66 E. T. CRESSON. 



fulvous tomentose; eyes emarginate ; palpi, mandibles, and three basal joints of 

 antenna? pale ferruginous. Prothorax with dark golden pubescence, the anterior 

 angles acute ; mesothorax coarsely reticulated, longitudinally costate and clothed, 

 as well as scutellum and tegulse, with black pubescence ; scutellum convex, with 

 erect fuscous pubescence; metathorax with angulate sides and a small subapical 

 discal tooth ; tegulse large, elongate, finely scabrous, black, with very short black 

 pubescence. Wings fusco-hyaline, paler at base, then euration much as in onca 

 except that the marginal cell is longer and narrower, and the second submarginal 

 larger and not extending as far out as tip of marginal. Legs, including coxfe, 

 pale ferruginous, the pubesence pale golden ; calcaria short, pale, tipped with 

 hlack. Abdomen strongly punctured, incurved at apex; first segment except 

 base, broad band at apex of second and remaining segments golden tomentose; 

 first segment short, narrow, subnodose at apex, the second flattened above ex- 

 cept apex ; segments 4-6 with a central longitudinal carina; venter deejily, 

 strongly punctured, first segment obtusely toothed beneath. 



Rio de Janeiro (November). One specimen. 



16. M. piiiha %. — Length 8 mm. — Very much like srncora, but smaller, 

 with the golden pubescence less dense and conspicuous; tegulse smooth, shining, 

 nigro-fuscous, paler at apex ; sides of metathorax above more strongly angulate 

 and produced into an obtuse tooth ; calcaria very long, slender, not tipped with 

 black; the golden pubescent bands on abdomen less distinctly defined. 



Rio de Janeiro (November). One specimen. 



The following eight species have the first segment of the abdo- 

 men broad and dilated at the apex, depressed, and not at all nodose, 

 but sessile with base of second segment, and conforming in outline 

 therewith, except in carmo where the upper surface is very short, 

 band-like, the anterior face being abruptly declivous to base of the 

 segment ; head sometimes enormously developed, as in barboza ; eyes 

 generally round or subovate, and more or less convex, not emarginate ; 

 anterior angles of prothorax more or less rounded and obtuse ; meta- 

 thorax rounded laterally and above, unarmed ; tegidse rounded, not 

 elongate, much smaller than in the preceding group : 



Scutellum ful vo-ferruginous Species 17. 



Scutellum black. 



First segment of abdomen depressed, gradually dilated to apex. 



Head enormously developed, cheeks spined Species 18. 



Head not or very slightly broader than thorax, cheeks not spined. 



Large species Species 19 21. 



Small species Species 22-23. 



First segment of abdomen very short and transverse at apex, like a band or 

 collar Species 24. 



