120 [January 



yellow pubescence, the lateral and posterior truncations of the latter 

 shining, with a short, appressed. pale silky pubescence ; tegulae ruf'o- 

 t'erruginous. Wings pale yellowish hyaline, with a beautiful violet 

 iridescence, the costa broadly orange-yellow, with a dark fuscous cloud 

 near the tips ; nervures fuscous. Legs black ; the coxae, trochanters 

 and femora clothed beneath with long pale yellowish pubescence; apical 

 margin of the femora, and the tibiae and tarsi entirely rufo-ferruginous. 

 densely clothed with long rufo-fulvous pubescence, very long and bristly 

 on the tarsi. Abdomen velvety-blajjk, silvery-sericeous when viewed 

 in certain lights, clothed with a thin, long, paie pubescence; on each 

 side of the basal segment a large, transverse, apical, deep yellowish 

 spot, almost meeting on the disk; second segment with a large, subtri- 

 angular, apical, deep yellow spot on each side, and the third segment 

 with a transverse mark along the apical margin, slightly dilated at the 

 tip; remaining segments shining black, deeply punctured towards the 

 apex and densely fringed with rather long rufo-fulvous pubescence ; 

 apical segment depressed, rugose and densely clothed with short, ap- 

 pressed, rufo-fulvous pubescence ; beneath shining, black, the secoud, 

 third and fourth segments each with an apical yellowish band inter- 

 rupted on the disk and densely fringed with long yellowish pubescence, 

 the apical segments with rufo-fulvous pubescence. Length 10 lines; 

 expanse of wings 10 lines. 



Male. — Black, with a bluish iridescent reflection, clothed with a 

 short golden-yellow pubescence, finely and closely punctured; the pu- 

 bescence of the head long, dense on the face; clypeus and base of man- 

 dibles yellow, the former with a blackish spot or stain on the disk; 

 antennae entirely dull black, longer than the head and thorax. Tho- 

 rax : on each side of the prothorax a large yellow spot, connected by a 

 transverse yellow line in front of the mesothorax ; in one specimen the 

 whole of the prothorax is yellowish ; the mesothorax immaculate, ex- 

 cept a small spot on each extreme side just behind the teguke ; scutel- 

 lum smooth and polished, with two yellow spots near the base, some- 

 times confluent and forming a broad band, the postscutellum with a 

 broad transverse yellow line ; pleura and metathorax clothed with a 

 dense fine silvery or golden-sericeous pile; tegulae ferruginous, with a 

 yellow spot in front. Wings subhyaliue, with a brilliant golden gloss, 

 and slightly iridescent in certain lights, the costa is broadly tinged with 

 yellowish-fuscous, becoming dusky near the tips; nervures fuscous. 

 Legs slightly pubescent; coxae and trochanters black, silvery-sericeous 

 beneath ; femora also black, with a yellow line beneath ; tibice and 



