BEES IN BRITISH MUSEUM. 337 



Megachile pruiua 8m. 9- 



Scopa white, black ou last segment and apical half of penulti- 

 mate one; claws with an acute basal tooth ; last dorsal segment with 

 suberect or erect bristles only at sides. 



Megachile acuta Sm. 9 (T.). 



This is M. latimanus. 



Megachile scrobiculata Sm. % . 



Ohio. Immense spines on anterior coxae ; claws cleft and with 

 an acute basal tooth. Is 31. (Ceratias) pugnata. 



Megachile bucephala Sm. 9 (T.)- 



This also is 31. pugnata. Scopa cream-color, black on last seg- 

 ment ; last two joints of maxillary palpi with some strong bristles ; 

 claws with a sharp basal tooth ; segments 2-4 of abdomen with no 

 pubescent fasciae in basal grooves; third tooth of mandibles as in 

 Ceratias ; cheeks broad, with a great tooth beneath ; clypeus nor- 

 mal for pugnata. A species from Texas is erroneously labelled pug- 

 nata in the Museum. 



Megachile lanuginosa Sm. 9 (T.). 



Runs to 31. petulans in Robertson's table. A small species with 

 white scopa, which is slightly yellowish posteriorly, and black on 

 the last segment ; posterior ocellus distinctly nearer edge of vertex 

 than to nearest eye ; basal joint of hind tarsus about as broad as 

 tibia; there is black hair on vertex and disc of thorax. 



Megachile parallela Sm. % (T.). 



Claws apically bidentate, with no basal tooth ; face densely cov- 

 ered with white hair; hair of vertex and disc of mesothorax dark 

 brown ; anterior femora keeled beneath, the inner face of the keel 

 shining ferruginous ; anterior tibiae red beneath ; anterior tarsi sim- 

 ple. The type has lost all of abdomen beyond second segment. 



Megachile vidua Sm. 9 (T.). 



Posterior half of mesothorax, except at extreme sides, with short 

 black hair; the pubescence has a strong yellowish tint, and the 

 abdomen is shorter than in 31. vionardarum. The clypeus is densely 

 punctured all over, without any well-defined shining median line. 



TKANS. AM. KNT. SOC. XXXI. (43) SEPTEMBER, 1905. 



