m 



. Wings without any markings, : but rippled all over, practically 



glabrous. Venation quite in accordance with the usual type of Tabanus ; 

 the four posterior cells wide open ; ; anal cell closed long before the 

 wing-margin;; the upper branch of the , .cubital fork without the recur- 

 rent vein let. Alulae strongly developed, rand so large that when, the 

 wings are at rest they are pushed upright against the sides of the 

 scutellum. Squamae very well developed, and with darkened margins 

 which bear a short ciliation except on the alar pair near the angle 

 where there is a conspicuous tuft of long hairs ; thoracal pair largest 

 but not concealed the halteres which are moderate. 



Legs .simple, but with two rather unequal spurs on the middle 

 tibiae ; front coxae long, being about two-thirds as long as the femora ; 

 hind tibiae somewhat ciliated; femora slightly shorter than the tibiae, 

 clothed with soft pubescence except along the underside of the front 

 femora and on a streak behind the apical quarter of the hind femora, 

 these parts being bare from pubescence but not conspicuously shining; 

 the bare part of the underside of the front femora minutely transversely 

 striolate and margined with conspicuous bristles at the inner side ; front 

 tibiae about the tip and the front tarsi beneath or about the sides with 

 peculiar touch-hair, which are analogous to those in the genus Tctbanus. 



Abdomen slightly broader and conspicuously longer than the 

 thorax, rather flattened; pubescence on the surface short and incon- 

 spicuous, but the ventre bears rather conspicuous bristly hairs on the 

 posterior segments. 



This new genus is formed from a species, from Yamato, very like 

 a Tabanus species in appearance, but distinguished from any species of 

 7a&anus by its considerably long process of the basal annulation of the 

 third antennal joint ; it is also distinguished from any species of Dichoela- 

 cera by its wings without any markings. Although the eyes are not 

 distinctly hairy, the type of this genus should be identified with 

 Dichoelacera japoniea, Bigot, as the character that the eyes bear pubes- 

 cence, in many cases, is not valid. Miss Ricardo suggests D. japoniea 



