456 PROCEEDINGS OF THE ACADEMY OF [1899. 



thorax, basal stem stout and rather short, the enlargement begin- 

 ning before middle, Avith strong separated punctures, transversely 

 depressed before apex, and depressed above in the shape of a 

 fovea; second dorsal with shallow, separated punctures, those at 

 base deeper; second ventral with a prominent tubercle in middle, 

 punctured latex-ally; wings fusco- hyaline, darker in costal cell; 

 nervures and stigma dark; third submargiual higher than long. 

 Length 8 mm. 



Corumba, March; Chapada, April. Two specimens. 

 Eumenes tuberculata n. sp. 



9. — Black; scape, flagellum beneath, mandibles, pronotum 

 except two dark blotches, mesopleura?, two stripes on dorsulum, 

 scutellum, postscutellum in part, two blotches on midflle segment, 

 sides of petiole apically, second dorsal at sides and apex, and 

 apical half or more of second ventral, rufous ; tegulie externally 

 and apical segments testaceous brown; the legs from apex of 

 femora reddish or testaceous- brown ; spot behind insertion of 

 antennj3e, in eye-emargination, hind orbits above, posterior margin 

 of pronotum, dot behind tegulaj, hind margin of postscutellum and 

 apical margin of petiole, yellow; the extent of rufous on abdo- 

 men is variable, and sometimes there is a yellow subapical line on 

 second dorsal; front with deep, rather evenly separated punctures, 

 faintly impressed; clypeus convex about as long as broad, with 

 large, shallow, scattered punctures, terminating in two approximate 

 teeth; thorax with large, deep, separated punctures, largest on 

 dorsulum and scutellum, the latter rugoso-punctate ; pronotum 

 with a distinct medial surface, finely carinated; middle segment 

 depressed posteriorly, above laterally with large deep punctures, 

 otherwise reticulato-puuctate, finest on sides which at base are 

 marked by a series of short folds which are separated from similar 

 folds on metapleurse by an elongate, narrow, smooth area; tegulai 

 impunctate; petiole tolerably stout, about as long as thorax, the 

 enlargement beginning at about middle (the stem therefore longer 

 than in E. tegularu), Avith strong separated punctures, transversely 

 impressed before apex, but with the fovea or pit at summit as in 

 E. tegularis ; punctuation of second dorsal varying, either shallow 

 or deep; second ventral with a prominent tubercle medially; wings 

 subhyaline, broadly fuscous along costal margin to apex; nervures 



