Records of Bees. 239 



siile of tarsi; appearance exactly like M. kolomelcena, but 

 differing thus : — Lower margin of clypeus sliglitly crenulate; 

 median line of clypeus in middle shining, more or less free 

 from punctures ; punctures of clypeus more distinct ; meso- 

 tliorax with much larger punctures, well separated on disc 

 posteriorly. Wings darker, especially the upper part of 

 marginal cell ; second s.m. larger; b. n. almost meeting t.-m. 



Bahia Blanca, Argentina (L. Bi'uner, 4). U.S. Mational 

 Museum. 



The abdominal scopa is pure black, not brown-black as in 

 M. chuhntana. 



The following key separates five black species which look 

 very much alike : — 



Hair of face (male) pure white except at 



sides ; abdomen closely pimctured .... ^;?'i/;-eHS2s, Ckll. (Peru.) 

 Hair of face (females only known) without 



any white 1. 



1. Ventral scopa light orange-fulvous except 



at apex huascan, Ckll. (Peru.) 



Ventral scopa black, whitish in middle ; 



mesothorax entirely dull eulnlice, Ckll. (Peru.) 



Ventral scopa wholly black 2. 



2. Mesothorax with dense very fine punctures, holomelrena, Ckll. 

 Mesothorax with large well-separated punc- 

 tures on disc posteriorly atramentata, Ckll. 



Megachile brunerieUa, sp. n. 



<J . — Length 10'5 mm. 



Kather broad, but parallel-sided ; black, including the legs 

 and the long slender antennae ; face densely covered with 

 cream-coloured hair ; underside of head with long white 

 hair; vertex with black hair ; mesothorax mostly dull, but 

 shining on disc, closely but rather weakly punctured ; scu- 

 telluni closely punctured, but glistening; mesothorax above 

 witii long hair, mostly white, but black on disc of mesothorax 

 and most of scutellum ; pleura with black hair, but venter 

 with white, and a tuft of white close to base of wings ; meta- 

 thorax with black hair, but postscutellum with white; tegulse 

 piceous. Wings strongly suffused with brown. Anterior 

 femora with a red area on inner surface ; anterior tibise 

 reddened behind ; anterior tarsi obscurely reddish, rather 

 robust, not modified, with a posterior white fringe a little 

 longer than width of tarsi; anterior coxse with very short 

 pointed spines; middle tarsi with shining creamy-white hair 

 on outer side and long hairs behind; hind tarsi with red hair 

 on inner side. Abdomen short, the sixth segment vertical ; 

 first segment with long whitish hair, the others with ochreous 



