386 RHYNCHOPHORA. | Balaninus. 
Male with the antenne inserted in the middle of the rostrum, which 
is shorter than the body. 
Female with the antenne inserted behind middle of rostrum, which 
is longer than the body. 
On birch (Betula alba) and sloe; rare; Esher; Headley Lane (Gorham) ; Coombe 
Wood and Wimbledon Park (Stephens); Plumstead (S, Stevens) ; Exeter (Parfitt). 
B. rubidus, Gyll. (betule, Desbr., nec Steph.). Extremely like 
the preceding in general appearance, but rather smaller, and distinguished 
by having the rostrum considerably shorter and all the femora simple ; 
the legs also are shorter ; the thorax is rather less narrowed in front and 
the scales on the thorax are more even with the lines of lighter ones 
scarcely indicated ; the scales on the elytra, moreover, are greyish white 
instead of being yellowish, L. 25-35 mm. 
On birch (Betula alba) ; often by sweeping herbage under birch trees ; very local, 
but less uncommon than the preceding ; recorded by Mr. Champion as not uncommon 
in the London district and taken by him at Shirley, Mickleham, Farnham and Esher, 
at the latter place in abundance; Forest Hill ; Ashwicken, Norfolk (Power). 
B. villosus; F. (cordifer, Fourc.; cerasorum, F., verisim, sec 
Bedel). Black; base of antenne red ; rostrum black, at all events from 
base to insertion of the antennz, beyond which it is often more or less 
reddish ; in all the preceding species the rostrum is red or ferruginous 
if viewed sideways against the light, even when, if viewed from above, 
it appears partially dark; underside evenly and closely, upper side 
scantily and irregularly clothed with grey hair-like scales, scutellum 
(which is rather large) and a fascia or spot behind middle of each elytron 
thickly clothed with white scales; rostrum long; thorax closely 
sculptured, slightly constricted at apex; elytra with distinct strie, inter- 
stices broad, granulose ; legs more or less thickly clothed with scales ; 
femora with not very large but sharp and distinct teeth. L. 4-5 mm, 
Male with the antennz inserted in the middle of the rostrum which 
is shorter than the body, rugosely striate at base, and red at apex. 
Female with the antennz inserted a little behind the middle of 
rostrum, which is as long as the body, smooth and shining at base and 
brown at apex. 
On oaks and hazels, especially the former ; local, but widely distributed ; London 
district, not uncommon, Mickleham, Ashtead, St. Mary Cray, Darenth, Dulwich ; 
Birch Wood, Rusper, Whitstable ; Suffolk; Hastings; Portsmouth district ; Glanvilles 
Wootton; Swansea ; Devon ; Stoke Wood,rare; Bristol ; Swansea ; Llangollen ; Sutton 
and Knowle, near Birmingham; Burnt Wood, Staffordshire ; Bretby Wood, Repton ; 
Sherwood Forest ; Lincoln; Northumberland and Durham district, rare on hazel ; 
not recorded from Scotland. 
B. salicivorus, Payk. (brassicw, F.? brassice, Brit. Cat.). Black, 
base of antenne reddish-yellow, upper side very scantily covered with 
grey pubescence, scutellum and underside of body, together with the 
metasternum, thickly covered with white scales; rostrum long and 
a ii 
