296 Professor Williston on the 



Front and rostrum light opaque orange-yellow, the former with 

 an angular spot posteriorly, not continued into a stripe, subshining 

 bluish. Antennae yellow, the terminal joints brownish. Pro- 

 notum light opaque yellow in the middle, black on the sides ; 

 mesonotum opaque yellow, with light brownish-red, shining 

 stripes ; the lateral ones curve strongly outward iu front, and 

 terminating in an opaque black spot ; a similar spot just back and 

 below these, and a third velvety black spot immediately above the 

 root of the wings, extending narrowly into the suture. Scutellum 

 shining brownish-red. Metanotum yellow, with a stripe of the 

 colour of the scutellum, expanded triangularly behind. Pleurae 

 light sulphur-yellow, with shining reddish spots. Abdomen light 

 opaque orange-yellow ; the first four or five segments with incon- 

 spicuous brownish bands. Knob of halteres brown. Coxa;, 

 femora, and tibiae yellow, the two latter black at the tip ; tarsi 

 black, the proximal joints somewhat yellowish. Wings with 

 a brownish-yellowish tinge ; costal cell yellow ; stigma pale 

 brown. 



^. Antennas darker, the basal three or four joints yellow. 

 Markings of thorax ; abdomen and legs somewhat darker. 



One male and two females. ^J he species seems nearest 

 allied to P. consularis, O. S., but will be at once dis- 

 tinj^uislied by the colour of the thoracic stripes and the 

 additional black spots. 



POLYMERA. 



Wiedemann, Auss., Zw, Ins., i., 57, 1828. 



1. Polymera alb'dn.rsls, n. sp. (PI, X., figs. 71, part of 

 antenna $ ; 71a, antenna ? ; 7 1 6, wing.) 



cJ , 9 • Front, pa'pi and rostrum brown. Antennae brown, the 

 basal joints yellowish. Thorax brownish-yellow, the pleurae in 

 the middle blackish. Abdomen dark brown. Legs luteous, the 

 base of the femora yellow ; tarsi white, except the metatarsi of the 

 two anterior pairs, the proximal end of the second joint of the 

 same pairs, and of the metatarsi of the hind pair, which are 

 brown. Wings distinctly tinged with brownish. Length 6-7 mm. 



Four specimens. Hitherto, only South American 

 species of this genus have been made known, from which 

 the present species seems distinct. The male antennae 



