22 E. T. CRESSON. 



thorax tojiether, basal segment gradually widened at apex, which is as broad as 

 base of second segment and slightly constricted ; apical segment flattened at tip, 

 smooth and shining. 



Head testaceous, paler on each side of vertex, golden sericeous; cheeks and 

 narrow posterior margin of head black; flagellum blackish above; thorax rufo- 

 testaceous above, anterior margin narrowly, a large spot on middle of meso- 

 thorax, and a narrow stripe on disk of raetathorax, black ; thorax laterally and 

 beneath, and the legs testaceous or honey-yellow ; calcaria whitish ; abdomen 

 above honey-yellow, second segment black except narrow basal margin, a large, 

 broad, lunate, ochraceous spot on each side; segments 3-5 clothed with ochra- 

 ceous pubescence; venter dull testaceous, varied with fuscous. 



Saiitarein. Two specimens. 



16. M. tantula 9.— Length 4.5 mm.— Very small; head rather broader 

 than thorax, transversely subquad rate; eyes round, convex, smooth and polished ; 

 thorax short, broad, fiddle-shaped, anterior angles acute, lateral margin of meta- 

 thorax serrate; abdomen about as long as head and thorax together, basal seg- 

 ment gradually dilated to apex, which is as broad as base of second segment. 



Ferruginous; head golden sericeous; apex of antennse fuscous; thorax more or 

 less varied with dusky above, somewhat golden sericeous, the erect hair blackish ; 

 the pubescence at apex of metathorax, on sides of thorax and legs pale; calcaria 

 whitish ; second segment of abdomen above blackish, with two oblong, subovate, 

 dull ferruginous spots, clothed with pale golden pubescence, as are also the fol- 

 lowing segments. 



Coruinha (April). One specimen. 



17. 91, Jaiiuarii Dalla Torra (Catal. Hym., viii, p. 48; pectoraKs\\ Smith, 

 (Descr. New Species Hym. Brit. Mas., 1879, p. 211).— 9 .—Length 7.5 mm. — Small, 

 slender, densely continently puntituied ; head wider than thorax, transversely 

 subquad rate when viewed from above; eyes large, ovate, netted ; thorax without 

 spines or tubercles, rounded above, slightly subcompressed ; abdomen oblong- 

 ovate, basal segment quadrate, depressed, slightly dilated posteriorly. 



Head black ; scape, two basal joints of flagellum, thorax, legs entirely, and 

 most of abdomen, honey-yellow; second segment of abdomen above, except sides 

 and apical margin, black; an indistinctly defined ovate spot of ochraceous pubes- 

 cence on each side of second segment above near base; sides and apex of same 

 segment and the remaining segments clothed with silvery ochraceous pubescence ; 

 calcaria pale. 



Rio de Janeiro (November). One specimen. 



18. M. iiivitata 9 -—Length 6 mm. — ^Small, form slender; head subtrian- 

 gular, transverse, much broader than thorax ; eyes large, ovate, distinctly netted ; 

 thorax closely and finely punctured, rather long, subcompressed, rounded above, 

 slightly narrowed anteriorly and gradually narrowed and sloping behind, sides 

 not constricted or toothed; abdomen ovate, densely, finely punctured, first seg- 

 ment narrow, quadrate, depressed, apical segment rounded above, smooth, shin- 

 ing; venter smooth, shining, except second segment, which is deeply punctured ; 

 apical segment convex. 



