452 Mr. T. D. A. Cockerell on 



Trigona williann^ Friese. 

 Five workers ; Rockstoue, R. Essequibo [BodMn). 

 Four were taken 23 March, 1913, one at flowers. One is 

 dated 5. viii. 1913. 



Alegachile stomatura, Cockerel]. 



One of each sex. Courantyne Coast, Berbice, Aug. 1915, 

 constructing nest in disused borings in iimber {G. E, 

 Bodkin) . 



Described (1917) from a single male collected by Busck 

 in Trinidad. The female runs exactly to M. brethesi, 

 Schrott., from Paraguay, in Schrottky's (1913) table of 

 species of tlie Brazilian region. M. brethesi is considerably 

 larger and certainly different. The female of stomatiira may 

 be described as follows: length about or slightly over 9 mm.; 

 head broad, eyes dark purplish brown ; mandibles broad, 

 quadridentate; clypeus densely punctured, but with a smooth 

 shining area in middle, lower margin strongly crenulate ; 

 flagellum hardly at all reddened ; hair of front, sides of face, 

 and cheeks white; mesothorax and scutellum closely punc- 

 tured ; tufts of white hair above tegulse (at hind corners 

 of mesothorax) very conspicuous; tegulse piceous. Wings 

 dilute fuliginous, much darker in marginal cell and beyond. 

 Legs black, hind basitarsi only moderately broadened, with 

 pale orange hair on inner side ; spurs creamy-white. 

 Abdomen broad, cordiform, with narrow bands on hind 

 margins of segments ; ventral scopa white, black on last 

 segment. 



Megachile bodkini, sp. n. 



? . — Length about 8-5 mm., anterior wing 7'Q mm. 



Robust, black, with white scopa, black on last segment. 

 This is very near to M. stomatura^ and, like it, goes exactly 

 to M. brethesi in Schrottky's table. It is certainly distinct, 

 differing from stomatura thus : third tooth of mandibles 

 (counting from outer side) pointed instead of broadly 

 truncate ; margin of clypeus not evenly crenulate, but 

 feebly undulate in middle, and minutely crenulate at sides ; 

 clypeus dull and extremely densely punctured, with a 

 slender shining median line ; supraclypeal area more closely 

 punctured ; hair on sides of face denser, on front and 

 disc of clypeus largely black, but reddish and very thin 

 on apical part of clypeus ; tufts at hind corners of meso- 

 tliorax, and hair on prothorax above, distinctly yellowish : 



