451 Mr. a. Meale-Waldo on 



Tlie above key will serve to differentiate the females; the 

 male of-A\ {Mesotrichia) ahhotti, Ckll.^ is unknown. 



All these three species belong to the subgenus Koptortho- 

 soii<a, Glib. 



For further information on these species, vide Cockerell, 

 Trans. Amer. Ent. Soc. p. 415 (1909). 



Xylocopa [K'qitorthos >mi) cceruJeifonnis, sp. n. 



$ . Nigra ; capite, thorace, tergite prime, tergitibus 2-4 lateribus 



coeriileo-hirtis. 

 Long. 17-18 mm. 

 cf . Nigra; capite, tliorace dense brunneo-hirtis ; segmeiito mediano 



rubro ; abdomiue uigro- vel obscure fusco-hirto ; metatarso iii. 



curvato. 



? . At first sight closely resembling a smtill X. ccendea, 

 F., but at once distinguished by the chaiacters given in ke3\ 



Mandibles shining^ bidentate ; supraclypeal carina shining, 

 conspicuous, not quite reaching the apex of cly])eus ; joint 3 

 of autennjie = 4+ 5 + 6 ; pubescence behind tiie eyes from pale 

 blue to white, and on the intermediate and posterior coxa^ 

 white. Truncation of median segment with a patch of pale 

 yellow hair on each side. Anterior tibiae with long pale b!ue 

 hairs, anterior metatarsi with long pale hair; scopa on inter- 

 mediate and posterior tibise more or less intermixed with 

 pale hairs. Intermediate femora slightly concave on the 

 inner side, posterior femora with a small tubercle on the 

 outer side. Head and abdomen evenly punctured ; meso- 

 notum shining, impunctate in the middle, laterally punctate; 

 median segment rugose. Wings fuscous, only faintlj^ 

 iridescent. 



cJ . Head and thorax densely clothed with fulvous-brown 

 hairs ; face without pale markings; first tergite clothed witli 

 very dark brown (almost black) hair; wings fusco-hyaline, 

 with a bronze effulgence. Eyes large, approximating above. 

 Punctured as in the ? . Tergite 3 witii a curious differen- 

 tiated area on each side at base, only visible when the seg- 

 ments are drawn out ; the area is rounded apically, bounded 

 by a conspicuous sulcus, the portion enclosed being very 

 finely })unctured ; posterior femora somewhat incrassate, 

 concave on inner side ; metatarsus 3 slender and curved. 

 The truncation of the median segment is distinctly rufous. 



Length 16 mm. 



3 ? ?,4 c? c?. 



