TEXAN HYMENOPTERA. 263 



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

 are two slender oblique blackish streaks, apical margin black, their tibise 

 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 o( fortis, vfith 

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

 anterior pair, their femora much swollen, their tibias 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. Gr. W. Belfrage.j 



Megachile xylocopoides. 



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

 One % specimen. (BelfVage.) 



91 egachile albitarsis, n. sp. 



'^ . — Black, very densely and minutely punctured; head large, raiher 

 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 tegulae, 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 coxae and tro- 

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

 femora behind with long whit3 pubescence, posterior apical margin and two 

 short stripes at apex within black, their tibiae with short 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 black; inter- 

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

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

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

 and fringed behind with long hairs, the first joint flattened, broadly dil;it<'<l 

 posteriorly, narrowed at base and a2Jex especially the latter, three following 



