68 E. T. CRESSON. 



enormously developed head. The pubescence on the abdomen is 

 pale sericeous and more dense on apex of first, basal sides of second 

 and on third and following segments. 



19. ]TI. alagoa ^ . — Length 15 ram. — Large, velvety-blaek, clothed with 

 hlack pubescence ; head and thorax densely, confluently punctured. Head trans- 

 verse, not wider than tiiorax ; eyes round, verj' convex, polislied ; ciypeus and 

 mandibles fringed with white pubescence, the former with three minute teeth 

 on apical middle. Anterior angles of prothorax rounded; scutellum convex, 

 with a prominent, shining tubercle on disk ; pleura with an obtuse tubercle be- 

 neath tegulse; metathorax coarsely reticulated, abruptly declivous beliind, 

 clothed with long pale hair; tegulse rounded, smooth and polished. Wings vio- 

 laceous fuscous, the extreme base, a line across first submarginal cell, a furcate 

 streak through second and third submarginals and a spot beneath tip of second 

 submarginal, hyaline; marginal cell long, broad, and broadly truncate at apex ; 

 second submarginal almost as long the marginal, narrowed and pointed at base, 

 receiving the recurrent nervure in the middle; third submarginal sometimesin- 

 distinctly defined, narrowed beneath, also receiving the recurrent nervure in the 

 middle. Legs fringed with long pale pubescence, that on outer side of tibiae short 

 and black; calcaria white. Abdomen clothed with short black pubescence, very 

 sparse on second segment above, which is finely punctured and shining; first seg- 

 ment very bi'oad at apex, obliquely declivous at base, the upper surface very short 

 and transverse, sessile with base of second segment, and clothed with dense ap- 

 pressed white pubescence, broadly interrupted on disk ; base of second segment 

 on each side with white pubescence, also a white pubescent line at extreme side; 

 a band of dense appressed white pubescence on segments 3 and 4 above, interrup- 

 ted medially ; the venter polished, with sparse white pubescence on apical margin 

 of segments 2 and 3; second segment sparsely punctured, gibbous towards base. 



Chapada (January, October). One specimen. A large, black 

 species, with a white pubescent band, interrupted medially, on third 

 and fourth segments of abdomen above. 



20. I»I. aiitliraciiia Gerst. (Archiv. f. Naturg., xl, p. 311).— "J, .—Length 

 14 mm. — Velvety black, the pubescence black. Head narrower than thorax; 

 ciypeus and cheeks with pale pubescence, the former with three small teeth on 

 apical middle; eyes round, convex, polished. Prothorax rounded anteriorly; 

 mesothorax densely and coarsely punctured ; scutellum convex, with a polished 

 tubercle on disk, the apex with long, pale, silky hair ; a blunt tubercle on pleura 

 beneatli teguUe; metathorax reticulated, sloping above and abruptly declivous 

 and flat posteriorly, clothed with long pale silky hair, and two silvery-white to- 

 mentose spots above near base; tegulse round, smooth, polished, with black pu- 

 bescence. Wings and legs as in alagoa. Abdomen shaped and ornamented as in 

 alagoa, except that the pubescence above beyond base of second segment is en- 

 tirely black, except a few white hairs on extreme sides; venter shining, with 

 sparse white pubescence, fringed on apical margin of segments 2 and 3, that on 

 apical segments black; second segment sparsely punctured, gibbous at base, ex- 

 treme lateral margin with white pubescent line. 



Chapada (September). Two specimens. 



