382 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



Genus HEMIDIANEURA Kirby. 

 HEMIDIANEURA ALBOCOXA, new species. 



Related to H. tenehrica Konow from Surinam, but lias black tegulse, 

 partly pale clypeus, and the antennal furrows are not punctiform. 



Female. — ^Length 8.5 mm. Labrum punctured, depressed in the 

 apical middle; clypeus truncate; supraclypeal area convex; below 

 the antennae the head is punctured, above shining; antennal furrows 

 extending to the vertex; middle fovea subcircular in outline, joining 

 the ocellar basin; postocellar furrow distinctly present; lateral 

 ocelli slightly anterior to the supraorbital line; pedecellum a little 

 wider than long; flagellum rather slender; third cubital cell about 

 twice as long on the radius as on the cubitus; second recurrent 

 vein, interstitial with the second transverse cubitus; both in the 

 fore and hind wings there is a spurious branch to the median extend- 

 ing nearly to the anal vein; stigma broadest at the base; sheath 

 rather slender, straight above, sharply pointed, the lower margin 

 oblique. Black: mesonotum except anterior part of middle lobe, 

 scutellum, and a spot beneath wings red; most of clypeus, spot at 

 base of costa, legs to basal third of tibiae yellowish- white. Wings 

 dark brownish-black; venation black. 



Male. — Length 7 mm. Agrees ^^dth the female except for the 

 sexual differences. Hypopygidium gently rounded apically, about 

 twice as wide as long; gentalia stipes rather broad, gently rounded 

 apically. 



San Bernardino, Paraguay. Two males and seven females, num- 

 bered 2175a and 2175. Presented to the United States National 

 Museum by K. Fiebrig. 



Type.— Csit. No. 13989, U.S.N.M. 



Genus ATOMACERA Say. 



ATOMACERA DECEPTA, new species. 



Related to desmodii Dyar, but the sheath is obtusely pointed at 

 the apex, not obliquely truncate, and the scutellum is black. From 

 deiilis Say it differs in the poorly defined ocellar basin. Ruficollis 

 Norton is veiy different in the sharply defined middle fovea. 



Female. — Length 4.5 mm. Clypeus and labrum gently arcuately 

 emarginate; supraclypeal fovese distinct, punctiform; ocellar basin 

 indistinct almost wanting, poorly defined above the ocellus; posto- 

 cellar furrow wanting; postocellar line slightly shorter than the 

 ocellorbital line; third cubital cell wider on the radius than on the 

 cubitus, about three times as wide at apex as at base; sheath narrow, 

 nearly parallel sided, at the apex obtusely pointed. Black ; pronotum 

 broadly, tegulse and mesonotum except a large spot on anterior lobe 

 ruf o-testaceous ; wings brownish, venation brown. 



New York. One female. 



Type.— C&t. No. 13990, U.S.N.M. 



