Edemera. | HETEROMERA. 59 
I. Posterior femora of male very strongly thickened ; colom 
~ bright emeraid-green, bluish or reddish, shining . . . O. NOBILIS, Scop. 
IL. Posterior femora of male not or scar cely thickened ; colour 
dark sage-green, dull . . . - «© « « + « + « « « QO. LURIDA, Marsh. 
O. nobilis, Scop. (cwrulea, L.). Elongate, shining, bright green, 
bluish-green or blue, sometimes reddish or coppery ; head subtriangular, 
closely and rugosely punctured, eyes prominent, antenne long and 
slender, dark, metallic at base with the under-side of the basal joints 
yellow; thorax a little longer than broad, widest before middle, uneven, 
rugosely punctured; scutellum small ; elytra separately narrowed from 
base to apex, divaricate, closely and rugosely punctured, with strong 
raised lines; legs long, dark, more or less metallic. L. 8-9 mm. 
Male with the posterior femora very strongly thickened, and the pos- 
terior tibiz strongly thickened. 
On flowers, &c.; generally distributed, and common in many localities, in the 
London, south-eastern and southern districts; Essex; Suffolk ; Gloucester; Bewdley 
Forest; Swansea; Tenby; Barmouth; Conway; it is rare in the midlands and 
western Welsh counties, and has not been recorded from further north. 
O. lurida, Marsh. Of a dull sage-green colour, sparingly clothed 
with fine pubescence, very closely and rugosely punctured; apart 
from its colour it is easily distinguished from the preceding by having 
the elytra only slightly narrowed separately at apex; the thorax is 
scarcely longer than broad, more coarsely punctured than elytra, un- 
even, with a more or less distinct central furrow ; the raised lines on 
the elytra are distinct. L. 6-7 mm. 
Male with the posterior femora scarcely thickened, the fifth ventral 
seginent of abdomen deeply emarginate, and the posterior tibize armed 
with a hooked spur. 
Female with the posterior femora not thickened, and the fifth ab- 
dominal segment entire. 
Grassy places; on flowers; by sweeping, &c.; local; London district, rather 
common, Micklk ham, Caterham, Reigate, Sevenoaks, Lee, Darenth Wood, Dulwich, 
Esher, Cowley, Weybridge, Chatham, &c.; Dover; Hastings; Portsea; Isle of 
Wight; Devon; Bath; Swansea; Barmouth; Cotswold Hills; Bewdley Forest; 
Durham. 
ONCOMERA, Stephens. (Dryops, Fabricius.) 
This is a small genus, containing about half-a-dozen species, three 
being found in Europe, one in Algeria, and one in Japan; our single 
British species is a long and rather conspicuous insect, of very delicate 
consistency and slender form ; it is found very locally onivy bloom; the 
head is considerably produced before the eyes, which are large and kidney- 
shaped ; the antenne are filiform, 11-jointed in both sexes, long and very 
slender, with the second joint very short, and the third and following 
very long, the last being comparatively short ; the thorax is oblong, con- 
stricted at base, much narrower than the elytra, which are of a coriaceous 
