200 SERRICORNIA. [Dinodem*. 



DINODERUS, Stephens. 



This genus contains about eight species, of which two are found in 

 Europe ; three have been described from North America, and one from 

 Teneriffo ; they are cylindrcal insects, but less convex than some of the 

 other members of the family, from which they also differ in not having 

 the thorax drawn forward over the head ; in one or two points the genus 

 forms a connecting link with the Lyctidae, and Thomson (Skand. Col. 

 v. 201) includes it under that family. 



X>. Bubstriatua, Payk. Elongate, subcylindrical, pitchy black, 

 slightly pubescent ; head broad, rugosely punctured, with a transverse 

 impression between antennae; antennae inserted in front close to the eyes, 

 with the basal joint short, robust, the second subglobose, the five follow- 

 ing minute, and the last three forming an elongate rufescent club, of which 

 the two basal joints are slightly produced internally, and the terminal 

 one is subglobose and compressed ; eyes very convex ; thorax subquad- 

 rate, very globose and thickly tuberculated in front, with the tubercles 

 slightly acuminate and largest towards anterior margin ; elytra often 

 lighter than thorax, retuse behind, deeply and coarsely punctured, with 

 the punctures irregularly and closely placed, but rarely disposed in 

 striae; legs pitchy red, with tibiae and tarsi paler ; tibia) compressed, 

 toothed externally, tarsi short, simple. L. 3 mm. 



In decayed trees ; very rare ; Darenth Wood (where an example was taken on the 

 wing by Mr. G. Lewis); New Forest (Stephens) ; Skellingthorpe, near Lincoln (Rev. 

 11. Matthews). 



RHIZOPERTHA, Stephens. 



This genus is cosmopolitan, and of almost universal distribution; it 

 contains about thirty species, of which two have occurred in Europe ; 

 our single British species occurs in foreign seeds, old flour, ship's 

 biscuits, &c., and is evidently an importation, although it has to a certain 

 extent become naturalized ; it may be distinguished by the elongate 

 last joint of the tarsi, and the strongly and broadly serrate club of the 

 antennae. 



XL. pusllla, F. Oblong, subcylindrical, brownish-red or reddish. 

 Lrown, almost glabrous ; head rather large, with eyes moderately pro- 

 minent, antennae reddish, with the two first joints large, and the last 

 three forming a strong serrate club ; thorax longer than broad, slightly 

 narrowed in front, with all the angles rounded, convex, rugosely punc- 

 tured, scabrous and tuberculate in front; elytra long, parallel-sided, 

 with regular rows of coarse punctures, much depressed at apex ; legs 

 ferruginous, tarsi apparently 4-jointed, with the last joint slightly longer 

 than the preceding taken together. L. 2 mm. 



In roots and iccds imported from abroad, old flour, biscuits, &c,, also in wood of 



