454 Descriptions of British Diptera. 
cylindrical, equal, and pubescent, third elongate and tapering, di- 
vided into many rings, 
the four near the apex 
being generally most 
distinct, (Fig. 1.); pal- 
pi pubescent, the first 
joint short, second 
long, and somewhat 
conical in both sexes, (Fig. 3, c) ; proboscis horizontal in the male, 
vertical in the female, rather slender, the terminal lobes elongated ; 
labrum long and pointed (Fig. 3, .) ; eyes golden green, with spots 
and bands of purple ; ocelli three j tibiae terminating in two minute 
spines ; wings half open when at rest, the anal cell scarcely closed 
at the inner margin. 
Besides several attributes peculiar to itself, the genus Chrysops 
(so named on account of the brilliancy of the eyes,) combines some 
of the separate characters of the preceding and following genera, 
and thus forms a connecting link between them. Its affinity, how- 
ever, to Haematopota is much greater than to Tabanus, as it posses- 
ses, in common with the former, cylindrical antennae, palpi nearly 
alike in both sexes, and spines at the extremity of the tibiae, besides 
presenting some other minor points of agreement. Its most strik- 
ing peculiarities are, the annulated appearance of the whole of the 
terminal joint of the antennae, the presence of ocelli, and the obscure 
coloration of the wings, relieved by a few transparent pale -coloured 
patches. About a dozen species are known to inhabit Europe, but 
of these a very small proportion occur in Britain. In habits they 
are similar to the Tabani, and the larvae, like those of the group 
just named, are said to live in the earth ; but this fact comprises all 
that is known in relation to their early condition. 
CHRYSOPS C^ECUTIENS. (s.) 
Meig. Latr. Macquart, Steph Tabanus csecutiens, Linn. De Geer, vi. 224. 
pi. 13, fig. 3. Donovan, iv. pi. 131. 
Male : black and pubescent ; hypostome yellow, but the ground 
colour almost concealed by two large shining black spots ; eyes with 
two dark-purple bands, the uppermost interrupted ; forehead black : 
thorax with reddish- yellow pubescence on the sides ; abdomen black, 
the second segment with a fulvous spot on each side ; under side 
dark brown, the two first segments yellow, with a brown central 
streak : legs black ; wings brownish-black, with a small hyaline spot 
near the middle, at the side of the discoidal cell, a light-coloured 
