316 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



numerous black hairs, longest and nearest together near the stigmatal 

 groove; petiole straight, glistening, slightly longer than the first 

 filament segment, finel}" punctured, and with numerous long, i)lack 

 hairs. 



Alxlinnen. — Ijong, ovate, more pointed behind, rather rounded in 

 front, glistening; above somewhat sericeous; stigmata of tirst segment 

 oblique, in front of the middle; the segments show a few faint, scat- 

 tered punctures, becoming closer and larger on the last three seg- 

 ments; on the first two of these there is a row of punctures parallel to 

 and a little in front of the hinder margin, with a very few short, black 

 hairs at the extreme side on the first of the two, Init extending nearer 

 the middle in the second; tlie terminal segment has more and longer 

 hairs generally distributed over the surface; its hinder margin is 

 bluntly acuminate and its sides somewhat emarginate near the tip; 

 the margin is sometimes pale, and the entire segment is sometimes 

 black and not metallic; beneath, glistening, sometimes sericeous, with 

 scattered, minute punctures mainly toward the sides and on the front 

 part of the plates in the center; the punctures increase in number and 

 size on the hinder segments; short black hairs have the same distribu- 

 tion as above; last segment coarsely, quite closely, punctured, with a 

 slight median ridge on its posterior portion (sometimes its whole 

 length) and with a slightlj' thickened posterior margin acutely oval in 

 outline; the front portion of the last segment (usually concealed) is 

 slight!}^ or not at all punctured and the segment may be black and not 

 metallic. 



^Y^ngs. — Dark fuliginous with violet reflection which is lost on the 

 outer margins, these being rather velvety in appearance; fore wing; 

 second cubital cell high and narrow, receiving the first recurrent vein 

 before, at, or beyond the middle; third cubital cell nearly as long as 

 the radial; external end of radial cell rounded; second transverse 

 cubital vein not straight, bending into the second cubital cell; hind 

 wing; discoidal vein interstitial with the median and transverse median 

 veins, the latter two meeting at about right angles; cubital distinct 

 beyond the transverse cubital (which is quite straight); radial vein 

 external to the transverse cubital strongly arched. Teguhv black, 

 slightly sericeous in front, glistening; with scattered, minute punc- 

 tures and a few short, black hairs; its posterior margin sometimes 

 faintl}^ dull ferruginous. 



Legs. — Black, somewhat glistening; coxa^ and trochanters black, 

 metallic in some cases; femora stout, black, sometimes metallic, glis- 

 tening, with scattered punctures and numerous quite long, black hairs, 

 and somew'hat sericeous in some lights; fore and middle tibite shorter 

 than their femora, brownish; fore tibife light brownish sericeous on 

 the inner face; fore tarsi brownish, light brow^nish sericeous beneath, 

 wdth seven or eight (usuall}^ seven) comb teeth; claws almost ferru- 



