264 Me™. Saunders’ Synopsis of 
b. Smaller; second and third joints of an- 
tenn, rather widely pale at the base .. Zeuteri. 
CC. Basal joint of antennz not so long as thorax pini. 
II. Species red-brown. 
a. Basal joint of antenne not thickened, and 
set with strong bristly black hairs; scu- 
tellum without a pale central line .. ulmi. 
b. Basal joint of antennz thickened, and not 
set with strong bristly black hairs; seu- 
tellum with a pale central line o. varipes. 
1. distinctus, Dougl. & Scott. 
Head and thorax brownish-grey, the latter more or less 
clouded with black posteriorly; the basal margin white. 
Scutellum black-brown, with a spot on each side, and the 
apex white. Clavus and corium uniformly black or black- 
brown, with the exception of a square spot above the 
cuneus, clothed with intermixed black and pale-grey hairs. 
Cuneus paler, with the margins more or less darkened ; 
membrane marbled. Femora mottled, especially near the 
apex. Tibiz barred with black. 
Length 3}—4 lines. 
On poplars; Blackheath, &c. 
Easily distinguished by the unicolorous corium from 
all the other species. 
2. longipennis, Flor. 
= dimidiatus, Dougl. & Scott. 
Greyish-brown, indistinctly mottled with lighter colour. 
Legs with thighs mottled, especially near the apex; tibiee 
barred with black. This and the following species (var. 
dubius, Dougl. & Scott) are sometimes very much alike 
in colouring, but this may be distinguished by the longer, 
thinner antennz, longer elytra, which are more indistinctly 
mottled, and by the distinct narrow black rings on the 
intermediate tibiz; it is, also, altogether a more graceful 
looking insect. 
Length 33—4 lines. 
On oaks, &c.; not rare. 
3. populi, Linn. 
Var. = dubius, Dougl. & Scott. 
Sometimes nearly black, mottled with brown, or greyish- 
brown mottled with lighter colour; very variable. In 
the darker varieties the first joint of the antenne is generally 
longitudinally streaked with black ; in the paler varieties 
it is mottled. I cannot, however, imagine that such a 
character alone should be of specific value. 
Length 34 lines. 
On poplar, lime, oak, &e. 
