236 

 Group II. — True Bostrichi. 



The head globose, retractile within the thorax. The antennae inserted at the 

 sides of the head, between the base of the mandibles and the eyes. The thorax 

 produced anteriorly above the head. The anterior coxae always approximate. 

 All the joints of the tarsi simple. 



Genus XII. — Xyloterus, Erichs. The funiculus of the antennae four- 

 jointed, the knob solid, the labium parallelopiped. Here belong the 1. Bermestes 

 domesticus, Lin. ; 2. Bostr. lineatus, Oliv. ; 3. Bostr. 5. lineatus, Adams, 

 Ann. de la Soc. Imp. des Natur. de Moscou. 



Genus XIII. — Crypturgus, Erichs. The funiculus of the antennae two- 

 jointed, the knob solid, the labium parallelopiped. The two following species are 

 widely dispersed: — 1. Bostr. cinereus, Herbst. ; 2. Bostr. pusillus, Gyllenhal. 



Genus XIV. — Hypothenemus, Westwood. The funiculus of the antennae 

 three-jointed, the knob obsoletely annulated, the labium slightly narrowed towards 

 the base. The only species known is the H. eruditus, West., Trans, of the En- 

 tom. Soc. of London, part i., page 34, plate 7, figure 1. The author remarks 

 that there is evidently some mistake in the figure of the ligula, for it does not 

 exist in any of the Bostrichidee, as figured by Mr. Westwood. 



Genus XV. — Cryphalus, Erichs. The funiculus of the antennae four- 

 jointed, the knob four-jointed, the labium oblong, scarcely narrowed towards the 

 base. The Apate Tilice and Apate Fagi of Fabricius come here, as also the Bos- 

 trichus asperatus of Gyllenhal. 



Genus XVI. — Hypoborus, Erichs. The funiculus of the antennae five- 

 jointed, the knob quadriannulate, the labium subovate. A small species common 

 in the south of France and Portugal, and indicated as Bostr. fici by Dejean, forms 

 the type of this genus, by the name of H.ficus : it is three quarters of a line long. 



Genus XVII. — Bostrichus, Fab. The funiculus of the antennae five- 

 jointed, the knob quadriannulate and tunicate, the labium triangular. The 

 type of this genus, which is very rich in species, is the Dermestes typographus of 

 Linne. Very few exotic species are known, but the very wide dispersion of some 

 is remarkable, for instance, the Bostr. ferrugineus, Fab., is found in all parts of 

 America, as well as in Madagascar. 



Genus XVIII. — Amphicranus, Erichs. The funiculus of the antennae 

 two-jointed, the knob sub-solid, the labium triangular. The only known and 

 beautiful species is a native of Brazil ; a solitary specimen of it is in the Berlin 

 Royal Museum ; its specific character is A. thoracicus. Niger, nitidus, capite 

 thoraceque sanguineis, elytris subtiliter punctatis, apice oblique truncatis, uni- 

 dentatis — length, three and a half lines. 



Genus XIX. — Corthylus, Erichs. The funiculus of the antennae one- 

 jointed, the knob quadriannulate, the labium triangular. Here come 1. Bostr. 

 compressicornis, Fab., 2. Bostr. fasciatus, Say. 



