458 On some Bees from British Guiana. 



unable to recognise susurrans from Haliday's description. 

 With regard to M. squalens, I have a note that the ventral 

 scopa is pale orange in a specimen in British Museum from 

 Rio Grande do Sul {R. von Ihering). Schrottky cannot 

 definitely decide what squalens is, but indicates M. apicipennis, 

 Schrott., and M. pleuralis, Vachal^ as possible synonyms. 

 New descriptions of both Haliday's species should be made 

 by someone who has access to the specimens. 



CoeJioxys rostrata, Friese. 



1 ? . Courantyne Coast, Berbice, Aug. 1915, inhabiting 

 disused borings in timber {Bodkin), " Not iu B.M." 



A remarkable species, on account of the snout-like clypeus. 

 The specimen is a little smaller than Friese^s type, and the 

 antennae are nearly pure black, but the identification seems 

 certain. It is doubtless parasitic on Megachile stomatura, 



Cmlioxys issororensisy sp. n, 



? (type). — Length about 10*5 mm. 



Kobust, black, with the bidentate mandibles dark red, the 

 teeth black, tegulse bright chestnut-red. Legs dusky red ; 

 first abdominal segment laterally with large well-defined 

 highly polished areas which are dark red ; first three ventral 

 segments very obscurely reddish; face with white hair, 

 faintly ochreous-tinted around antennse; clypeus normal ; 

 antennae entirely black ; eyes dark brown, with short hair ; 

 cheeks narrow, densely hairy, with a depression but no naked 

 area below ; mesothorax and scutellum with very large 

 punctures, the former with a line of pale ochreous hair in 

 front and behind, and a spot behind each tegula; scutellum 

 with an elevated median keel, ending in a short tubercle ; 

 axillary spines moderately long, little curved ; postscutellum 

 with dense yellowish-white hair ; extreme base of meta- 

 thorax with a series of little pits or spaces separated by very 

 short plicae ; mesopleura very coarsely rugoso-punctate, with 

 a strong band of white hair anteriorly and posteriorly. 

 Wings fuliginous, darkest in upper part of marginal cell and 

 beyond ; nervures black ; anterior coxae with short angular 

 projections ; spurs dark red. Abdomen highly polished, 

 rather weakly punctured, with six narrow white hair-bands; 

 sixth dorsal segment finely punctured all over, keeled except 

 basally, narrow and beak-like apically, slightly turned up 

 at end ; fifth ventral angulate apically ; sixth narrow, not 

 notched, sharply pointed, thinly fringed with black hair, 

 not extending far beyond last dorsal. 



