30 HETEROMERA. [ Cistela. 
Male with the antenne longer and the last joint linear; last ventral 
segment of abdomen broadly subtruncate at apex. 
Female with the antenne shorter and the last joint oblong ; last ventral 
segment of abdomen rounded at apex. 
On flowers, &c.; local, but common in many districts and generally distributed 
throughout England, although it appears to be more universal in the London and 
Southern districts, and rarer in the north; Scotland, local, maritime, Dee district. 
I have no record from Ireland, but it almost certainly occurs. 
ERYX, Stephens. (Prionychus, Solier.) 
This genus contains a few species, four of which are found in Europe; 
they may be known by having the penultimate joint of the tarsi furnished 
with a membranous lobe beneath; the antennz are filiform, and have 
the third joint a little longer than the fourth ; the thorax is semicircular, 
margined at base and sides, and with the posterior angles not produced; 
the larva is found in the vegetable mould of decayed oak trees, and very 
much resembles that of Cistela ceramboides ; it is of a yellowish-white 
colour with the head ochreous and corneous (v. Westw. Class. i. p. 310). 
E. ater, F. (2 melanurius, Germ.). Oblong-oval, broad, rather 
convex, black, moderately shining, clothed with very short black pubes- 
cence ; head thickly and distinctly punctured, antennz moderately long 
and robust ; thorax transverse, almost semicircular, gradually rounded 
from base and strongly narrowed in front, distinctly and not very closely 
punctured, with the posterior angles somewhat obtuse; elytra with rather 
fine punctured striz, interstices distinctly and not very closely pune- 
tured; legs moderately long, pitchy or pitchy ferruginous, with the tarsi 
lighter ; the male is a little narrower than the female, and has the an- 
terior tarsi very slightly dilated. L. 10-13 mm. 
{n decaying willow, ash, &c.; nocturnal in its habits, being found on the trunks of 
willows, &c., at night; very local and, as a rule, rare; Coombe Wood, Forest Hill, 
Walthamstow, Stockwell (Surrey), Chatham, Putney, Hammersmith (old apple 
trees, formerly, S. Stevens); Windsor; Norwich; Cambridge; Leominster (Mrs. 
Hutchinson) ; Sherwood Forest (Sidebotham). 
MYCETOCHARES, Laitrcille. 
(Mycetophila, Gyllenhal; Ernocharis, Thomson.) 
This genus contains about twenty species, which are almost entirely 
confined to Europe and North America; of the ten European species 
one only occurs in Britain; the short and stout antenne and short 
tarsi will easily distinguish the genus from Cistela, which it resembles 
in having the penultimate joint of the tarsi not lobed beneath ; the 
antenne have the third joint a little longer than the fourth ; the anterior 
coxe are contiguous at apex, and the last joint of the maxillary palpi is 
slightly securiform. 
