366 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



closel}'^ punctured and with long, coarse haiv.s bending downward, and 

 showing traces of silvery pubescence in some cases; frons finely, 

 closely i)unctured, the punctures more scattered above iind almost 

 absent near the ocelli; on the sides of tlie frons are traces of silvery 

 pubescence and black hairs are also present, more scattered above and 

 on the vertex and cheeks; vertex sparsel}', tinel}^ punctured; cheeks 

 narrow, glistening, with scattered minute punctures; eyes converging 

 ver}' slightly downward; antennae black, the first segment of the fila- 

 ment longest, increasing slightly in diameter toward its tip; mandibles 

 bhick, two-toothed, with traces of dark ferruginous. 



Thorax. — Collar black, with fine, scattered punctures and a few short, 

 black hairs; its dorsal edge rather rounded from front to rear, evenly 

 rounded laterally; prothoracic lobe sparsely covered with short, black 

 hairs and with a dense fringe of pale brown hairs behind; mesonotum 

 black, glistening, slightly sericeous, rather closely and finely punc- 

 tured and bearing scattered, black hairs, with a slight anterior median 

 groove; its lateral margin refiexed from in front of the teguhe to 

 where it meets the scutellum; scutellum glistening l)lack, very min- 

 utelv punctured, with a rather deep, median groove; postscutellum 

 similarly punctured, glistening black; dorsum of the median segment 

 dull black, finely, transversely aciculate, thickl}' covered with shoi't, 

 white hairs; its outline sharpl\' marked by a groove extending from 

 the side of the postscutellum to the stigma, and thence to the fovea, 

 the area thus marked being shield-shaped; stigmatal groove al)sent; 

 sides and posterior end of the median segment dull black, minutely, 

 closel}^ punctured, quite thickly covered with black hairs at the sides, 

 but mingled with white ones behind; petiole short, straight, black, 

 sometimes slightl}' tinged with ferruginous, sparsely, minutel}- punc- 

 tured, and with a few short, black liairs. 



Abdomen. — Usually rather elongate-oval; above, smooth, somewhat 

 glistening, pale ferruginous varied with darker, particular!}- on the 

 more posterior plates; ver^- slightl}- sericeous in some lights, with a 

 few pale hairs on the hinder margin of the last plate; beneath of the 

 same color as above, the darker areas more irregularly scattered, giving 

 a somewhat mottled appearance; a few dark hairs are present on the 

 second ventral plate and lighter ones on the last one, while a very few 

 scattered hairs are present on the intervening plates. 



Wings. — Yellowish h3'aline, somewhat fuliginous on their outer 

 margins; sometimes entirely fuliginous; second cubital cell of the fore 

 wing rhombic; I'adial cell rather scpiarely rounded; the second and 

 third n^ansverse cubital veins al)out as far !i{)art on the radial cell as 

 the former and the second recurrent vein arc on the cubital cell; 

 cubital vein obsolete l)eyond the third cubital cell: transverse median 

 vein of the hind wing making more than a right angle with the median 

 vein; the discoidal vein practically interstitial: teguhe black in front 

 but with a trace of ferruginous behind; faintly punctured. 



