1911.] G. RiCARDO : Revision of the species 0/ Tahanns. 137 



pubescence. Beard white. The palpi very pale yellow, stout at 

 base, ending in a point. 



The male has the abdomen more reddish in colour, darkening 

 at the apex. Large facets of the eyes very distinctly divided from 

 the small ones, which take up barely a third of the eye and reach 

 the vertex as a verv narrow border. 



Tabanus nemocallosus, 9 , Ricardo. 

 (PI. xiii, fig. 6.) 

 Ann. Mag. Nat. Hist. (8), iii, p. 490 (1909). 



Type 9 and another female from Pusa, Bengal, in Howlett 

 coll. 



A medium-sized species, distinguished by the rather broad 

 forehead, not narrower anteriorly, and with no callus or spots. 

 Abdomen blackish brown marked with greyish yellow median 

 and lateral spots. Length 13 mm. 



Face and forehead covered with greyish tomentum, the former 

 with white pubescence. Beard scant}', white. Palpi yellowish 

 white with white pubescence, stout ending in a short point. 



Antennae reddish yellow, the first two joints pale 3'ellow, the 

 third with hardly any tooth. Forehead barely three times as long 

 as it is broad. Thorax, scutelliim and abdomen blackish brown, the 

 former with five distinct greyish yellow stripes, the dorsum with 

 some grey tomentum and with appressed pale fulvous pubescence ; 

 scutellum with the same and with grey tomentum. Abdomen with 

 an almost continuous median stripe formed of grey tomentose 

 narrow, triangular spots, and with irregular-shaped, roundish, grey 

 tomentose spots on the sides, the pubescence on these, short, pale 

 fulvous, some black pubescence on the dark parts, the sides of the 

 first two or three segments pale reddish, under side lighter, covered 

 with grey tomentum. Legs pale yellowish red, the tarsi brown, 

 the pubescence white on femora and tibiae, black on the tarsi. 

 Wings hyaline with brown veins and yellow stigma, a long 

 appendix on branch of third vein. 



Tabanus negativus, cf 9 , n. sp. 

 Type c^ , type 9 , from Formosa, in Dr. Kertesz's coll. 



In Brit. Mus. coll. one female from Hongkong \-ery much 

 mutilated. 



A species allied to Tabanus nemocallosus , Ricardo, but distin- 

 guished from it by the absence of spots on the abdomen and of 

 stripes on the thorax. Wings with no appendix, veins pale 

 yellow. Length of female type 13 mm.; of male specimens ii|-i2^ 

 mm. 



9 . Face, beard, and antennae the same as in the above- 

 mentioned species. Palpi pale yellow, the same shape, but with 



