250 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



Newington, Fairfax County, Virginia. One female collected June 

 4, 1911, by S. A. Rohwer. 



Type.— C&t. No. 14423, U.S.N.M. 



e. Postocellar line longer than the ocellocular line. 

 ACORDULECERA NIGRITARSIS, new species. 



Female. — Length 4 mm. Labrum rounded apically; apical margin 

 of the clypeus broadly depressed; supraclypeal area flat ; middle fovea 

 oval in outline, and nearly confluent v»'ith the distinct frontal furrow; 

 antenna! furrows complete to ocelli, wliere they end abruptly; apical 

 joint of the flagelhlm somewhat shorter than preceding. Black; 

 clypeus, labrum, mandibles (apices piceous), palpi, tegulse, narrow 

 line on pronotum and legs (except the brown hind tarsi) yellowish 

 white. Wings hyaline, iridescent; venation dark brown. Face 

 with rather dense white hair. 



Newington, Fairfax County, Virginia; one female collected May 

 30, 1911, by S. A. Rohwer. Brown's Mills Junction, New Jersey. 

 One female collected June 22, 1907, received from Mr. V. A. E. 

 Daecke. Michigan. Long Island. 



Type.— Cht. No. 14424, U.S.N.M. 



In some of the paratypes the venter is pale, otherwise they seem to 

 be the same. 



ACORDULECERA BASIRUFA, new species. 



Similar to nigritarsis, but can easily be distinguished by the reddish- 

 yellow spot at the base of the abdomen. 



Female. — Length 4.5 mm. Labrum subangulate apically; apical 

 margin of the clypeus depressed, basally convex; supraclypeal area 

 flat; middle fovea elongate; frontal furrow poorly defined; antennal 

 furrows distinct, terminating at the lateral ocelli in a fovea; apical 

 joint of the anteimse shorter than the preceding. Clypeus, labrum, 

 mandibles (apices piceous), palpi, tegula^, legs (except bro\vn hind 

 tarsi), and base of the abdomen reddish-yellow. Wings dusky 

 hyaline; venation pale brown. Face with rather dense white hair. 



Jacksonville, Florida; one female from Ashmead's collection. 

 Enterprise, Florida; one female collected May 9. Kansas; female 

 from C. F. Baker collection. 



Type.— Cut. No. 14425, U.S.N.M. 



D. Middle fovea wanting. (First joint of the flagellmn longer than the 

 second, postocellar line longer than the ocellocular line.) 



ACORDULECERA FLAVIPES, naw species. 



Related to A. dorsalis Say, as restricted by MacGillivray teste a 

 specimen from him, but may be superficially separated by the absence 

 of much hair on the face. 



