COLLECTED IN DUTCH NEAV GUINEA. 401 



Slender, at least in male sex, loith narroiv elongate abdomen. Body metallic bronze- 

 green, dorsum of thorax with a brassy tinge, and a narrotv, median, cupreous, 

 longitudinal stripe; protJiorax, pleurae, pectus, humeral calli, and a small, roughly 

 semicircular, area on each side immediately above the latter, sides of dorsum of thorax, 

 and first abdominal segment xvhitish pollinose, prcescutellar furr'oiv greyish pollinose, 

 dorsum of thorax without pollinose markings other than those mentioned ; posterior 

 angles or lateral extremities of hind margins of tergites of second to seventh abdominal 

 segments inclusive whitish pollinose ; wings only lightly infuscated, their distal fourths 

 light sepia or drab-coloured, hind borders commencing at distal extremities of anal and 

 axillary cells slightly paler ; front and middle femora and tihice metallic brassy green, 

 hind femora and tibiae metallic purplish-blue {upper surface of hind femora brassy 

 towards distal extremity), upper surface of front and hind tarsi dark metallic blue, 

 upper surface of middle tarsi metallic blue-black. 



Head black, occiput whitish pollinose and basioccipital region clothed with whitish 

 hair, black bristles forming usual transverse row on upper part of occiput relatively 

 rather stout, as compared with those seen in specimens of similar size belonging to 

 other species ; front, except ocellar tubercle and posterior portion of sides, buff polli- 

 nose ; face clothed with maize-yellow pollen, and with bright, glistening, depressed 

 hair of similar colour ; mystax pale yellow, with three long bristles on each side (in 

 the type the uppermost bristle on the right and the two uppermost bristles on the 

 left are black, the other bristles pale yellow); proboscis shining black, 2"75 mm. in 

 length, tip of proboscis bearing a few ochre-yellow hairs above and below ; palpi 

 black, clothed with black bristles, and also, at least on one side, bearing one or two 

 yellowish bristles at the tip ; first and second joints of antennae clove-brown, first 

 joint shining, somewhat elongate, third joint dark sepia-coloured, about one-fourth 

 longer than first two joints taken together, and from a little beyond the base onwards 

 moderately deep in a dorso-ventral direction. Thorax : prothorax clothed with out- 

 standing yellowish hair, main portion of dorsum clothed chiefly with minute, appressed, 

 blackish hairs, which do not obscure the ground-colour, and on each side and poste- 

 riorly are replaced by yellowish hairs of similar character, and above postalar calli 

 by longer yellowish hairs ; pleurae clothed entirely with silvery-white or whitish hair, 

 except the fringe of long hair on the metapleurae, which is wholly yellowish. Abdo- 

 men : tergites of first eight segments clothed on each side with outstanding whitish or 

 yellowish-white hair, lateral extremities of posterior margins of third to seventh 

 tergites inclusive clothed with shorter hair of similar colour, hind margin of eighth 

 tergite, except at each end, and dorsal surface of hypopygium bearing long black 

 hairs, second to eighth tergites, except as already stated, thinly clothed with short, 

 appressed, black hairs, which do not obscure the ground-colour ; when abdomen is 

 viewed at a low angle from behind, extreme hind margins of third to seventh tergites 

 inclusive are seen to be whitish pollinose, though — in type, at any rate — middle third of 



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