244 THE ENTOMOLOGIST. 



(8.) Megachile neivherrycB, n. sp., One male. 



Length 13 mm., form of M.fideUs, but differing from that species 

 as follows : — Pubescence white, that of face and abdominal bands pure 

 shining white ; a little black hair on each side of the middle of the 

 mesothorax, but none on the scutellum, vertex, or first three abdominal 

 segments ; fourth segment with very short erect hair, mixed dark and 

 light ; fifth segment with abundant long black bristles ; vertex micro- 

 scopically tessellate» dull, with sparse shallow punctures (in fidelis it 

 has strong close punctures); mesothorax and scutellum sculptured 

 like the vertex ; wings clear, with an apical cloud, stigma very dark 

 ferruginous, marginal cell considerably shorter than in fidelis ; end of 

 abdomen in lateral profile like fidelis, but apex, instead of having a 

 small deep notch, with a broad shallow very jagged emargination ; 

 anterior tibiae black ; anterior tarsi with the process of the first joint 

 cream-colour, deeply hollowed, shaped as in M. pinjnata, but broader, 

 and not quite so produced at the tip ; remaining joints of anterior 

 tarsi cream-colour, but the other tarsi black ; spines of anterior cox?e 

 long, black, blunt, with a prominence about the middle of the outer 

 upper border, whence runs a groove to the tip. The eyes in life are 

 black at the top and sides, otherwise green ; antennae wholly black, 

 last joint slightly broader than the one before ; tegulae dark ; fringe of 

 anterior tarsi orange-ferruginous within. This cannot be the male of 

 M. vallorum, popidi, chilupoidis, or prosopidis, the sculpture of the thorax 

 being entirely different. 



(9.) Lithurgus gihbosus, Smith, one male. 



(10.) Colletes prosopidis, Ckll., one male, one female.— The 

 female has not been described ; it is about Ij mm. long, and 

 resembles the male, except in the usual sexual characters. The 

 flagellum, except the first two joints, is light reddish brown 

 beneath ; clypeus shining, with strong sparse punctures ; no 

 black hair on head or thorax ; tarsi very dark brown, penultimate 

 joint of hind tarsi extremely small. 



(11.) Colletes algarohice, n. sp., one male, three females. 



^ . Eesembles C. prosopidis, but is larger, with the very long 

 flagellum only dull brownish beneath, and conspicuously, though very 

 finely, pubescent ; second submarginal cell much broader, less narrowed 

 above ; enclosure of metathorax with about eight distinct longitudinal 

 ridges, and bounded by a strong single ridge (in prosopidis the bounding • 

 ridge is generally double). The tarsi are clear bright ferruginous ; 

 nervures and stigma very dark brown ; malar space but little broader 

 than long. 



$ . Length 8^ mm., similar to C. prosopidis, but larger ; flagellum 

 wholly dark; the white pubescence of vertex, mesothorax, and scutellum 

 (particularly the last) with blackish hairs intermixed ; hind margins 

 of ventral abdominal segments whitish hyaline. Wings hyaline, ner- 

 vures and stigma black ; abdomen with distinct and broad white hair- 

 bands ; tegulfe shining dark brown ; mesothorax rather sparsely punc- 

 tured ; malar space much broader than long. Difl'ers from the female 



