'4 
species live under the damp bark of dead trees, in weeping spots on 
tree trunks, and in decaying vegetable matter generally, such as 
manure, rotting fungi, &c. These terrestrial larvae are usually shorter 
than the aquatic ones, and do not move in serpentine fashion. 
The precise number of species of British blood-sucking midges has 
yet to be determined ; the two figured on Plate I are among the most 
common. 
Genus 
CERATOPOGON, Meigen* 
Ceratopogon varius, Winn. 
Plate i, fig. i. 
This exceedingly minute fly, the female of which measures only 
I \ mm. in length, is, within the personal experience of the writer, a 
vigorous blood-sucker, and, when it is engaged in operations on the 
back of one's hand, its tiny abdomen can be seen increasing in size 
and turning pink as the blood is pumped into it. Blood-sucking 
midges are seldom collected, and the Museum series of this species 
is insufficient to throw much light on its seasonal or local occurrence 
in the British Islands ; but there are specimens from Newmarket 
Cambridgeshire, May 5th ; and Frant, Sussex, June 16th, 1886 
(G. H. Verrall); and from Kingsbury, Middlesex, June 14th, 189 1 
(E. E. Austen). 
The geographical range of this species includes Northern and 
Central Europe. 
* Some few years ago Latreille's genus Culicoides was revived by Kieffer (Bull, de la 
Soc. d'Hist. Nat. de Metz, 2lieme Cahier (Metz : 1901.), p. 143) for the group of species 
which includes Ce7-atopogon varius, Winn., & C. pulicaris, Linn. The author in question 
also introduced three other genera at the expense of the old genus Ceratopogon, which, 
owing to the large number of species comprised in it, was in urgent need of division. For 
the purposes of the present work, however, it has been thought unnecessary to change the 
nomenclature adopted in Verrall's ' List,' 2nd Ed. (1901). 
