1899.] NATURAL SCIENCES OF PHILADELPHIA. 445 



lumenes sufFusa n. sp. 



9. — Black, variegated with rufous; head black, a rufous spot 

 between antennse and on clypeua medially; sides of clypeu?, dot 

 in eye-emargination, hind orbits above, spot near base of clypeus, 

 pale yellow; scape except above at apex, and flagellura beneath 

 reddish; thorax with glittering pile, longest on middle segment; 

 pronotum except a spot on each side, two lines on dorsulum, scutel- 

 lum and postscutellum entirely, middle segment except medially 

 and sides, greater part of mesopleurse and coxte and legs except 

 femora above, petiole at sides and apically, second and third dor- 

 sals apically, two large blotches on second ventral, and -segments 

 4-6, dull rufous; a yellow hue at apex of petiole and just before 

 apex of second segment; front with rather strong, separated punc- 

 tures, covered in certain lights Avith silky pile pertaining slightly 

 to golden; clypeus flat, sparsely punctured, pyriform, not or in- 

 distinctly carinate, terminating in two triangular teeth ; ocelH in 

 curved line; flagellum clavate; thorax strongly punctured, most 

 closely on pronotum, the latter distinctly margined; punctures of 

 dorsulum quite coarse posteriorly as are those of scutellum which is 

 indistinctly impressed ; middle segment broadly depressed or sub- 

 concave; petiole hardly as long as thorax, narrowly campanulate, 

 strongly punctured, gradually enlarged from a point before termi- 

 nus of its basal third, narrowly transversely depressed before apex; 

 second dorsal more closely punctured, the remaining dorsals more 

 finely, ventrals impunctate; wings subhyaline, broadly dark fus- 

 cous along costal margin and in marginal cell; stigma brownish; 

 nervurcs dark. Length 9 mm. 



cJ'. — Clypeus entirely yellow, longer than broad, widely and 

 triangularly notched at apex; petiole fully* as long as thorax; 

 seventh ventral plate with a basal carina which terminates in a 

 tooth or sharp tubercle medially. Length 9 mm. 



Corumba, April; Chapada, November, December. Eleven 9, 

 three c? specimens. Compared with E. uruguayensis Sauss., 

 with which suffusus is closely related, the clypeus is a little longer 

 and narrower, the front has sericeous pile, the petiole is stouter 

 with the swollen portion larger though less convex and punctua- 

 tion of second dorsal is stronger. The coloration of both species 

 is remarkably similar, but in xiruguayensis there is no black on pro- 

 notum and no red on scutellum and the apical segments are dark. 



