; antennal joints 3 and 4 about equal in length, third 

 gradually tapering to the broad apex, fourth emarginate at the base 

 beneath. Antennal fovea rather large, not bounded by a transverse 

 carina above. Malar space distinct; eyes oval, shining without facets. 

 Head with rather close punctures, the punctures of the cheeks smaller 

 and more widely separated. Thorax with the anterior angles sharp 

 but hardly dentate; the anterior sides parallel, posteriorly they nar- 

 row inwardly. Dorsulum and sides of the posterior face coarsely 

 granular; the middle part of the posterior face is smooth and shining. 

 The femora slightly rounded out beneath; the intermediate tibiae are 

 shorter than their femora; the hind basi-tarsus is hardly as long as 

 the two following joints. First and second abdominal segments are 

 sessile. The sides and the apical part of the second dorsal segment 

 with small distinct, sparse punctures; in the basal middle the punctures 

 are close, elongate and sometimes confluent. Pygidium distinctly 

 margined at the sides, smooth, shining, very indistinctly sculptured. 

 Color: Head and thorax rufo-ferruginous; legs, antennas and abdomen 



TRANS. AM. ENT. SOC, XXXV. MARCH, 1909. 



