[gii.] G. RiCARDo : Revision of the species of Tabanus. 237 



tenebrosus, Coquillet {7icc W^alker). 

 trigeminus, Coquillet = mandarinus, ]\Iacq. 

 trigonus, Coquillet = yao, ]Macq. 

 yao, Macq. 

 yokoamensis , Bigot. 



Tabanus angusticornis, 9 , lyoew. [? Atylotus.] 



Wien. Entom. Monatsclir., ii, p. 104 (1858). 



From Japan. 



Ashy grey to yellow. Abdomen darker at base, on each side 

 with luteous spots. Eyes short haired. Forehead very wide, 

 with no smooth callus. Antennae ochraceous, narrow, the third 

 joint angulated above. Legs obscurel}' luteous, base of anterior 

 femora, apical half of anterior tibiae, anterior tarsi wholly and four 

 last joints of posterior tarsi black. 



Wings brownish cinereous, stigma and veins dark brown, no 

 appendix. Length of body 5f lines. Length of wing 5 lines. 



Face yellow pollinose and ^^ellow haired. Palpi yellowish, 

 clothed with pale yellowish and black hairs. Antennae : first joint 

 produced, black haired, second black above, third ochraceous, 

 narrow, above angulated, hardh^ forming a tooth. Forehead very 

 wide, yellow pollinose, on vertex and as far as the anterior angle 

 of eyes with ver}' short black hairs, and with no shining callus. 

 Eyes short pilose. Thorax yellow pollinose and yellow haired, 

 intermixed with black hairs, at the base of the wings thicker. Abdo- 

 men blackish, slightly yellow pruinose and with a very large luteous 

 spot on each side from the exterior angle of the first segment , and as 

 far as the posterior margin of the third segment, a blackish spot 

 lying between, which is extended contiguous to the anterior margin 

 of the third segment ; first segment with the borders of the following 

 segments except the last, and lateral borders of abdomen 3'ellow 

 haired, rest of abdomen black haired. Under side blackish, with 

 yellowish ashy grey tomentum, borders of apical segments luteous, 

 pubescence of abdomen for the most part black, at the base, sides 

 and posterior border of anterior segments yellow haired. Legs 

 obscurely luteous, black haired, anterior femora at base, anterior 

 tibiae on apical half, extreme apices of posterior tibiae, whole of 

 anterior tarsi, and posterior tarsi from apex of the first joint, black. 

 Halteres luteous. Wings brown cinereous, yellow before the first 

 longitudinal vein, stigma and veins dark brown, with an appendix 

 (!), first posterior cell at apex subdilated. Loew, Wien. Entom. 

 Monatschr., ii, p. 104. This species is not known to me. 



Tabanus chrysurus, 9 , Loew. 



Wien. Entom. Monatschr., ii, p. 1035 (1858) ; Portschinsky, 

 Horae Soc. Entom. Ross., xxvi, p. 202 (1891) ; C()(|uillft, Proc. U. 

 States Nat. Mus., xxi, p. 309 (i8q8). 



