240 HENRY L. VIERECK. 



proaching a triangular outline not parallel sided. The male would 

 seem to be related to gi'oup niditiventris of Fox, from which it 

 differs at once by the abscence of convex enclosures on the superior 

 face of the raetathorax. 



%. 7,5 mm. long. Head. — Closely, finely, indistinctly puuctuied, especially 

 on the front; distance between posterior ocelli less than the distance between 

 the lateral ocellus and the eye margin ; the distance between the eyes at base of 

 clypeus is greater than the clypeus is high. ('lypeus convex, with the surface 

 hidden by dense appressed pubescence, the anterior margin slightly sinuate, not 

 dentate; first joint of flagellum a little shorter than 2 and 3. 



Thorax. — -Pronotum rounded almost inipunctate, the anterior lateral angles 

 feebly bluntly spinose ; dorsuluni with rather indistinct small setigerous jiunc- 

 tures adjoining on the sides, separated in the middle; mesopleura with the punc- 

 tures a little larger than those on the dorsulum, and sparse episternal sutures 

 strongly foveolate ; punctures on the scutellum smaller and sparser than on the 

 dorsulum; postscutellum rough, apparently impunctate; metathorax on the 

 superior face with a median almost hexagonal enclosure, surrounded by strong 

 ridges, broader at base than at the apex, outside of this enclosure the sculpture 

 is irregular reticulate, the ridges far apart the surface between shining, poste- 

 rior face of the metathorax dull, with a median longitudinal enclosure marked 

 oif by weak ridges and about four times as long as wide. Metapleura polished, 

 impunctate, with a short ridge just above the inferior margin ; wings brownish, 

 the nervures and stigma dark brown, transverse median nervure distinctly basad 

 of the basal nervure, recurrent nervure entering the submarginal cell distinctly 

 beyond the middle, transverse cubitus entering the marginal cell in the middle. 



Abdomen. — First two segments almost inipunctate, the remaining segments 

 rather densely punctured with minute, indistinct, setigerous punctures; pygidium 

 coarsely, closely punctured, the apical half covered with appressed bristles. 



Black ; a large part of the scape, mandibles except base and apex, four anterior 

 legs with tibiae in front and basal joint of tarsi, posterior legs with apical two- 

 thirds of tibise in front and basal joint of tarsi yellow, tubercles, a short line on 

 each side of the pronotum, a spot on the scutellum. a more or less broadly inter-, 

 rupted band on segments 1, 2, 3 and 4 yellow, spurs, claws and all except basal 

 joint of tarsi brownish. 



%. 6 mm. long. Head. — Front, vertex and occiput apparently impunctate, 

 the cheeks with fine .setigerous punctures; distance between posterior ocelli 

 greater than the distance between the lateral ocellus and nearest eye margin ; 

 clypeus convex, basal half dull rugulose, apical half shining, the sculpture not 

 quite hidden by the dense appressed silvery pubescence; first joint of flagellum 

 about as long as the second. 



Thorax. — Pronotum rounded not angulate; dorsulum impunctate except for 

 the very fine setigerous punctures; mesopleura sculptured much like the dor- 

 sulum ; postscutellum ajiparently impunctate. polished ; metathorax irregularly 

 reticulate, posterior face with the ridges not so sharp and with a median V-shaped 

 polished enclosure; metapleura irregularly striate; wings brownish, the nervures 

 and stigma black. 



Abdomen. — Dorsally with vei'y n^inute setigerous punctures; penultimate seg- 



