378 U. S. NATIONAL MUSEUM BULLETIN 2 1 6 part 3 



A series of 2cf , 49 taken by us at Ann Arbor, Mich., was from an 

 old field that had overgrown with grass, weeds, and Crataegus. 



This species is transcontinental in the Transition and Canadian 

 zones. 



18. Genus Hemisphragia 



FiGUBE 317,a 



Micromavia Seyrig, 1952, M6m. Acad. Malgache, fasc. 19, p. 204. New synonymy. 



Type: Micromavia carinata Seyrig; original designation. 

 Hemisphragia Seyrig, 1952, Mem. Acad. Malgache, fasc. 19, p. 207. Type: 



Hemisphragia trianguliferus Seyrig; original designation. 



Front wing 3.6 to 5.7 mm. long; body slender; frons unarmed; 

 clypeus moderately large, rather evenly convex, its apical margin 

 broadly, evenly convex or with a broad, faint median lobe; subapical 

 part of female flagellum a little widened, wealdy flattened below; 

 mesoscutum rather short, moderately convex, polished or subpolished, 

 its punctures moderately small to fine, separated by about 1.0 to 3.0 

 their diameter; notaulus sharp, extending to center of mesoscutum or 

 a little beyond; epomia moderately long and strong; propodeum 

 moderately long, rather gently sloping, in profile weakly convex, its 

 spiracle round to elliptic, its transverse carinae complete, the apical 

 carina not forming sublateral crests; areolet rather small, irregularly 

 pentagonal with the apical side shortened, the second intercubital 

 obsolescent; ramellus absent; nervulus opposite basal vein or approxi- 

 mately so; second discoidal cell strongly narrowed basally but not 

 pointed; apical half of mediella very strongly arched; nervellus broken 

 near or below the middle, often near its hind end; brachiella absent 

 (present in all other Nearctic genera normally, but sometimes absent 

 in Lymeon); axillus weak, close to anal margin; first tergite long, 

 slender, rather gradually widened apically, terete except that a blunt 

 dorsolateral carina is more or less evident distad of spiracle, 'without 

 a basolateral tooth, its spiracle near its apical 0.38; second tergite 

 mat to subpolished, its punctures fine and weak to moderately small 

 and moderately sharp, moderately sparse to rather dense; tergite 7 

 sometimes with a median white spot; ovipositor sheath about 0.42 as 

 long as front wing; ovipositor slender, compressed, its tip elongate 

 sagittate. 



This genus contains two species in Madagascar, an undescribed 

 species in China, and one Nearctic species. There are probably more 

 species in Asia and Africa, which more intensive collecting will 

 eventually discover. 



1. Hemisphragia debilis, new species 



Front wing 3.6 to 4.0 mm. long; general structure as in figure 317, a; 

 mesoscutum polished, with very small and rather sparse punctures; 



