382 TABANID^ 



large central space. Palpi long ; end-joint elongate elliptical and barely 

 pointed, yellow, and clothed with numerous short black bristles on all the 

 outer side except towards the upper part but with longer pale yellow hairs 

 about its base ; basal joint also with long pale yellow hairs. Eyes clothed 

 with dense short brownish hairs, touching for a very long space ( = two-thirds 

 the distance from the occiput to the antennee) ; facets anteriorly and on almost 

 the upper three-quarters much larger than those on about the lower quarter 

 and on a rather broad zone which extends all up the hindmargin to the 

 vertex, the transverse dividing line between the facets being sharply defined 

 and sloping down from the front part until it curves round to the hinclmarginal 

 zone ; in life the eyes are beautifully opalescent green and (according to 

 Brauer usually) without any dark transverse band. Antennae orange ; two 

 basal joints with short black dorsal bristles, but on the outside of and 

 beneath the basal joint there are longer yellowish bristly hairs ; third joint 

 moderately long, with the dorsal hump obvious and occurring much nearer 

 the base than the middle and with some minute black bristles on it ; style- 

 like portion rather shorter than the basal segment of the third joint, 

 with its last segment conical and not very thin and with microscopical apical 

 bristles. 



Thorax and scutellum brownish black but rather grey on the front part, 

 clothed with dense brownish yellow sloping and tangled pubescence, and 

 with numerous but inconspicuous erect black hairs all over except on the 

 front part ; pleurte ashy grey with long dense brownish yellow pubescence 

 on the upper hind part of the mesopleurae and on the upper and hind parts 

 of the metapleuras (close to the tuft on the squamae), but more sparsely 

 pubescent elsewhere. 



Abdomen not at all conical, conspicuously brownish orange with a more 

 or less broad (about one-third the width of the abdomen) blackish dorsal 

 stripe and with the tip blackish, but with all the actual sidemargins orange ; 

 this dorsal stripe begins on the whole breadth of the basal segment and 

 contracts to about the middle third of the hindmargin of that segment, and 

 then gradually narrows to the end of the third segment, the fourth and 

 subsequent segments being almost entirely blackish, tliough tlie orange hue may 

 extend somewhat down the sides of the dorsal stripe on the fourth segment, 

 and the blackish sides of the fourth segment may extend faintly upwards 

 near the sides of the third segment, and there may be a small round isolated 

 blackish spot near each side of the second segment right in the middle of the 

 orange part. Pubescence all over composed of moderately dense sloping 

 glistening oi'ange thin hairs, amongst which abundant though inconspicuous 

 more bristly black hairs occur which are longer (and when viewed sideways con- 

 spicuous) and erect on all the middle jiart of the disc of the second segment 

 and on the basal segment ; sidemarginal pubescence rather conspicuous, out- 

 spread, and orange except for the blackish hairs at the sides of the basal 

 segment ; the dense orange pubescence and dust sometimes obscure the black 

 dorsal stripe and tip. Belly orange with a broad continuous middle stripe, 

 wliich however may only extend to the third segment or to a point on the 

 fourth segment, the remaining segments being then wholly orange on to the 

 sixth segment but leaving the tip blackish ; sometimes the black middle stripe 

 widens out on the second segment towards the sides, and sometimes the sides 

 are blackish ; pubescence short dense and pale yellow, but the usual black 

 bristly hairs beneath the seventh segment fairly conspicuous. 



Legs mainly orange, but blackish on the coxae, on nearly the basal half of the 

 front femora, on quite the basal half of the middle pair, on more than tlie 

 basal half of the hind femora, on about the apical half of the front tibial, 

 and on the tip of the posterior tarsi (beginning to darken soon after the basal 

 joint), while the front tarsi are deep black ; trochanters brownish. Pubescence 

 on the anterior femora rather long and dense behind, greyish yellow about 

 the base but growing blackish about the tip, and the bare subfemoral space 

 rather narrow and inconspicuous with the tiny bristles on its anterior 

 margin veiy small and inconspicuous ; pubescence on the hind femora less 

 dense but longer and more extended to the underside, and with only a 

 few black hairs about the tip ; front tibiae with a few longer black hairs 

 postero-dorsally, but otherwise covered almost all over with short depressed 



