260 U. S. NATIONAL MUSEUM BULLETIN 216 



deum with a few hairs basally and in its apicolateral corner; front spur 

 of hind tibia about 2.8 as long as wide; punctures of second tergite of 

 moderate size, sharp, medially very sparse or absent, the sublateral 

 punctures separated by about 1.5 their diameter. 



Black. Face, lower 0.6 ± of temporal orbit, large triangular spot at 

 top of eye, cheek, adjacent temple, clypeus, mouth parts, front of 

 scape, upper margin of pronotum (wide posteriorly, tapered forward 

 to reach epomia), tegula, subtegular ridge, spot or area in upper part 

 of prepectus, and usually narrow side and apex of scutellum and narrow 

 line on postscutellum, ivory; flagellum brown beneath; thoracic pleura 

 and sterna more or less fulvous, usually entirely fulvous on lower half 

 of propleurum, mesosternum, metasternum, mesopleurum and 

 metapleurum except at sternaulus and below subtegular ridge; front 

 and middle legs fulvous, their coxae and femora apically, tinges on 

 trochanters, basal 0.5 ± of tibiae, and tarsi basally, whitish; hind coxa, 

 trochanters, and femur fulvous, the coxa paler apically; hind tibia 

 whitish, its apical 0.35 ± fuscous; hind tarsus white, the apical half 

 of its fifth segment brown. 



Type: 9, Morristown, N. J., July 14, 1926 (Washington, USNM 

 63678). 



Paratypes: 9, Steamboat Springs, Colo., Aug. 6, 1948, H., M., G., 

 D., and J. Townes (Townes). 9, Delta Co., Mich., July 2, 1955, 

 R. R. Dreisbach (Dreisbach). 9, Gratiot Co., Mich., Aug. 24, 1946, 

 R. R. Driesbach (Driesbach). 9, Farmingdale, N. Y., July 15, 1938, 

 H. and M. Townes (Townes). 9, Westerly, R. I., Aug. 10, 1946, M. 

 Townes (Townes). 



This species occurs from the Atlantic to Colorado, in the Transition 

 zone. 



52. Exochus ventricosus, new species 



Figures 190,s; 196,f 



Male: Unknown. 



Female: Front wing 3.7 to 4.0 mm. long; combined face and clypeus 

 about 0.87 as high as wide, strongly convex and bulging at and below 

 the middle, almost flat above the middle; apical angle of interantennal 

 process about 75 degrees; median area of Irons rather strongly raised 

 and differentiated; median 0.5 of clypeal margin faintly concave; 

 mandible rather long, moderately wide, not twisted, weakly tapered 

 from its condyles to base of its teeth then strongly constricted, its lower 

 tooth very short and broad, its upper tooth long, its outer face with 

 a few small punctures; second lateral area of propodeum with a few 

 hairs in extreme base and apicolaterally ; front spur of hind tibia 

 about 3.0 as long as wide; punctures of second tergite of moderate 

 size, sharp, medially absent, the sublateral punctures separated by 

 about 1.5 their diameter. 



