98 STRATIOMYID^ 



is twice as long as the penultimate and thcso two joints form the apical style 

 of which the tip may be microscopically pubescent. 



Thorax shining black, brighter than in 0. j^lKPnrea but not nearly so 

 bright as in 0. formosa, and not densely punctate, with a rather narrow yellow 

 , line from the humeri to the wing-baseand thence (sometimes obscurely) on to 



the postalar calli ; pubescence on the disc short, dense, and black, but longer on 

 the front part, while all about the sides it is longer and is greyish black ; on the 

 pleurse it is longer and is greyish white except on the large bare middle part 

 of the mesopleurge. Scutellum shining black, and bearing short inconspicuous 

 black pubescence ; spines long and dull obscure yellowish or even blackish 

 yellow ; metanotum shining black. 



Abdomen all shining black except narrowly and sometimes only indistinctly 

 on the yellowish hindmargin of the last segment, moderately densely 

 punctate, but not enough to make it appear dull ; imbescence on the 

 disc black and so minute as to be almost imperceptible, but about the 

 basal corners and sides longer and blackish or greyish. Belly all black, and 

 bearing only very short inconspicuous pubescence. Genitalia, when protruded, 

 mainly blackish, and with a pair of short thick lamella. 



Legs black, with the front knees rather broadly orange, and the basal joint 

 of the hind tarsi obscurely orange. Pubescence very slight, but j ust perceptible 

 behind the anterior femora. 



Wings slightly smoky blackish or brownish, with a fairly conspicuous 

 brown or almost blackish stigma, and with the basal and anterior veins 

 darkened ; the darkened basal veins extend only to the base of the discal 

 cell, but the rest of the discal cell is clearly visible though faint ; cubital 

 fork placed at about the middle of the submarginal cell. Squamae (alar) 

 small, blackish, with grey fringes ; thoracal pair absent except for an obscure 

 line. Halteres with large orange knobs. 



$ . Frons nearly half the width of the head, brilliantly shining black and very 

 sparsely punctate, with a pair of widely separated pale yellow almost occipital 

 spots well remote from the upper eye-angles, and with a pair of long narrow 

 transverse pale yellow stripes just above the antennae which unite rectangularly 

 with the equally narrow whitish yellow facial sidemargins, and these in their 

 turn extend clown to the mouth ancl usually connect under the eyes with the large 



Fig. 114. — Oxycera tenuicornis 9- x 32. 



spot on each side behind the lower part of the eyes ;_ face, which is hardly 

 broader than the frons, consequently nearly all shining black ; pubescence 

 on the frons and face very slight and very sparse and all pale yellow, but on 

 the moderate-sized jowls and on the lower part of the back of the head longer 

 and more distinct ; back of the head all very much puffed out, but slightly 

 narrowest about the middle though broad even there, and with a large 

 long pale yellow spot on each side against the eyemargin just below the 

 middle ; on the polished black part of the head above this spot there is 

 scarcely any pubescence, but behind the ocelli there is a minute forward- 

 directed pul)escence. Eyes small but remarkably bulging. Antenna as in 

 the male (tig. 114). 



Thorax shining black, finely and s^iarsely punctate ; humeral knobs and 

 a line along the upper margin of the mesopleuriB yellow, more broadly than 

 in the male and continued rather vaguely beneath the wing-base along the 



