262 , E. T. CRESSON. 



apical segments coarsely punctured and thickly pubescent, apical margin of 

 the segments fringed with a short pale pubescence more or less interruj>ted 

 medially; ventral scopa pale ochraceous. Length .3 5 inch. 



%. — Smaller; head smaller, the face and clypeus more densely pubescent, 

 antennse longer, apical bands of abdomen less obvious, and the apical segment 

 bidentate. Length .30 inch. 



Three specimens. (Belfrage.) 



Megachile fortis, n. sp. 



"J, . — Black, opaque, densely clothed with a pale yellowish pubescence; 

 face with long, dense yellowish-white pubescence, that on vertex and cheeks 

 thin, that on cheeks beneath shorij,.dense and white; head broad, densely and 

 finely punctured; antennse entirely black, with apical joint compressed and 

 dilated ; pubescence of thorax nearly hiding the surface, that on metathorax 

 long, less dense and paler in color; tegulse rufo-piceous; wings fusco-hyaline, 

 faintly tinged with violaceous; legs black, with a short yellowish pubescence, 

 each anterior coxa with a long black spine, their femora honej'-yellow with a 

 blackish stripe behind where the pubescence is dense and pale yellowish, their 

 tibise tinged with honey-yellow within, densely pubescent on outside, the pu- 

 bescence golden-yellow at tip, their tarsi broadly dilated and fringed pos- 

 teriorly with dense long yellow pubescence, mixed with brown within, that on 

 upper surface snow-white, first joint nearly as long as tibise, of equal width, 

 concave within, and with a line of snow-white pubescence, the anterior edge 

 sharply carinate and blackish, fringed with short dense brown pubescence, 

 second joint as broad as first joint and about one-fourth as long, slightly nar- 

 rowed towards apex, fringed like preceding joint, third and fourth joints gradu- 

 ally smaller, apical joint as long as two preceding combined, honey-yellow, 

 claws cleft, black at tip ; four posterior legs formed alike, the tarsi flat, not 

 much dilated, and fringed with long yellowish pubescence, joints of intermedi- 

 ate tarsi more deeply lobed at apex than those of posterior pair; abdomt-n 

 about as long as head and thorax, subquadrate, as broad as thorax, densely 

 and finely punctured, first segment deeply and broadly excavated at base, the 

 sides with long yellowish pubescence, apical margin of each segment except 

 last, fringed with a short dense yellowish pubescence, apical segment subtrun- 

 cate above, not emarginate, beneath tridentate, the lateral teeth rounded, the 

 central one subacute. Length .60 inch. 



Two specimens. (Belfrage.) More robust than /e77iorafa, Smith, 

 the pubescence less dense and paler, the head larger, the apex of an- 

 tennfe dilated, the anterior legs diflPerently formed and the apex of 

 abdomen not emarginate. 



negachile coiuata, n. sp. 



-^ . — Same form as fortis, with the pubescence paler, being of a very pale 

 yellowish-white with a faint greenish tinge, except on face where it is pale yel- 

 lowish-white as in fortis ; on the cheeks beneath there is a patch of dense 

 snow-white pubescence, and on upper part of cheeks a thin white sericeous 

 pile ; apex of antennse pointed, not dilated ; wings hyaline with apical margin 

 pale fuliginous; anterior coxse each with a li)ng black spine, their femora 

 honey-yellow, with the posterior apical margin black and fringed with a dense 



