Mycetochares. | HETEROMERA, 31 
The larvee of Mycetochares much resemble those of Eryx; that of M. bipustulata 
has been found in rotten oak; it is furnished with two anal prolegs, but does not 
appear to present any marked peculiarity. 
M. bipustulata, Ill. (¢ scapularis, Gyll.). Oblong, subparallel, 
clothed with rather long black pubescence, black, shining, with a bright 
yellow or reddish-yellow spot at each shoulder, variable in size ; head 
deeply and rather diffusely punctured, antenne comparatively short and 
stout, pitchy with the base red; thorax transverse, with the sides gently 
rounded, very slightly contracted towards base, broadest about or a 
little before middle, posterior angles obtuse, punctuation diffuse, deep 
and rather strong, base with an impression on each side ; elytra with 
punctured striz, interstices sparingly punctured ; femora black or pitchy, 
tibiz and tarsi clear red. L. 44-54 mm. 
Male more elongate than female, with the thorax less transverse, and 
less rounded at sides, and with the eyes larger and more prominent. 
Under bark and in rotten wood of oak, cherry, &c.; rare; Esher, Peckham, Forest 
Hill, Coombe Wood, Ripley, Darenth Wood, Lee; Cambridge; Dover ; New Forest ; 
Swansea ; Dunham Park, Manchester (Chappell). 
CTENIOPUWS, Solier. 
This genus contains about a dozen species, seven of which occur in 
Europe, and the remainder in Siberia and Central Asia, and North 
America ; they may be known from the preceding genera belonging to 
the family by having the abdomen composed of six ventral segments 
and the antennz inserted at some distance behind the base of the man- 
dibles ; the third joint of the antenne, which are long and slender, is 
about as long as or a little longer than the fourth; the mandibles are 
acute at the tip, and the last joint of the maxillary palpi is scarcely 
securiform ; the thorax has the sides almost straight and gradually 
narrowed to the posterior angles which are nearly right angles; the 
tarsi, especially the intermediate and posterior pairs, are long and have 
the penultimate joint simple, and the anterior coxe are narrowly distant 
at apex; our single species is very conspicuous by reason of its brilliant 
sulphur-yellow colour, which fades very much after death. 
C. sulphureus, L. ( ¢ v. bicolor, F.). Oblong-oval, pale sulphureous 
yellow, dull; head finely punctured, eyes prominent, antenne long, 
pitchy towards apex; thorax varying in the sexes, very closely and 
finely punctured, posterior angles obtuse, almost right angles; elytra 
with obsolete striz, interstices very closely sculptured ; legs long, tarsi 
often more or less pitchy. L. 6-8 mm. 
Male more slender and narrower, with the thorax about as long as 
broad, slightly impressed on each side at base, and with the sixth ventral 
segment of abdumen deeply impressed, and emarginate at apex. 
Female broader and more robust, with the thorax transverse, deeply 
