288 Mr. T. D. A. Cockerell on new Bees 



Abdomen of ordinary shape, microscopically tessellate, closely 

 punctured; first segment beneath, and following segments 

 slightly at extreme sides, dark rufous. Apical margins of 

 segments 1 to 5 with a band of orange-fulvous hairs — broader, 

 thinner, and erect on first, narrow and appressed on the 

 others. Apical segment with sparse short greyish pubescence, 

 one might say pruinose. Ventral segment 1 without a fringe, 

 2 and 3 with very long fringes of shining white hairs, fringe 

 of 4 mixed white and black, of 5 black with a few white 

 hairs ; extreme apex with pale brownish hairs. 



(^ . Face densely covered with shining pale yellow silky 

 hairs, an erect fringe of black hairs along top of clypeus; 

 vertex and thorax above with thin foxy-red pubescence. 

 Tegulge ferruginous. Antennte black above ; apical joint a 

 little flattened and broadened ; first joint of flagellum a little 

 shorter than second. Legs largely suffused and blotched 

 with black; tarsi rufous throughout. Anterior legs with a 

 dense long silky fringe behind, the fringe white at base, the 

 long hairs emerging from behind the white ones orange- 

 fulvous. Basal joint of anterior tarsi produced at apex into 

 a long blunt hollow projection ; basal joint of middle tarsi 

 ordinary, but with a very long rather thin fringe of yellowish- 

 white hairs on hind border. Spines on anterior coxse short, 

 flat, and rather broad, blade-like. Hind tibias curved. Apex 

 of abdomen broadly, not deeply, emarginate. 



San Rafael : the female March 3, on flower no. 1 ; the males 

 June 18, on flowers nos. 1 and 29. The flowers are 

 Composita3. 



M. rhodopus is allied to certain of the species found in 

 Brazil. 



(6) MegacMle hidentis^ sp. n. 



? . Length about 6 millim. With a very short abdomen. 

 Black ; head and thorax with thin appressed golden pile, 

 only well seen in certain lights. On each side of the clypeus, 

 and especially along its front edge, the pubescence is denser 

 and conspicuous, pale yellowish. On the front and vertex 

 and beneath each antenna are erect dark fuscous hairs ; such 

 hairs are also scattered over the thoracic dorsum, and there are 

 black hairs just before the tegulse. Head round seen from in 

 front ; occiput deeply concave, meeting the vertex at a sharp 

 angle, which continues down the cheeks. Clypeus strongly 

 punctured, but not so densely as the supraclypeal area. Front 

 strongly mammillate. Mandibles very broad, strongly triden- 

 tate, wholly black. Antennsewholly black. Thorax shining in 



