Xylophilus. | HETEROMERA, 91 
The rarity of these insects is well known ; they require special working 
for, and are not often obtained by chance collecting. So far as my own 
observations go, they are chiefly found in oak-woods at elevations of 
from 3000 to 8000 feet ; aconsiderable number of those collected by my- 
self were beaten from the decaying branches of oak.” The earlier stages 
of the Xylophili ave apparently passed in rotten wood. 
I. Antenne with the second and third joints small, 
transverse, about equal in length; eyes nearly 
reaching posterior margin of head . . . . . X. POPULNEUS, F. 
(pygmeus, De G., nee Muls.) 
II. Antenne with the third joint plainly longer 
than second, especially in the male. 
i. Eyes scarcely emarginate, separated by a 
distinct interval from posterior margin of head ; 
thorax about as long as broad . . . . . . X. NEGLECTUS, Duv. 
ii. Eyes plainly emarginate, nearly reaching pos- 
terior margin of head; thorax broader than 
long etn seh.) yit desl woe oc. wollie., X. OOUBATUS; Gyll. 
(pygmeus, Muls., nec De G.) 
X. populneus, F. (pygmeus, DeG., nec. Muls.; boleti, Marsh.). 
Testaceous with the head and abdomen fuscous, dull, obsoletely punctured, 
clothed with rather thin pale pubescence, with a patch towards base of 
elytra and a fascia about middle more or less denuded; head with 
eyes as broad as or a little broader than front of thorax; antenne 
varying in the sexes ; thorax transverse, usually with a curved impression 
at base; elytra much broader at base than thorax, with the shoulders 
well marked, subparailel, rounded behind; legs moderately long, 
testaceous. L. 15-2 mm. 
Male with the antenne longer than half the body, joints 4-10 plainly 
longer than broad. 
Female with the antenne shorter than half the body, joints 4-10 sub- 
quadrate. 
In old trees, dead hedges; also on flowers, &c.; not common ; Dulwich; South Lam- 
beth, Putney, Ripley, Stockwell, Darenth Wood, Lee, Lewisham, Finchley, Wan- 
stead, Weybridge, Horsell, Loughton, Sheerness, Southend ; Birch Wood, beaten out 
of old oaks (S. Stevens) ; Eynsham, Oxon. 
X. neglectus, Duv. (nigripennis, Villa). Testaceous or reddish- 
yellow, with the under-side, except prosternum, fuscous, and the elytra. 
slate-coloured, except the shoulders and hinder portions which are 
reddish-yellow ; it may be known from X. populneus by the longer third 
joint of the antenne and longer thorax, and by having a distinct 
space between the eyes and the posterior margin of the head; from X, 
oculatus it may be separated by the two latter characters, as well as by 
having the eyes scarcely emarginate, and also by the general colouring, 
L. 15-2 mm, 
Old wood, &c.; extremely rare; Wandsworth (Waterhouse) ; New Forest (two 
specimens, Crotch, one specimen, Power) ; I believe that it has also been taken in 
the latter locality by Mr. Janson. 
