AET. 2. ICHNEUMON-FLY GENUS METEORUS MUESEBECK. 11 



29. Nervellus nearly twice as long as lower abscissa of basella; scutellum more than 



usually convex; last segment of maxillary palpi a little longer than the pre- 

 ceding segment 29. euschausiae, new species. 



Nervellus not nearly twice as long as lower abscissa of basella; scutellum not so 

 strongly convex; last segment of maxillary palpi not distinctly longer than the 

 preceding segment 30 



30. Malar space in female as long as basal width of mandible; face a little broader 



than long between lower margin of antennal foramina and base of clypeus; 

 ocell-ocular line slightly longer than diameter of an ocellus; first abdominal 

 segment stout, the postpetiole unusually broad; ovipositor sheaths hardly 



half as long as the abdomen 30. datanae, new species. 



Malar space in female much shorter than basal width of mandibles; face at least 

 as long as broad; ocell-ocular line usually as long as diameter of an ocellus; 

 postpetiole normal ; ovipositor sheaths usually two-thirds as long as the abdomen. 



31. hyphantriae Riley. 



1. METKORUS LEVIS, new species. 



Differs from our other species that possess a broadening and 

 divided radiellan cell in its smaller size, in the shorter antennae, 

 and in the unusually smooth pleura. 



Female. — Length 4.5 mm. Head transverse; face much broader 

 than long between lower margin of antennal foramina and base of 

 clypeus, smooth and polished; malar space a little more than half as 

 long as basal width of mandible; eyes large, with sparse, exceedingly 

 short, indistinct pubescence; antennae 30-segmented, the first 

 flagellar segment a little longer than second; ocell-ocular line very 

 slightly longer than greatest diameter of an ocellus; mesonotal lobes 

 practically impunctate, polished; parapsidal furrows well marked, 

 but very fine and shallow; scutellum nearly fiat, polished; propodeum 

 mostly smooth and shining, with a fine irregular transverse carina 

 near base, two sublateral carinae, and a median longitudinal carina 

 on apical third; propleura very weakly punctate, strongly shining; 

 mesopleura and metapleura smooth and polished; wings rather large; 

 radial cell ending somewhat before apex of wing; first abscissa 

 of radius about half as long as second, the latter nearly or quite as 

 long as second intercubitus; recurrent vein interstitial with first 

 intercubitus; radiellan cell distinctly broadening toward apex of 

 wing, with a suggestion of a transverse division somewhat before 

 middle; lower abscissa of basella at least as long as nervellus, but 

 shorter than the upper abscissa of basella; legs very slender; spurs of 

 posterior tibiae of equal length and nearly one-third as long as the 

 metatarsus; abdomen a little longer than thorax; first abdominal 

 segment as long as the remaining segments united, finely striate and 

 provided with two dorsal fossae on the petiole anterior to the rather 

 prominent spiracles, which are in the middle of the segment; oviposi- 

 tor sheaths not distinctly half as long as the abdomen. Body color 

 ferrugino-testaceous; scape of antennae concolorous with face; ped- 

 icel and flagellum slightly darker, the latter becoming dusky at apex; 



5590— 24— Proc.N.M.vol.6.3 4 



