BRAZILIAN MUTILLA. 59 



34. Tubercle beneath tegulse obtuse; ventral segments 2 and 3 fringed at apes 



witli pale i)ubescence 36. tapera Cress. 



Tubercle acute ; venter black pubescent 37. serra Cress. 



35. Tubercle beneath tegulte short, obtuse ; pro- and mesothorax entirely black 



pubescent 38 viaiia Cress. 



Tubercle long, acute ; nietatliorax silvery tomentose- . • .41. niaraca Cress. 



36. Head protuberant behind ocelli ; abdomen polished, first segment long, petio- 



late . . • 43. poniba Cress. 



Head not protuberant behind ocelli 37. 



.37. Four posterior legs with black pubescence 40. taboca Cress. 



Legs with griseous pubescence 38. 



38. Abdomen, when viewed from above, entirely black behind base of second 



segment 39. sabara Cress. 



Abdomen with a broad silvery pubescent band behind second segment. 



42. acara Cress. 



The following four species have the abdomen smooth, shining, 

 feebly punctured and ferruginous, the first segment broad and 

 dilated at apex and sessile with the base of second segment; eyes 

 ovate, emarginate, facetted ; clypeus with a more or less well de- 

 fined nasutiform or roof like process at base; prothorax rounded in 

 front, anterior angles not prominent ; mesothorax deeply punctured 

 and longitudinally grooved ; scutellum convex, with a more or less 

 distinct shining tubercle or ridge on disk ; metathorax rounded 

 above and at sides, reticulated, the basal middle with a more or 

 less well defined longitudinal area; tegulse ovate, not unusually 

 large and elongate, as in the next group; anterior wings with a 

 large marginal cell, broadly truncate at apex, and not extending 

 beyond tip of third submarginal, which is complete and distinct. 



Pubescence of abdomen above black, mixed with pale Species 1. 



Pubescence of abdomen above mostly golden Species 2-4. 



1. yt. niacapa '^.—Length 10-11 mm. — Black, shining, abdomen ferru- 

 ginous, apex of segment 5, and 6 and 7 entirely black, the first segment rarely 

 black; the pubescence pale, more dense and pale ochraceous on face, cheeks, 

 prothorax above, pleura, and base of metathorax. Head finely punctured, ver- 

 tex with some black hair; eyesovate, emarginate; tip of flagellum red ; clypeus 

 transversely excavated, with a subtriangular nasutiform process at base, concave 

 and polished beneath. Prothorax rounded on sides anteriorly, with upjier mar- 

 gin pale ochraceous tomentose; mesothorax with short black pubescence and 

 distinct close punctures, a longitudinal groove on each side of disk and a smooth 

 longitudinal subcarinate line on each side over tegulfe, these last ending pos- 

 teriorly in a transverse carinated tubercle; scutellum black pubescent at base, 

 and at apex with long pale hair, convex, punctured, with a small smooth line or 



TRANS. AM. ENT. SOC, XXVIII. JANUARY, 1902. 



