Epitric.) PHYTOPHAGA. 385 
ceding, with the shoulders almost rounded, and the general punctuation 
considerably finer, the interstices on the elytra being evidently narrower, 
and the pubescence longer; it may be easily known by its colour, which 
is usually black with two rufo-testaceous spots on each elytron, one 
near the base, and the other at apex; these, however, are variable, and 
they occasionally meet and cover nearly all the elytron; sometimes the 
basal spot is absent. Allard considers that this species may be a variety 
of the preceding, but they are really very distinct. L. 14-11 mm. 
Chalky places; on Atropa belladonna ; very local, but in profusion where it occurs ; 
Mickleham, Caterham, Headley Lane; Cotswold Hills (Blatch); Arundel Park, 
where I once found it abundantly on September 5th, 1879; Portsdown Hill, near 
Portsmouth (Moncreaff ). 
CHETOCNEMA, Stephens. 
This genus, taken in its widest sense, as including Plectroscelis, Redt., 
contains about one hundred and forty-five species, of which more than 
half have been described since the publication of the Munich catalogue 
in 1876 ; they are widely distributed throughout the world, representa- 
tives occurring from Siberia to South Africa, and also in the Malay 
Peninsula and the Australian region, India, Central and South 
America, &c.; they are distinguished by the fact that the intermediate 
and posterior tibie are furnished with a tooth on their outer side 
between middle and apex, or to describe it more accurately, are 
emarginate on their outer side before apex, both extremities of the 
emargination being raised into a tooth ; twenty-four species are recorded 
as European, of which, however, ten belong to the genus Plectroscelis, 
which is here regarded as separate ; the genus Chetocnema proper may be 
known by the large head, which has no elevated keel on forehead, 
the large labrum, and the more or less confusedly punctured elytra ; 
there are five British species, which may be distinguished as 
follows :— 
I. Head behind eyes finely punctured; thorax thickly, 
finely, and not deeply punctured. 
i. Form elongate oval ; head closely punctured, duller. 
1. Upper surface always dark blue; average size 
salen eee ee ae ere es ae) (CO RUBC(ERUTRAN Kats. 
2. Upper surface bronze or greenish-bronze ; average 
sizelarger . eet hae 2s tS et Garba Gyllt 
ii. Form short oval, rather broad; head diffusely 
punctured, at all events in centre, more shining . . C. conFuss, Boh. 
II. Head behind eyes comparatively strongly punctured ; 
thorax thickly and rather strongly and deeply 
punctured. 
i, Antenne with the base unicolorous red; colour 
bronze ii" se Sere a) ave vee wwe a Bs ws, vhs ¢ CORHORTONSTSHoures 
(aridella, Payk.) 
ii. Antennee with the upper surface of the first joint 
and apex of the second dark ; colour blue or bluish- 
PIeCND et of te ees ose es ey oN ae seo) PC AMBRE RGT aGyle 
VOL. TV. cc 
