538 COLEOPTERA 



ties closed behind ; the posterior transversal. Tibia compressed, nearly 

 always denticulated externally; tarsi sub-pentamerous, not spongy 

 underneath, filiform, their third joint entire or bilobed, never very 

 broad. The abdomen composed of five segments. 



Group SCOLYTID^. 



Head of variable form, immersed in the prothorax, often covered by 

 it and invisible above. Ligula free, at least in part, and projecting 

 beyond the mentum. Labial and maxillary /^/three-jointed. Labrum 

 indistinct. Prothorax not narrowed or hollowed laterally for the front 

 femora, widely and profoundly hollowed at its antero-inferior margin. 

 Front coxes more or less prominent, not oblique ; the posterior transver- 

 sely oval. The basal joint of the tarsus very much smaller than the 

 following conjointly. The mesothoracic episterna very seldom large. 



Pachycotes. 



Sharp; Ent. Mon. Mag., June, 1877. 



After an examination of the following species, which belongs to the 

 Scolytidce, its exact affinities appear to me so doubtful that I have given 

 it a new generic name. 



The club of the antenna is rather large and but little flattened, 

 covered with hairs, but these do not extend over the whole surface, so 

 that the four joints can be discriminated. Eyes moderately coarsely 

 granulated, very distant on the vertex, transverse, separated from the 

 antennae by a rather deep constriction. Anterior coxa distinctly sepa- 

 rated, middle coxae broadly separated. Ventral segments rather short, 

 the basal one peculiarly prominent, as long as the three following short 

 ones together, these being about equal inter se and separated by very 

 deep sutures. Tibia not stout, moderately broad at the apex, with their 

 outer edge and apex denticulate, their front face rough, their posterior 

 one pubescent (not smooth or excavate) ; tarsi slender, lobes of the 

 third joint but little developed. The insect has the form and appearance 

 of Hylurgus ligniperda, but is rather shorter and thicker, but the granu- 

 lation of the eyes is distinctly coarser, and the peculiar prominence of 

 the basal abdominal segment suggests an early stage of ,SV0/y///.y-dirTeren- 

 tiation, to which genus however its relationship is otherwise quite 

 remote ; I think for the present it may be placed near Hylurgus ligni- 

 fierda. 



954- P. ventralis, Sharp; Ent. Mon. Mag., June, 1877. Fusco- 

 ferrugineus, opacus, crassiusculus, sub-cylindricus, elytris minus elongatis, 

 crenato-striatis, interstitiis rugosis, parte apicali setis parcis erectis fulvis 

 instructa. 



Long., 4^ mm. ; lat, 2 mm. 



Antenna moderately long, basal joint elongate, second very short, 

 four to seven very short and very closely packed, eight to eleven form- 



