Tabanidae. 93 



1. C. rufipes Meig. 



1820. Meig. Syst. Beschr. Il, 71, 6. — 1842. Zett. Dipt. Scand. 1, 126, 

 ti. — 1858. Ltiw. Verh. zool. bot. Geseli. VIII, 625, 13. — 1862. Schin. 

 F. A. I, 41. - 1903. Kat. palåarkt. Dipt. II, 49. 



Male. Eyes not quite contiguous but with a distinct separating 

 line; facets in tlie larger upper part only slightly larger than the iower, 

 the dlviding line not sharp. The black calli on face and yowis large, 

 imited aiong the inner eye-margin. Antennæ black; the first joint 

 thickened, sometimes yellow below; first and second joints with long 

 black hairs. Palpi black, with long hairs, sometimes brown with a 

 black stripe. Thorax brownish with two broad stripes and the side- 

 margin greyish yellow pruinose, most distinct when thorax is seen 

 from in front. The disc is clothed with yellow, pleura and sterna 

 with blackish hairs. Abdomen black, second segment with a yellow 

 orange triangle in the middle, and first and second segments yellow 

 on the sides, the following segments with yellow hind-margins, that 

 are broadest at the hind-corners, the middle triangles being indi- 

 stinct or wanting. Venter black and yellowish, sometimes with a 

 black middle line. Abdomen clothed with black and yellow hairs, 

 the latter chiefly placed in the triangles and at the hind margins: 

 sometimes the abdomen is almost quite black haired. Legs with the 

 coxæ and the greater part of the femora towards the base black, the 

 rest of the femora and the tibiæ yellowish, apical part of front tibiæ 

 black; tarsi yellowish, black towards the ends, front tarsi nearly all 

 black. Halteres brownish black. 



Female. Frontal callus transverse; the calli on face and yowls 

 as a rule separated by a narrow pruinose line reaching close to the 

 eye-margins; epistoma yellow. Antennæ with the two first joints 

 more or iess yellow, often only with a dark stripe on the upper outer 

 side; second joint of palpi yellowish with a black stripe. Abdomen 

 as in the male, but the pale markings more extended and hence the 

 triangles more distinct. Legs all yellow, only the posterior coxæ and 

 the tarsi towards the ends blackish, sometimes the posterior femora 

 more or Iess blackish at the base. 



Lenght 7,5 — 9 mm. 



The pupa is about 12 mm. long; it only shows the two middle 

 of the transverse tubercles, between the bases of the antennal sheaths, 

 and the two tubercles in front of the head are small. 



This species is easily distinguished by its thickened basal joint 

 of the antennæ, and its pale legs. 



C. rufipes is common in several localities in Sealand and it is 

 also found in Jutland. It sometimes abounds in the low herbage at 



