OF NATURAL UISTORY. 7^8 



M. BREVIS. — Black ; not remarkably hairy ; anterior tarKi 

 simple ; abdomen sliort. 

 Inhabits Indiana. 

 $ Body black, somewhat polished : head densely covi-rod 

 with long, yellowish hairs in front : thorax with whitish hair. 

 sometimes tinged with yellowish, and not concealing the surface: 

 wings a little fuliginous, tinged with violaceous : venter not, or 

 hardly longer than broad : tergum with small, dense punctures, 

 and a narrow, white band on each segment; anal segment trans- 

 versely concave, at its tip cmarginatc, in the middle and on each 

 side, [408] the edge has several small denticulations : anterior 

 tarsi simple : tarsi piceous at their tips. 

 Length less than two-fifths of an inch. 



9 A little larger than the male; with very little hair on thr 

 front ; abdomen short conic-oval ; venter hairy. 

 Length two-fifths of an inch. 



The male of this species closely resembles that of piujiuUius. 

 so much so, that it might readily be considered a.s the same ; but 

 the anterior tarsi are not dilated, and the abdomen, although 

 similarly terminated, is remarkably shorter. 



M. PUQNATUS. — Black ; anterior tarsi dilated in the male, 

 with the first joint prolonged at its anterior angle beyond the tip 

 of the second joint. 

 Inhabits Indiana. 



% Body black, not densely hairy : head densely covered with 

 long whitish hairs in front : thorax with whitish hair not con- 

 cealing the surface : wings fuliginous, tinged with violaceous ; 

 venter longer than broad : tergum with small, dense puncturen ; 

 and a narrow white band on each segment; anal .segment trans- 

 versely concave, at its tip emarginate in the middle, and on each 

 side the edge has several small denticulations : anterior tarsi 

 whitish, dilated, and ciliated; anterior tip of the basal joint pr«»- 

 longcd a little beyond the tip of the second joint, an<l its whoh- 

 length excavated before; anterior tip of the second joint alf" 

 prolonged almost to the tip of the third joint; fourth joint not 

 dilated : anterior tibiae with dilated crowded puncture^n : anteritT 

 coxae, each with a prominent, black spine : intermediate and 

 posterior tarsi piceous at tip. 

 1837.] 



