74 E. T. CRE8S0N. 



31. JW. alinada 'J, .—Length 13 miu.^Rlack ; head, prothorax arul pleura 

 more or less, thickly clothed with whitish pubescence, slightly raised with black. 

 Eyes round and very convex ; base of metathorax broadly, sometimes interrupted 

 into two spots, apex of basal segment of abdomen and basal corners of second 

 segment densely silvery tomentose, and clothed with long pale silky hair; the 

 apical margin of second segment, the third and fourth entirely and sides of re- 

 maining segments, clothed with longer white pubescence; mesothorax, scutellum 

 and balance of second segment with short black pubescence, longer on apical 

 .segments; scutellum with central shining ridge, the lateral teeth short and com- 

 pressed ; metathorax reticulated, rounded above, declivous behind ; a prominent 

 obtuse tubercle beneath tegulse. Wings hyaline, apical margin broadly fuscous; 

 marginal cell short, not longer than second submarginal, truncate at tip; first 

 submarginal about twice the length of the second, the latter receiving the recur- 

 rent nervure before the middle, the first and second transverso-cubital nervures 

 approximate on marginal; third submarginal either incomplete or the outer 

 nervure indistinct, triangular, narrowed to point beneath. Legs with pale pubes- 

 cence, very sparse on femora; calcaria white. Abdomen with first segment sub- 

 nodoseand subconstricted atapex ; second .segment densely and finely punctured, 

 subopaque ; beneath with sparse pale pubescence, more dense on apical margin of 

 segments 2 and 3 ; first segment with a strong subapical tooth; second segment 

 deeply and sparsely punctured, with a long, narrow, discal pubescent fovea. 



Chapada ; Santa rem. 



32. M. picatia %. — Length 11.5 mm.— Black; head entirely, prothorax, 

 most of pleura, metathorax above, apical half of first segment of abdomen, nearly 

 the basal half of second, and third and fourth entirely, clothed with dense, ap- 

 pressed silvery pubescence, interspersed with longer pale hair. Eyes round, con- 

 vex. Mesothorax, scutellum, balance of second abdcmiinal segment above and 

 apical segment, clothed with black pubescence; scutellum coarsely reticulated, 

 depressed, lateral teeth prominent, obtuse; pleura without tubercle beneath 

 tegulse. Wings subhyaline, brt)adly dusky at apex ; marginal cell truncate at 

 apex, nearly as long as .second and third submarginal cells combined ; outer 

 nervure of third submai'ginal indistinct, the cell narrowed one half beneath ; 

 second submarginal elongate, pointed at base and receiving the recurrent ner- 

 vure befi)re the middle, the first and second transverso-cubital nervures widely 

 separated on marginal. Legs with whitish pubescence, sparse and longer on 

 femora; calcaria white. Abdomen with first segment elongate, nodose and con- 

 stricted at apex ; second segment shining, feebly punctured ; beneath, the second 

 segment is strongly and sparsely punctured, shining, with a narrow elongate dis- 

 cal fovea covered with white pubescence; apical margin of segments 2-4 fimbri- 

 ate with pale pubescence. 



Santarem. One specimen. Clo-sely resembles alinada, but differs 

 by the white pubescence on head, pro and metathorax being more 

 dense; the pleura beneath tegul?e has no prominent tubercle; the 

 wings are darker, with differently shaped cells ; the first abdominal 

 segment more distinctly constricted at apex, the second more shin 

 ing and broadly silvery tomentose at base ; the pul)escence on the 

 fifth and following segments entirely black, etc. 



