124 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



A NEW PELECINUS-LIKE GENUS AND SPECIES OF PLATY- 



GASTERID^E. 



PLATE VIII. 

 BY J. C. CRAWFORD AND J. C. BRADLEY. 



DOLICHOTRYPES, new genus. 



Antennae inserted just above mouth parts, ten-segmented, 

 with an apparent ring-joint; the scape long; the funicle 

 three-segmented, the first segment being longest and the last 

 shortest; the club four-segmented; lateral ocelli nearer to the 

 compound eyes than to the front ocellus; parapsidal furrows 

 complete or obsolete anteriorl)'; scutellum bifoveolate at base, 

 produced at apex into a short, blunt spine; metapleurae with a 

 long slender spine on each side, more or less obscured by the 

 vestiture; wings veinless; hind wings contracted at base; 

 middle and posterior trochanters elongate, their femora spindle- 

 shaped, the tibias strongly pedunculate; abdomen broadly ses- 

 sile, that of the female with five segments, margined at the 

 sides, the last three being greatly elongate and flattened, seven 

 times as long as the first two together, the entire abdomen 

 eight times as long as the thorax; abdomen of the male short, 

 acute, five-segmented, the first segment as long as the rest 

 taken together. 



Type, the following new species. 



This genus belongs to the Platygasterinse, and in Dr. Ash- 

 mead's table to the genera of that subfamily in the Journal of 

 the New York Entomological Society, vol. xi, p. 96, the 

 female will run to the second alternate of category 6 but dif- 

 fers at once from Polymecus Foerster as there defined by the 

 fact that the club of the antennae possesses but four segments 

 and that the lateral ocelli are nearer to the compound eyes 

 than to the front ocellus. The males of Dolichotrypes run in 

 the key to Sactogastcr Foerster. 



The genus is evidently closely related to Polvmccns, of which 

 species are known with a four segmented antennal club. Poly- 

 mccns compressiventris is the species which approaches Doli- 

 chotrvpes most closely. The males of Polyinccns differ in 

 having a six-segmented antennal club, the first segment of the 

 funicle short, the second segment elongate and twisted. Both 

 sexes differ in the proportions of the abdominal segments. 



Dolichotrypes hopkinsi, new species. 



Black, except base of scape and legs including coxa?, are brownish 

 yellow and the rest of the antennae are dark brown. Mostly smooth 

 and highly polished. 



Female Head finely reticulate; scape long and slender; thorax and 

 abdomen smooth and polished; apex of median segment and base of 



