OERAMBYCID^. 151 



C. dentatua is closely allied to C. hideiitatus from which it may 

 be known by the comparatively longer elytra, narrower thorax, much 

 narrower space between the produced teeth of the thorax, closer 

 punctuation and longer pubescence ; the anterior angles of the thorax 

 are not produced in front at the sides as in the latter insect. 



CERAMBYCID^E. 



ASEMUM, Eschscholtz. 

 A. striatum, L., var. agreste, F, (Mant. i. 152). This is the 

 variety with light brown elytra ; it is usually considered rare, but has 

 been taken in some numbers in the New Forest; it has also occurred 

 near Reading, and at Bournemouth. 



CRIOCEPHALUS, Mulsant. 

 Criocephalus, Muls. (Col. de Fr. Longicorn, 1"^ ed. 65, 2® ed. 

 125); Arhopcdus, iStepli. (Man. Brit. Ent., 273). Large insects; 

 elongate, subparallel, not convex, very finely pubescent ; head deflexed, 

 almost perpendicular, with a distinct furrow between the eyes and a 

 strong depression in front ; eyes convex, reniform, distinctly, but not 

 strongly emargiuate. Labrum small, labium rather short, broadly and 

 shallowly sinuate with the lateral anterior lobes produced and rounded ; 

 maxillaiy and labial palpi long and slender ; antennae longer in the males 

 than the females, in the former sex about three-quarters the length of 

 the body, x'ather thick at base, but distinctly tapering to apex ; thoi'ax 

 broader than long, strongly rounded at the sides, with the disc more or 

 less uneven, and with or without a central furrow, narrowly margined 

 on the basal border ; elytra long, a little broader at base than the thorax, 

 subparallel, slightly narrowed towards the apices, which are rounded 

 externally but have the sutural angles well marked; on each there 

 are more or less distinct traces of raised lines ; prostei-num ending in 

 a shai-p point; legs comparatively short, with the femoi-a compressed 

 and slightly enlarged in the centre, and the tarsi short ; anterior tibiae 

 with only one spur ; the latter character will separate it easily from the 

 Asemides, with which it has been classed by Thomson, Lacordaire, 

 Leconte and Horn and others. Dr. Sharp (Trans. Ent. Soc. 1905, 117) 

 considers the Griocephalince as at present known to consist of four genera 

 only, viz. : Criocephalus, Muls., Ileyasenmm, Kx'aatz (which is scarcely 

 different from Criocephalus), and two new genera added by himself, 

 Cephalocrius and Cephalallus, and he says that " the Griocephalince 

 should come at the beginning of the sub-family Cerambycides, as being 

 one of the most primitive forms of Longicorn Coleoptera. The only other 

 genus that I have found to agree with the Criocephalinai as to the 

 unicalcarate tibia? is the genus Fhilas, which forms an annectant link 

 between Cerambi/cides and Prionides. This character is not to be looked 

 on as primitive. The primitiveness of Criocepjhalus depends not on such 

 points as this, but on the fact that it diHers so little from Ooleoptera 



