180 AN ACCOUNT OF BRITISH FLIES. 
clothed with white downy hairs ; head and palpi brownish. Antennz 
in ¢@ brown, almost white at the tips; in 9 they are yellow, 
and the thorax is yellowish-green, with three dark stripes. Legs pale 
green, tips of all the joints black. Wings pale. Length, 3 to 34 lin. 
C. pedestris, Mg. 
Wings pale, the extremity black. Closely related to the former. 
C. pictulus, Mg. = C. stricticus, F., C. histrio, Zett. 
Black. Wings white, with a dark discal spot and with three pale 
gray spots in the disc of the areolets, two along hind border and one 
towards the tip; anterior veins testaceous, rest pale. Thorax 
grayish, with three black stripes. Abdomen with a pale band on 
hind border of each segment. Legs almost white, hairy, tips of 
joints dark brown. Length, 3 to 3} lin. A large and common 
species. 
C. albimanus, Mg. = C. annularis, Mg., Panzer. 
Shining black; legs long and slender, dark brown, metatars¢ 
white, also posterior tibize. Anterior veins of wings d/ack, rest white. 
Length, 2 to 3 lin. 
C. aprilinus, Mg. 
Yellowish-green ; thorax with three dark brown stripes, sides of 
thorax testaceous, with gray hairs. Abdomen black, with a band of 
gray hairs on the posterior border of each segment, anal segment black. 
Head dark brown. Legs testaceous, tips of the joints brown. 
Wings whitish, costal and two front veins and discal transverse 
veinlet brown. Length, 2} to 3 lin. 
C. nubeculosus, Mg. 
Testaceous ; head dark brown, palpi and antennz black. Thorax 
with three dark stripes. Abdomen black, the hind border of each 
segment being silvery white. Wings whitish, with gray stripes along 
the veins, veins all pale. Legs reddish-brown, long and slender. 
Length, 24 to 3 lin. Not uncommon near most damp places. 
C. maculipennis, Mg. 
Black ; thorax gray above, with four slender deep-brown stripes. 
Abdomen very hairy. Wings white, with gray oblong spots on the 
discs of most of the areolets, veins all pale, the rst, 2nd and 3rd 
sometimes faint brown. Legs dull reddish-brown, coxz and femora 
black, long and slender. Length, 2} to 3 lin. Common, but some- 
what local. 
