Holoparamecus.'] CLAVICORNLA. 277 



regards as distinct from 11. depressus, and //. caularum ; H. depressus, 

 however, is so very variable that the species split off from it by various 

 writers must be taken with great caution, and I have therefore preferred 

 to follow the catalogue of Heyden, Eeitler, and Weise in regarding them 

 as synonymous. II. caularum is, of course, very distinct, and is pro- 

 bably our commonest British species. Mr. Olliff is, however, wrong in 

 assigning it to the sub-genus Calyptolium of Villa. In Calyptolium the 

 antennae are 9-jointed in the male and 10-jointed in the female, and not 

 11-jointed in both sexes as stated in the Entomologist ; H. depressus is, 

 therefore, a Calyptobium, and H. caularum a true Holoparamecus, as it 

 is rightly regarded in the last European catalogue. 



I. Antennse 11-jointed in both sexes (s.g. Holopara- 

 mecus, i. sp. ; Tomyrium, Reitter) H. CAULABUH, Aube. 



II. Antennae 9-jointed in male, 10-jointed in female 



(s.g. Calyptobium, Villa) H. DEPBESSPS, Curt. 



K. caularum, Aube (olfnsicornis, Mots.). Entirely testaceous, 

 except eyes, which are black, shining, very finely and sparingly pubescent, 

 and very finely punctured ; head moderately large, rounded in front, 

 eyes somewhat convex ; antenna? 11-jointed with a well-marked 2-jointed 

 club, first and second joints rather laige, 3-8 subglobose, ninth trans- 

 versely globose ; thorax cordiform, a little longer than, or about as long 

 as, broad, with sides strongly rounded in front and strongly constricted 

 behind, with four fovea? at base, of which the two central ones are usually 

 confluent, and often form a transverse line which is deeply impressed in 

 the centre ; elytra oblong-oval, very finely and irregularly punctured. 

 L. 1| mm. 



In hot-beds and decaying vegetable matter ; Withington, Cheshire, in dung-heaps 

 (J. Chappell) ; Manchester district ; Mr. Olliff records a single example as taken by 

 Mr. Oliver Janson in July, 1869, " crawling on a wintered wall, at the base of which 

 was a quantity of decaying vegetable matter ;" he does not, however, give the locality ; 

 Mr. Chappell has found a considerable number of dead specimens of the species, and 

 has distributed several of -them, with his usual liberality, under the name of H. de- 

 pressus. 



XI. depressus. Curt, (singularis, Beck ; Villce, Aube ; populi, Mots.; 

 longipennis, Mots.). This species in general appearance very closely 

 resembles the preceding, but may easily be distinguished by the fact that 

 in the male the antennae are 9-jointed and in the female 10-jointed ; the 

 thorax is shorter and proportionately broader and less constricted be- 

 hind, and usually has a fovea on disc, and the elytra are rather more 

 coarsely punctured and slightly broader with the sides straighter ; 

 besides the difference in the number of the joints of the antenna, the 

 female differs from the male in being a little larger, more elongate and 

 depressed, with the eyes less convex, and the impressions at the base of 

 the thorax deeper. L. 1-lf mm. 



In flour, &c. ; also occasionally on the wing, and rarely in hot-beds, &c. j it is a 



