Tabanidae. 97 



posterior tarsi yellow, black towards the end; hind tibiæ distinctly 

 ciliated. Wings with the hyaline parts clear. Halteres brown. 



Female. Frontal cailus transverse. Basal joint of antennæ more 

 or less yellow beneath, sometimes nearly all yellow; second joint of 

 palpi yellowish brown, rather long. Thorax with the stripes more 

 distinct tiian in the male, and tlie pubescence more yellow. Abdomen 

 as in the male, but the yellow parts more extended, the black spot 

 on the second segment is so deeply incised, that it consists of two 

 oblique spots, connected in front; the triangies in the middle line 

 larger than in the male, and distinctly greyish, and the abdomen more 

 yellow haired. 



Lenglit 8,5 — 11 mm. 



The pupa is about 13 mm. long. 



C. relictus is found in most parts of Denmark ; vicinity of Copen- 

 hagen, Furesø, Geel Skov, Ruderhegn, Hillerød, Frerslev Hegn, Esromsø. 

 Vordingborg; Lolland at Søholt near Maribo and Nørresø, a lake near 

 Maribo; Funen near Odense and at Lundeborg on the eastern coast; 

 Jutland in Nørreskov, a wood near Vejle, at Silkeborg and at Frederiks- 

 havn. The pupa was found in sand at Furesø. The species is 

 recorded from ^^u^ — ^'/t; pupæ developed -^/«— ^^i«. 



Geographical distribution: — All Europe. 



5. C. coecutiens L. 



176L Tabanus, Linn. Fn. suec. 1888. — 1842. Zett. Dipt. Scand. 1, 

 123, 1. - 1858. Low, Verh. zool. bot. Geseli. VIII, 628, 16. - 1862. 

 Schin. F. A. I, 42. — 1903. Kat. palaarkt. Dipt. Il, 45. 



Male. Eye-facets in the upper two thirds larger than below, the 

 small facets stretching some way up along the hind margin. The 

 calli rather large, but distinctly separated. Antennæ black, the first 

 two joints long haired; second joint of palpi black, rather long. 

 Thorax black, not striped; tlie disc with blackish and yellow hairs, 

 the sides yellow haired, under the wing-root a tuft of yellow orange 

 hairs. Abdomen black, second segment with small yellow side spots; 

 venter black with larger yellow side spots extending over first and 

 second segment; pubescence black on the front part of the dorsaj 

 side, the apical pai't with shining greyish hairs; venter with pale 

 hairs at the hind margins of the segments and towards the apex. 

 Legs black, only the base of the posterior tarsi as a rule brownish 

 yellow; hind tibiæ distinctly ciliated. Wings fumigated to a great 

 extent, the basal spot and the middle band united, only with a small 

 hyaline spot at the base of the discai cell. Halteres black. 



Female. Frontal cailus black, rather large, transverse. First joint 



