

MEGACHILE. 



45. Megachile pilosa. 



Female. Length 4| lines. — Black, covered with a changeable golden 

 pile. The face with short pale golden pubescence ; in front of* 

 the insertion of the antennae there is a little black pubescence ; the 

 clypeus strongly punctured, its anterior margin serrated. The 

 thorax with short pale gold-coloured pubescence ; the wings f ulvo- 

 hyaline, the apical margin of the anterior wings fuscous, darkest 

 in a line with and beyond the marginal cell ; the nervures ferru- 

 ginous, the tegulae testaceous ; the thorax beneath and the legs 

 have a thin, short, hoary pubescence, most dense on the tarsi, the 

 posterior pair* fulvous beneath. Abdomen pilose, the fourth and 

 fifth segments with pale fulvous fasciae, the sixth segment densely 

 pilose ; the pubescence on the abdomen beneath is fuscous in the 

 middle and pale at the sides. 



Hab. Eonteboa, on the Amazons. 



46. Megachile vigilans. 



Female. Length 5 lines. — Black, with the extreme base of the ab- 

 domen above and the two basal segments beneath ferruginous. 

 The face with fulvous pubescence; the clypeus naked, punctured, 

 with a shining impunctate space in the middle, its anterior margin 

 emarginate ; the nagellum obscurely fulvous beneath. The thorax 

 with short fulvous pubescence above; on the metathorax it is 

 longer; wings pale fulvo-hyaline, faintly clouded at their apex, 

 the nervures and tegulae ferruginous; the legs obscurely rufo- 

 piceous ; the intermediate and posterior pairs ferruginous beneath ; 

 the tarsi with bright fulvous pubescence beneath. Abdomen 

 shining, covered with fine shallow punctures ; the apical margins 

 of the segments fringed laterally with fulvous pubescence; the 

 apical segment opaque, and covered with a fine cinereous pile ; 

 clothed beneath with pale fulvous pubescence, that on the two 

 apical segments is black. 



Hab. Para. 



47. Megachile constructrix. 



Female. Length 6 lines. — Black. The face clothed with fulvous 

 pubescence ; the clypeus shining and punctured, with the anterior 

 margin emarginate ; the tips of the mandibles ferruginous ; the 

 nagellum of the antennas obscurely fulvous beneath. Thorax 

 shining; the mesothorax finely and not very closely punctured; 

 the scutellum impunctate; the sides beneath and the metathorax 

 with pale pubescence ; the latter has a little that is black behind 

 the wings; the wings subhyaline, the nervures dark, the apical 

 margins faintly clouded ; all the tarsi with rufo-ferruginous pubes- 

 cence beneath ; the anterior pair and also the intermediate fringed 

 with pale pubescence behind ; the spines at the apex of the tibiae 

 pale rufo-testaceous. Abdomen very finely punctured, shining, 



