Mi/'-etocTiares.'] IIETEROAIERA. 31 



The larvae of Mycetochares much resemble those of Eryx ; that of M.lipustulata 

 has been found in rotten oak ; it is furnished with two anal prolegs, but does not 

 appear to present any marked peculiarity. 



BI. bipustulata, 111. ( $ 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, antennae comparatively short and 

 stout, pitchy with the base red ; thorax transverse, Avith 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 striae, interstices sparingly punctured ; femora black or pitchy, 

 tibiae and tarsi clear rod. L. 4|-5| 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, Kipley, Darenth Wood, Lee; Cambridge; Dover; New Forest; 

 Swansea ; Dunham Park, Manchester (Chappell). 



CTENIOPUS, 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 antennie inserted at some distance behind the base of the man- 

 dibles ; the third joint of the antennae, 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 coxae 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. sulphurous, L. ( v. bicolor, F.). Oblong-oval, pale sulphureous 

 yellow, dull ; head finely punctured, eyes prominent, antennae long, 

 pitchy towards apex ; thorax varying in the sexes, very closely and 

 finely punctured, posterior angles obtuse, almost right angles; elytra 

 with obsolete stria?, 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 abdomen deeply impressed, and emarginate at apex. 



Female broader and more robust, with the thorax transverse, deeply 



