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and ventral) ring near its base. Proboscis prominent, and with the 

 broad sucker-flaps ; palpi of the male porrect. with the second joint 

 elongate, ovo-concical, or somewhat pointed, and bearing a long soft 

 pubescence, of the female elongate, pointed, and hanging down against 

 the proboscis. Eyes of the male touching (or almost touching) for a 

 long space, irregularly ovate, densely hairy, and with the facets enlarged 

 except on about the lower quarter and the narrow hind margin ; eyes 

 of the female more circular, widely separated and almost bare. 



Thorax slightly longer than the width, greyish black or greyish 

 brown (in Japanese species) with light grey stripes which are sometimes 

 indistinct and sometimes resolve themselves after the suture into light 

 grey spots. Pubescence on the notum somewhat long and dense, 

 suberect in the male, but sparse and more depressed and mainly light 

 grey in the female ; pubescence on the pleurae longer, shaggier, and 

 paler, excepting on the hypo-pleurae almost bare ; no bristles or 

 bristly hairs occur anywhere. Scutellum lying flat on the entirely 

 hidden metanotum, and bearing a pubescence similar to that on the 

 disc of the mesonotum. 



Wings peculiarly ornamented by curved hyaline or pale markings 

 on the darker ground colour, though in a few species the markings 

 are very inconspicuous, in repose lying roof-like over the abdomen. 

 Venation of the normal type of the Tabanidae, but the upper branch 

 of the cubital fork always with a distinct but short recurrent veinlet near 

 its base ; all the posterior cells wide open. Squamae moderately large, 

 the alar pair extending about half-way across the thoracal when they 

 are against each other, thoracal pair outspread aud in no way covering 

 the halteres ; and both pairs with distinct margins which bear short 



fringes which are inconspicuous except for the tuft of long hairs at 

 the angle. 



Legs simple ; front coxae long, front femora inconspicuously 

 bare beneath ; front and hind tibiae without any spurs, but the middle 



