Tabanidae. 125 



second with a narrow, pointed middle line, sometimes stretching farther 

 backwards; last segments black. Legs as in the male. 



Length 13—14,5 ram. 



When doubt arises, this species is recognised by having the pro- 

 truding angle of the third antennal joint nearer the base than in 

 rusticiis and the feniora pale to a large degree. 



T. fulvus is very rare in Denmark, I have only seen two females, 

 taken many years ago. This species is also said to frequent flowers. 



Geographical distribution: — All Europe, towards north to middle 

 Sweden; and in Asia Minor. 



Subgenus Tabanus s. str. 



Eyes in both sexes bare or microscopically haired. Ocellar 

 tubercle wanting in the females. 



9. T. bovinus Low. 



1858. Low, Vei-h. zool. bot. Gesellscli. Wien, VIII, 606, 36. — 1842. 

 Zett. Dipt. Scand. 1, 105, 1, p. p. — 1862. Schin. F. A. I, 34, p. p. — 

 1880. Brauer, Denksclir. kais. Akad. Wissensch. Wien, XLII, 185, 44, Tab. III 

 et VI, Fig. 44. — 1903. Kat. palaaikt. Dipt. Il, 60. 



Male. Eyes green, unicolorous; facets of equal size. Frontal 

 triangle and face greyish yellow, with yellow hairs. Antennæ black. 

 the basal joints and the extreme base of the third joint reddish; the 

 upper corner of first basal joint much extended over the second. 

 Second joint of palpi yellow, somewhat ovate, often with a little apex 

 turned downwards, clothed with pale and black hairs. Thorax blackish 

 brown with five indistinct greyish stripes; with short blackish brown 

 and yellowish golden hairs on the disc; pleura and sterna yellow 

 haired. Præalar callus generally somewhat rufous. Abdonien brownish 

 red, with a black dorsal middle line, the fourth segment partiy and 

 the last three segments black, but with the side margins rufous, this 

 colour reaching somewhat in along the hind margins; in the dorsal 

 line pale whitish, or whitish grey triangles; abdomen clothed with 

 black and yellow hairs, the black hairs clothing all the black and 

 some of the reddish parts, the pale hairs cover the whitish triangles 

 in the middle line and form more or less distinct spots on the sides 

 near the hind margins; the triangles nearly reach the front margins 

 of the segments and are as a rule longer than broad at the base. 

 Venter yellowish with a black middle line, more or less interrupted 

 at the incisures ; clothed with yellow and black hairs, the latter only 

 placed in the middle line. Seen from behind the dorsal triangles are 

 silvergrey pruinose. Legs with the femora greyish black with pale 



