Capside. 235 
P. populi, Linn. (var. distinctus, D. 5 S.).—Grey or 
ochreous, mottled with darker brown or black, sometimes 
(var. distinctus) with the elytra entirely black. Eyes very 
prominent, vertex in the male about as wide as each eye, in 
the ? wider, basal joint of antennez with three black longi- 
tudinal stripes, second joint about twice as long as the first, 
fourth slightly shorter than the third; pronotum with the 
sides slightly sinuate, more or less black posteriorly and at 
the sides, base slightly emarginate in the centre ; scutellum 
with the sides and a central line, widening at the apex, 
pale ; elytra usually more or less mottled with black, and 
clothed with fine silvery hairs intermixed with the darker 
ones, sometimes entirely black, with only a slight pale spot 
near the cuneus, membrane dark, marbled and irrorated 
with grey; femora marbled with black, tibiz with black 
bands, those of the intermediate pair about as wide as the 
intervening white ones. 
L. 6-7 mm. 
I cannot, after comparison of many specimens, distinguish 
var. distinctus except by colour, and I have intervening 
varieties which I am quite unable to refer to either with 
certainty. 
On poplars ; not very common, but generally distributed, 
P. tilie, Fab. (var. marmoratus, D. & 8.).—Green or 
greenish yellow fading to yellowish after death, more or 
less spotted and marbled with black; basal joint of the 
antenne spotted with black, but without black longitudinal 
lines, slightly longer than the apical joint; pronotum 
almost always with a wide, well-defined, black band 
on each side, often continued along the base; scutellum 
and elytra marbled with black, varying much in the extent 
and arrangement of the markings; membrane pale, irrorated 
with grey, giving ita marbled appearance ; femora marbled 
with black, tibize with black bands, those on the imter- 
mediate pair very distinct and clearly narrower than the 
intervening white ones, 
