TEXAN HYMENOPTERA. 263 



snow-white pubescence, slightly mixed with brownish within, on inner side 

 are two slender oblique blackish streaks, apical margin black, their tibia; 

 honey-yellow, blackish at base on outer side where the pubescence is pale 

 golden, on the anterior apex there is a small tuft of blackish pubescence and on 

 posterior apex beneath a tuft of long snow-white pubescence, their tarsi pale 

 yellowish-white, with much the exterior appearance of those of for tis, with 

 the posterior fringe paler, and black at extreme base beneath, the first joint 

 more convex outwardly and very deeply and longitudinally excavated or hol- 

 lowed out beneath, the edge fringed with dense blackish pubescence, except on 

 apical anterior edge, second joint rather narrower than first and less than one- 

 fifth in length, third and fourth joints gradually less dilated, claws black at 

 tips; intermediate coxae each with a black acute spine shorter than those on 

 anterior pair, their femora much swollen, their tibiae fulvous anteriorly, their 

 tarsi simple and densely clothed with whitish pubescence, posterior legs with 

 pale pubescence, tips of their tibise reddish, their tarsi with fulvous pubes- 

 cence beneath; abdomen shaped as in fortis, the pubescence pale greenish- 

 yellow, whitish when viewed laterally, the short, dense apical fringe on sec- 

 ond to fifth segments whitish, apex deeply notched centrally, with two or 

 three indentations on each side, beneath the edge is bisinuate on each side; 

 venter with long pale pubescence. Length .55 inch. 



One specimen. (Coll. G-. W. Belfrage.) 



Wegachile xylocopoides. 



Megachile xylocopoides, Smith, Brit. Mus. Cat. i., p. 189. 

 One % specimen. (Belfrage.) 

 Megachile albitarsis, n. sp. 



%. — Black, very densely and minutely punctured; head large, rather 

 broader than thorax, clothed with pale yellow pubescence, very dense and 

 lemon-yellow on face as far up as ocelli, paler on clypeus, on the cheeks it is 

 short and white, very dense beneath, flagellum slightly tinged with brown, 

 apical joint compressed and dilated; thorax with whitish pubescence, dense 

 on pleura and long on sides of metathorax; two spots on mesothorax anterior- 

 ly, one behind each tegulse, and a sutural line before scutellum, of dense pale 

 pubescence; tegulse dull testaceous on outer half ; wings yellowish-fusco-hya- 

 line, dusky on apical margin; anterior legs pale fulvous, their coxas and tro- 

 chanters behind black, the former each with a long subacute black spine, their 

 femora behind with long whit? pubescence, posterior apical margin and two 

 short stripes at apex within black, their tibia? with 6hort pale golden pubes- 

 cence, lower edge fringed with long pale pubescence, inner apical margin 

 black, their tarsi dilated, pale yellowish-white, fringed posteriorly with long 

 dense whitish pubescence tipped with black within, first joint as long as tibite, 

 dilated at anterior apex, the anterior basal margin fringed with blackish pu- 

 bescence, three following joints gradually less dilated, the fourth small, apical 

 joint long, of nearly equal width, claws long, tips truncate and blnck; inter- 

 mediate coxas each with a short acute tubercle beneath, their femora an- 

 teriorly and at tips beneath, as well as their tibia; except beneath, fulvo-ferru- 

 giuous, their tarsi pale yellowish-white, with short snow-white pubescence 

 and fringed behind with long hairs, the first joint flattened, broadly dilated 

 posteriorly, narrowed at base and apex especially the latter, three following 



