XTLOCOPA. 535 



a*. Abdomen very convex, nearly as 



broid as long X. (icutipennis, p. 637, 



b^. Abdomen not so convex, long and 

 narrow, only about two-thirds as 



broad as long X. pictifrons, p. 538. 



b'. Wings fuscous purple at base with 

 reddish coppery effulgence, turning 

 to metallic green at apex. 



a^. Length 23-24 mm X auripennis, p. 538. 



b'^. Length 27-29 mm A', dissimilin, p. 538, 



c'. Wings fuscous with dull purple efful- 

 gence throughout. 

 a-. Abdomen obscure bottle-green . . X. 7ii(/roccsrulea, p. 539. 

 b-. Abdomen black. 



a^. Length 22-24 mm X. fene^trata^ p. 539. 



h'^. Length 13-17 mm X.mnethijstina, p. 540. 



d'. Wings fuscous, deep metallic blue at 

 base, then metallic green, followed 

 by deep rosy coppery red at apex . . X iridipennis, p. 540. 



B. With yellow and black pubescence. 



a. Thorax only with yellow pubescence 



above X. astuans, p. 540. 



b. Occiput, thorax, sometimes also basal 



abdominal segment, with yellow pu- 

 bescence. 

 a'. Yellow pubescence spreading to sides 



of thorax under the wings X. verticalis, p. 541. 



b'. Yellow pubescence not spreading to 



sides of thorax X. bryonim, p. 541. 



C. With black and white pubescence. 



a. Clypeus, front, and face with dense cine- 



reous white pubescence X. basalts, p. 542. 



b. Clypeus, front, and face without or with 



fuscous or black pubescence. 

 a'. Abdomen with white pubescent 



bands ._ X. albofasciafn, p. 542. 



h' . Abdomen with entirely black pubes- 

 cence X. eollaris, p. 543. 



I). With golden brown, sometimes rufescent 



pubescence A', rufescens, p. .543. 



E. With blue and black pubescence X. c^ndea, p. 544. 



Males. 



A. With black or sooty-brown pubescence." 



a. Length 30 mm. and over. 



a'. Scape of antennae flattened and very 



broad at apex A'. latipes, p. 536. 



b' . Scape of antennae cylindrical, only 



slightly incrassate A', tenuiscapa, p. 537 



b. Length under 30 mm. 



a. Wings fuscous with a rich coppery 



bronze effulgence, not blue or green. 



a*. Anterior and intermediate tibiae 



and tarsi with pale golden 



pubescence X'. acutipennig, p. 637. 



