456 Descriptions of British Diptera. 
antennae black, with the base yellow ; palpi testaceous : thorax and 
scutellum greyish, the former with three black lines on the back, 
and the sides yellow : abdomen yellow, the first segment black in 
the centre, the second with two connivent black spots of a triangu- 
lar shape, the remainder black, with a yellow posterior border, which 
is dilated in the middle and on the sides ; under side dull yellow, 
the base of the segments suffused with brown : thighs dark brown ; 
tibiae rufous, the anterior with the upper half brown ; tarsi like- 
wise rufous, the whole of the anterior pair and the apex of the joints 
in the rest dusky. 
Rather a scarce species, at least in the more northern parts of 
the country ; it is common in the north of France, and will pro- 
bably not be rare in some of the southern counties of England. 
" Occurs in Cambridgeshire, but is much less common than C. 
ccecutiens." Rev. Leonard Jenyns. " Cambridge," Charles C. Bab" 
inglon, Esq. " Near London," Stephens' s Catal. " Ireland." A. 
H. Holiday, Esq. 
CHRYSOPS PJCTUS. 
'Meig. Zwei. ii. 70. Macquart, Dip. du Nord de la France, 166 Chry. 
viduatus, Var. Meig. Klass. i. 158, 2. 
Very similar to the foregoing, but differing in several important 
characters. Hypostome and forehead greyish-white, with several 
glabrous black spots, as in the other species ; palpi and antennae 
testaceous ; the terminal joint of the latter dusky, except at the 
base : thorax shining black, with three longitudinal greyish lines, 
the sides reddish ; scutellum black : abdomen with the first seg- 
ment yellow on the sides, and black round the scutellum ; the 
second yellow, with a small triangular, or rather slightly lunate 
black spot on its middle ; third yellow, with a transverse black 
fascia broadest towards the middle, but having its centre emar- 
ginate behind ; the remaining segments black, with the hinder mar- 
gin yellow : legs yellow, the thighs and last joints of the tarsi black. 
The wings do not differ much from those of C. ccecutiens, but the 
dark clouds are less opaque, particularly the apical one, and not 
covering so much of the wing. 4J lines. 
For a notice of this species, which we have now the pleasure to 
describe, for the first time, as a British insect, we are indebted to 
Charles C. Babington, Esq. who met with it in Monkswood, Hunts, 
June 23, 1829. The above description applies to the female only, 
the other sex does not appear to have hitherto been noticed by en- 
tomologists. 
