428 Mr. T. D. A. Cockerell — Descriptions and 



basitarsus appearing black in some positions, but really 

 largely pale straw-colour ; anterior coxse with a short band 

 of red bristles in front ; coxal spines long ; greater part of 

 anterior femora light red. 



Megachile mendozana, Cockerell. 

 Argentina (0. W. Thomas ; Brit. Museum, 1904, 148). 



1 ^- . 



This species was described from the female as cornuta, 



Sm., and rhinoceros, Friese, both preoccupied names. The 



insect before me is certainly the male of rhinoceros as 



described by Vaclial ; it also runs to rhinoceros in Friese's 



table of Argentine Megachile, and to mendozana in Jorgensen's 



]\Iendoza table. It is, however, smaller than the size given 



by Friese for male rhinoceros, and the mesothorax is more 



shining, with the punctures conspicuously larger and less 



dense tlian in a female rhinoceros from JMendoza now before 



me. Tliere are perhaps two species at present confused by 



authors under mendozana or rhinocej'os. 



Megachile parsonsia, Schrottky. 



Argentina (0. IF. Thomas ; Brit. Museum, 1901. 148). 



This agrees with Friese's brief account of ''• siniiUima" 

 from Mendoza, which Jorgcnsen says is to be called ])ar- 

 sonsice. The pallid anterior tarsi have an elongated black 

 spot on the inner side, and the keel of the sixth abdominal 

 segment has six sharp spines. 



Megachile porrectula, n. n. 



A new name is required for M. acuta, Vachal, 1908 (not 

 M. acuta, Smith), from Mapiri, Bolivia. 



Megachile par axanthur a, sp. n. 



$ . — Length a little over 9 mm. 



Black, the Hagellum very obscure brownish beneath ; 

 legs black, the last tarsal joint red at extreme aj)ex, anterior 

 femora with the smooth area which touches the tibiie (wiicu 

 the legs are Hexed) red ; mandibles with a triangular tooth 

 at base beneath ; face densely covered with cream-coloured 

 hair ; rest of head and thorax with dull white or yellowish- 

 white liair, mixed with long black hairs on vertex, scutellum, 

 and especially po^tscutellum ; head and thorax above closely 



