V °l88™'] PROCEEDINGS 'OF THE NATIONAL MUSEUM. 405 



the inetathorax areolated but tbe ridges delicate. Wings hyaline, iri- 

 descent; stigma and veins brown, the median and submediau cells of 

 an equal leugth, the cubitus being without a stump of a vein. 



Habitat. — Virginia. 



Described from one specimen. 



Hemiteles rubricornis sp. nov. 



Female. — Length, 3 mm ; ovipositor, l mm . Black, smooth,' polished; 

 antennae, legs, and abdomen reddish-yellow, the petiole black, longitud- 

 inally aciculated. Thorax without grooves; inetathorax distinctly are- 

 olated. Wings hyaline; stigma and veins yellowish, the submediau 

 cell slightly longer than the median. 



Habitat. — Virginia. 



Described from one specimen. 



Hemiteles Townsendi, sp. nov. 



Male. — Length 5.4 mm . Head and thorax black, polished, pubescent, 

 sparsely punctate ; antenna* 23-jointed, brown black, two basal joints, 

 palpi and mandibles ferruginous. Thorax without grooves; collar 

 with raised lines at sides; inesopleurae smooth, polished, excepting 

 some raised lines and punctures along the sutures; tegulae pale 

 yellow ; inetathorax areolated, the surface of areas with short raised 

 lines and wrinkles. Legs and the abdomen, except the black petiole, 

 ferruginous ; the posterior legs are rather long, the tips of tiba? and the 

 tarsi slightly obfuscated. Wings hyaline, iridescent; the stigma and 

 veins brown. 



Habitat. — Michigan. 



Described from one specimen received from Mr. Tyler Townsend. 



Hemiteles syrphicola, sp. nov. 



Male. — Length 4 mm . Head and thorax black, opaque, minutely sha- 

 greened and with some punctures scattered on the surface. Antennae 

 24-jointed, yellow-ferruginous, gradually becoming dusky beyond the 

 middle. Thorax with parapsidal grooves indicated anteriorly, pleurae 

 aciculated, metatborax strongly areolated, the surface of areas minutely 

 rugose; tegulae yellowish-white; legs reddish-yellow, posterior femora 

 at apex, tibiae and tarsi dusky. Abdomen ferruginous, the petiole and 

 basal two-thirds of second segment longitudinally aciculated, the rest 

 of the abdomen smooth, polished. Wings hyaline; stigma and veins 

 brown, the cubitus not broken at the middle by a stump of a vein, and 

 the median and submediau cells of an equal leugtb. 



Habitat. — Washington, D. C. 



Described from one specimen ; reared August 3, 1884, from a Syrphid 

 puparium, Mesograpta obliqua Say, found on wheat, the larva of which 

 preys on Siphonophora arena: 



