g. Third segment of the antenna not furnished with a tooth or distinct angular projection.
h. Body covered with metallic scales; front of female of normal width; front and middle tibiæ greatly dilated. L. lepidota. Lepidoselaga Macq.
hh. Body without metallic scales; antennæ not very long, the third segment not cylindrical, not situated on a projecting tubercle; front of the female narrow. South. D. ferrugatus. (= Diabasis) Diachlorus O. S.
gg. Third segment of the antenna furnished with a tooth or a distinct angular projection.
h. Hind tibiæ ciliate with long hairs. S. W. and tropics. Snowiella and Stibasoma.
hh. Hind tibiæ not ciliate.
i. Species of slender build, usually with a banded thorax and abdomen; third segment of the antenna slender, the basal prominence long; wings mostly with brownish markings. Tropic America. Dichelacera Macq.
ii. Species of a stouter build; third segment of the antenna stout, its basal process short ([fig. 161b]). Many species, widely distributed Tabanus L.
dd. With another group of characters.
e. Squamæ small, antennæ variable, thinly pilose or nearly bare species, without distinct bristles; wing veins not crowded anteriorly, R4 and R5 both present, basal cells large; middle tibiæ at least with spurs. Leptidæ