THREE NEW GENERA AND SPECIES OF PARASITIC 



HYMENOPTERA. 



By J. C. Crawford, 



Assistant Curator, Division of Insects, I . S. National Museum. 



Two of the genera described in this paper were received in the 

 regular course of work through the Department of Agriculture, and 

 the other was first found in the material donated to the U. S. National 

 Museum by the Washington Biologists' Field (Huh. Of the genera 

 described, two are very interesting on account of their hosts, and the 

 one first described is the most interesting, belonging as if does to a 

 family no member of which has hitherto been reported as an egg 

 parasite. In the study of these species, as in all other work on ! he 

 Chalcidoidea, a Zeiss binocular microscope, with a magnification of 

 from 28 to 35, has been used. 



Superfamily CHALCIDOIDEA. 

 Family MISCOGASTERID^. 



ERIXESTUS, new genus. 



Head slightly wider than thorax; clypeus medially deeply incised; 

 mandibles with four long teeth; antennas 12-jointed, with two ring 

 joints, inserted on the middle of the face, very similar in the two 

 sexes; funiclar joints almost quadrate, slightly pedicellate at base: 

 club of antennae slightly enlarged in the female, in the male not 

 thicker than the joints of the fnnicle; parapsidal furrows complete; 

 scutellum at base with an arcuate fovea and with a cross furrow before 

 apex; axillae almost meeting; hind tibiae with two apical spurs, one 

 very small: abdomen with a short petiole: wings with marginal 

 fringes, the postmarginal vein about as long as the marginal, the 

 stigmal shorter. 



In Doctor Ashmead's classification of the Chalcidoidea this genus 

 would run to the Miscogasterini, where it does not seem closely related 

 to any known genus. 



Type of genus. — /'.'. vrinnemana Crawford. 



Proceedings U. S. National Museum, Vol. 38, No. 1730. 



87 



