180 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



but the first distinctly wider than long ; club showing a trace of seg- 

 mentation, oblique]}^ truncate to the basal fourth, wider at base than 

 the last funicle joint, and as long as the last three funicle joints and 

 one-half of the third combined. Mandibles with three short teetli, the 

 lower two acute, and the upper or inner one blunt. Axillae slightly 

 elevated above the scutellum; the latter moderately convex, sloping 

 toward the sides and apex, and with a median impressed line for a 

 short distance at the base. Wings broad, basal area of wing with a 

 few scattered cilia, the speculum indistinct; stigmal vein forming 

 somewhat less than a right angle with the postmarginal and origi- 

 nating before the submarginal quite reaches the costal margin, post- 

 marginal vein about a third as long as the stigmal. Abdomen narrow, 

 about a half longer again than wide and two-thirds as long as the 

 thorax or a little more, the sides subparallel or but slightly curved, 

 the base rather broad, the apex truncate; tactile plates situated a 

 little less than halfway from the middle to the apex; the ovipositor 

 concealed. Sculpture more prominent than in other species of the 

 genera, but of the same character; the frontovertex with about six 

 rows of small, shallow but distinct pin-punctures, the postorbital 

 region linely reticulate, the occiput with a fine fingerprint-like 

 lineolate sculpture; mesoscutum with line but distinct reticulations, 

 the axillae and scutellum with the reticulations not much coarser but 

 much more deeply impressed and generally lengthened or otherwise 

 irregalar surrounding the impressed line at the base of the scutellum; 

 the first tergite of abdomen with the reticulations comparatively 

 coarse, but nearly as delicately impressed as those of the scutum, and 

 uniform in shape and size from base to apex. Pubescence white and 

 prominent on head, pronotum, mesoscutum and especially on meta- 

 pleura and hind coxae, but more scattered and less prominent on the 

 axillae and scutellum and somewhat darker in color. Length of 

 body, 2.02 (to 2.39); length of head, 0.72; width of head, 0.685; width 

 of vertex, 0.195; length of eye, 0.51; width of eye, 0.32; length of 

 antenna, 1.04; width of mesoscutum, 0.74; length of forewing, 1.82; 

 width of forewing, 0.73 mm. 



Coloration rather shiny but not metallic ])lack; tegulae white, 

 with the outer, apical corner broadly blackish. Scape brown, the 

 pedicel and flagellum blackish brown. Legs brownish yellow, the 

 middle and hind coxae mostly blackish, the middle femora darker 

 brown, the hind tibiae especially on the upper side brownish black, 

 middle and hind tarsi and tibial spur yellowish white, with the last 

 joint of the tarsi brown. Wings hyaline, with yellowish veins. 



Male. — -Much like the female except that the abdomen is much 

 shorter or about as long as wide ; face, f rons, and a greater part of the 

 cheeks primuline yellov/ (R.), the postorbital region dark brown, the 

 vertex blackish; legs brighter, purer yellow, tlie middle femora not 



