244 THE ENTOMOLOGIST. 



(8.) Megachile liewherrya, n. sp., one male. 



Length 13 mm., form of M.fidelis, 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 Jidelis 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 Jiddis ; end of 

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

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

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

 cream-colour, deeply hollowed, shaped as in M. j^ugnata, 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 coxae 

 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 ; tegulse dark ; fringe of 

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

 M. vallorinn, })opuli, chilopoidis, or prusopidis, the sculpture of the thorax 

 being entirely different. 



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



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

 female has not been described ; it is about Tg- 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 algarohiiB, n. sp., one male, three females. 



<y . P^esembles 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 ; tegulae shining dark brown ; mesothorax rather sparsely punc- 

 tured ; malar space much broader than long. Piffers from the female 



