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182 AN ACCOUNT OF BRITISH FLIES. 
/ , § Black, stout. Legs long; posterior tibize whitish- 
C. rogaine’ Wik. is. os black at base and at tips. Length, 24 lin. 
" ( Black.’ Thorax reddish on the sides, and with 
| Bt Pipe | three slender red stripes. Abdomen with a — 
C. venosus, Mg. entice tawny band on posterior edge of each segment, 
and covered with white down. Legs testaceous. 
\ Length, 3 lin. . 2 ag 
Pale testaceous. Thorax with three gray stripes. 
~ Abdomen reddish-brown. Legs testaceous, tips 
of joints dark. Length, £ lin. 
} Pale green. Thorax with three luteous stripes. 
+ Legs as-in rubicundus (9 ). 
} Black. Legs testaceous. Smaller than vemosus. 
a Length, 1 lin. (9). 
\ Hoary. Thorax. with three blackish stripes. 
C. nexilis, Wik... = Abdomen piceous. Legs long and slender, 
. | testaceous, joints dark. Length, 2} lin. (¢). 
4 . | Testaceous, green. Thorax with three brown 
C, snser pens, Wik. +. a stripes. " Legs as above. Length, 2 to 2} lin. 
wre Black. pale brown, joints dark ; fore meta- 
C. plebeius,Mg- +» |" ‘tarsi whitish except at the tips. Length, 2 lin. 
C. rubicundus, Mg. ... 
C. minusculus, Wik. 
C. nigratus, Wik. 
GeEnus.— Orthocladius, V. d. Wulp. a 
Wings naked ; cubital vein straight, simple, bent upwards a little, 
reaching to the end of the costal ; under prong of the postical fork 
straight or bending slightly. Tarsi hairy, the joints darkened ; first 
joint of the anterior tarsi considerably shorter than the tibiz. 
3 genitalia slender. 
O. dolens, Wik. 
“@ black. Abdomen long, very hairy; antenne with black 
plumes. Wings whitish ; costal, cubital and radial veins testaceous, 
the rest whitish; distal transverse veinlet dark brown. Halteres 
brown. Legs brown, long, slender, slightly hairy ; fore tibize and 
fore tarsi very hairy. Length, 4 lin.” Described by Walker. 
O. stercorarius, Dg. = C. chioplerus, Mg. 
Black. Abdomen pubescent. Legs piceous, minutely pubescent. 
Wings pale in @, darker in the 2; the body is also shiny in the 
latter. Antenne black. The larvz which live in dung are described ~ 
on p. 173- ef 
There are a large number of species of this genus named in 
Verrall’s list, but as they are all given in italics, they are only 
described here briefly. 
Black, very stout and hairy. Wings dark at base. 
O. merens, Wik... ... 4 Legs ferruginous and very hairy. Length, 4 lin. 
