Tabanidae. 121 



is the case in all tlie foregoing species, except sometimes in Mi'Mfeldi; 

 on!y the recuived lateral parts of the dorsal plate has a black spot. 



T. solstiUalis is one of the more conimon species here; vicinity 

 of Copenhagen, Ordrup Mose, Furesø, Bagsværd Sø, Hareskov, Ruder- 

 hegn, Hillerød, Fredensborg; Jutland at Dollerup near Viborg and at 

 Mausing near Silkeborg. It occurs from '"k to Vs. I have taken the 

 larva in Bagsværd Sø on -^/s, it transformed to pupa V'e, and the 

 imago escaped "v«; another larva, taken in Furesø on ^^le, transformed 

 **.'?, and the imago came ^''h. The larva was very voracious, one 

 devoured twelve larvæ of Hoplodonta viridula in a few days. Brauer 



I. c. says that the pupa is found in water, I do not think this is cor- 

 rect, my larvæ would not transform in the water, but when I put 

 the fulgrown larvæ in earth they soon transformed. A larva, which 

 I had in captivity for some time, but without feeding it, transformed 

 at last to pupa, but this was small and the imago only measured 

 12,5 mm. 



Geographical distribution: — Middle Europe to France, Siberia 

 and Asia Minor; it occurs in Britain, but there is no sure record of 

 it from Scandinavia. 



Subgenus Atylotus Osten Backen. 

 Eyes hairy in both sexes, sometimes only slightly so in the 

 females. Ocellar tubercle wanting in the females. 



G. T. plebejus Fall. 



1817. Fall. Dipt. suec. 8, 9. — 1842. Zett. Dipt. Scand. I, 121, 24. 

 — 1862. Schin. F. A. I, 31. — 1880. Brauer, Denkschr. kais. Akad. Wissensch. 

 Wien, XLII, 167, 30, Tab. II et V, Fig. 30. — 1903. Kat. palaarkt. Dipt. 



II, 69. 



Male. Eyes with one band or unicolorous, densely and rather 

 long yellowish hairy; eye-facets in the upper two thirds larger than 

 in the lower third part, the dividing line sharp. At the upper eye- 

 margin long. black, erect hairs. Frontal triangle greyish yellow. Face 

 grey with whitish, on the cheeks chiefly black, hairs. Antennæ reddish 

 yellow, third joint only slightly dilated, with an obtuse angle. Second 

 joint of palpi moderately (more or less) thickened, whitish, with 

 whitish and many black hairs. Thorax greyish black, clothed all over 

 with long, woolly, whitish to grayish hairs. Abdomen rather narrow, 

 dark grey, second and third segments with more or less distinct 

 reddish side markings. Venter grey. Abdomen clothed with erect, 

 blackish to grey hairs and with depressed whitish hairs, the latter 

 arranged so as to leave an indistinct dark broad line in the middle, 



