20 ■ E. T. CRESSOX. 



short, fidflle-shaped, densely punctured ; anterior angles of niesothorax rounded, 

 sides without teeth; metathorax obliquely declivous behind, flattened, with 

 large, broad, reticulate punctures, the lateral margins minutely serrate; flanks 

 of thorax smooth and polished ; abdomen elongate, rather longer than head and 

 thorax together, basal segment gradually widened to apex, which is as broad as 

 base of second segment ; apical segment convex, smooth and shining. 



Head black, clothed with golden pubescence; face about base of antennse, man- 

 dibles except tips, and antennae, pale ferruginous; thorax ferruginous, a fuscous 

 stain on each side of niesothorax anteriorly; legs rufo-testaceons, tibiae varied 

 with fuscous; calcaria white; abdomen black, first segment fei'ruginous, all 

 clothed with silvery sericeous pubescence, especially at sides; second segment 

 with two rounded, obscurely reddish si)ots above, covered with silvery pubes- 

 cence; viewed from above the third to fifth segments have each a discal spot of 

 silvery pubescence; beneath, the second and following segments have a trans- 

 verse ferruginous line near apex. 



Chapada (May). One specimen. 



12. in. parata 9 • — Length 8 mm. — Small ; head slightly broader than 

 thorax, transversely subquadrate. scarcely narrowed behind eyes; cheeks longi- 

 tudinally and acutely cariiiate beneath ; eyes rounded, convex, smooth and pol- 

 ished ; thorax short, broad anteriorly, fiddle-shaped ; niesothorax densely punc- 

 tured, anterior angles acute, three teeth on each side on posterior lateral margin ; 

 metathorax broad, depressed, with large, shalUiw, reticulate punctures, becoming 

 smooth at apex, the lateral margin dentate ; flanks of thorax smooth and shining ; 

 abdomen ovate, as long as head and thorax together, basal segment gradually 

 widened to apex, which is as broad as base of second segment. 



Head black, the front golden sericeous, the cheeks silvery sericeous, mandibles, 

 except tips, ferruginous; antennae fusco-ferruginous, paler at base ; thorax ferru- 

 ginous, niesothorax above with black pubescence, longer and pale on metathorax, 

 anterior margin of niesothorax narrowly black; legs ferruginous, tibiae and tarsi 

 more or less tinged with fuscous, calcaria pale; abdomen black, with long 

 scattered pale hair, and apical margin of the segments above and beneath fringed 

 with silvery pubescence; an elongate, sublunate, testaceous mark on each side of 

 disk of second segment above, slender toward base of the segment, the dilated 

 portion toward tip and directed outwardly ; third and following segments above 

 densely clothed with silvery sericeous pubescence. 



Rio (le Janeiro (November). One specimen. 



13. M. biliinata Burm. (Braz. Mutill., 1854, p. 10; melanocephala \\Perty, 

 Del. An. Art., p. 137, pi. 27, fig. 6).— ? .—Length 12 mm.— Eobust; head large, 

 transversely quadrate, broader than thorax, broad between eyes, rounded poste- 

 riorly, cheeks closely punctured, carinate beneath, unarmed ; eyes rounded, con- 

 vex, polished ; thorax fiddle-shaped, broad and square in front, anterior angles 

 acute, on each side a large, flattened, subacute tooth, curved posteriorly, and be- 

 hind it a small tooth ; metathorax depressed, rounded at sides and serrate ; flanks 

 smooth, polished ; legs slender ; abdomen short, ovate, convex ; first segment broad 

 at apex, .sessile with base of second segment and conforming in outline therewith ; 

 second ventral segment finely, not closely punctured. 



