Dorytomus.| RHYNCHOPHORA. 275 
and Durham district, apparently rare; Scotland, rare, Solway, Tweed, Forth and 
Clyde districts. I know of no record from Ireland, bat it almost certainly occurs in 
that country. 
D. tremule, F. Fusco-ferruginous, occasionally light ferruginous, 
with ashy pubescence, which is much variegated on elytra ; head closely, 
but rather distinctly punctured, rostrum long and slender, shining 
black, glabrous, curved and striated; antenne lighter or darker red ; 
thorax transverse, with the sides rounded, broadest a little before 
middle, rather finely punctured, with a raised central line which is 
more distinct in front; elytra oblong, scarcely broader at shoulders 
than thorax; legs stout, lighter or darker red, femora robust and 
clavate and armed with a strong tooth. L. 4-5 mm. 
Male with anterior tibiz produced into a distinet angle in the middle 
of their inner side, and the rostrum more distinctly striated ; teeth of 
femora very strong. 
Female with the anterior tibie almost straight, and the rostrum less 
distinctly striated ; teeth of femora less strong. 
On Populus alba (White Poplar) and Populus tremula (Aspen); rare; Birch 
Wood, and Swanscombe Wood, near Gravesend, Kent (on young aspens at the end of 
June); West Wickham (T. Wood) ; Glanvilles Wootton (Dale); Fordlands, Devon 
(Partitt}; Bristol; South Wales; Knaresborough, Yorkshire, and near Carlisle 
(Heysham) ; the stouter form, broader thorax and more robust legs will separate it 
from the allied species. 
D. tortrix, L. One of the most distinct of all the species; pale 
testaceous, rather shining, almost glabrous, with thin and scanty uneven 
pubescence, and not variegated ; breast fuscous ; head closely punctured, 
rostrum moderately long, slightly curved, shining, finely striated and 
punctured ; thorax transverse, finely but evidently punctured, with the 
central line not very distinct; elytra with rather strong punctured 
striz, interstices finely punctured ; legs pale testaceous yellow with the 
femora slightly clavate and dentate. L. 5-6 mm. 
Male with the antennz inserted further in front of middle of rostrum, 
and the teeth of the femora stronger. 
On aspens and willows, local but not uncommon where it occurs; Dulwich, 
Darenth Wood, Caterham, Hampstead, Cowley, The Holt, Farnham, Swanscombe 
Wood, near Gravesend, &c.; Norfolk; Suffolk; St. Peters, Kent; Glanvilles 
Wootton ; Devon; Bristol; South Wales; Midland districts, widely distributed ani 
found in many localities ; Scarborough; Alton, near Manchester; Northumberland 
and Durham district, Twizell and Durham; Scotland, on aspens and Lombardy 
poplars, Solway, Forth, Dee, Moray and probably other districts; Ireland, near 
Dublin and Beltast, and probably widely distributed. 
D. hirtipennis, Bedel (teniatus, Brit. Cat., Gyll., Thoms., nce Bey 
Fuscous, or fusco-ferruginous, dull, clothed with rather thick greyish 
pubescence and with small raised black sete on the elytra which are 
plainly visible at the sides; the thorax is either fuscous, or ferruginous, 
or ferruginous with a fuscous spot in the centre, and the elytra are varie- 
es 
