76 E. T. CRESSON. 



iient. Metatliorax finely and closely reticulated, rounded above, abruptly slop- 

 ing behind, tlie sides angulate near base, the pubescence long, pale, silky ; pubes- 

 cence on niesothorax short and black. Scutellum subconvex, lateral teeth short 

 and compressed. Wings fuscous or pale fuscous, darker on apical third ; marginal 

 cell short, scarcely longer than second submarginal, very broadly truncate at 

 tip; third submarginal cell indistinctly defined or incomplete, extending beyond 

 tip of marginal; second submarginal elongate, pointed at base, receiving the 

 recurrent nervure before the middle, the first and second transver.so-cubital ner- 

 vures widely separated on marginal. Legs with pale ochraceous pubescence, dense 

 on tibiae and tarsi ; calcaria black. Abdomen with a]iex of first segment trans- 

 versely nodose, deeply constricted on apical margin, thickly clothed with long 

 pale pubescence; second segment minutely alutaceous, rather shining, the pubes- 

 cence short and black, except on the two large rounded pale yellow spots, where 

 it is concolorous; extreme basal corners of this segment with a few white hairs ; 

 a band of dense pale ochraceous pubescence, interrupted on middle, on segments 

 4 and 5, otherwise the pubescence is black ; venter polished, sparsely not strongly 

 punctured, the first segment subdentate near apex, second segment without discal 

 fovea, segments 2-5 fringed at apex with pale pubescence, that on the remaining 

 segments black. 



Chapada. This fine species is easily recognized by the two large 

 pale yellow spots on second segment of abdomen above. 



36. M. tapera % . — Length 16 ram. — Large, black, with black pubescence. 

 Eyes ovate, convex, polished. Scutellum convex, lateral teeth obtuse; pleura 

 with an obtuse tubercle beneath tegulge; metathorax rather coarsely reticulated, 

 flattened and declivous posteriorly, clothed with long pale silky pubescence. 

 Wings fuscous, extreme base and a curved line through the first two submarginal 

 cells, ending in a short oblique line or spot in second discoidal cell, subhyaline ; 

 third submarginal cell complete, subtriangular, narrowed, one half beneath ; mar- 

 ginal cell not longer than second submarginal, the truncate apex not extending 

 beyond third submarginal ; second submarginal elongate, pointed at base, receiv- 

 ing the recurrent nervure a little before the middle, the first and second trans- 

 verso-cubital nervures closely approximate on marginal. Legs with black pubes- 

 cence, pale sericeous on inner side of tibiai and tarsi ; calcaria white. Abdomen 

 with basal segment elongate, nodose and constricted at apex, confluently punc- 

 tured, and clothed with long, pale silky pubescence, more dense and white on 

 each side at apex; remaining segments above finely alutaceous, the pubescence 

 black, except a small patch at basal corners of second and a small spot at extreme 

 apical corners of second and third segments which are white or pale ochraceous ; 

 venter shining, second segment polished, sparsely punctured, without discal fovea, 

 the extreme basal middle pinched, the pubescence black, except on first, base of 

 second, and fringe on apex of segments 2 and 3, where it is whitish. 



Chapada Canipo (September). A specimen from Chapada (Oct- 

 tober) differs in having the pubescence on sides of metathorax, first 

 abdominal segment at apex, and the second at base more dense and 

 white, that on the first at apex and base of second being appressed 

 and sericeous. 



