a new subfamily of Scolytide. 441 
It is now necessary to discuss the relationship of these 
insects, which, in antennal development, the structure of 
the fore legs, the presence of the thoracic fovez and pro- 
sternal modification in the male, and the dorsal pore in 
the female, present such remarkable structural features. 
They appear to me to stand midway between the wood- 
boring Tomicini, such as T'rypodendron and Xyleborus, 
and the Platypini. They agree with the latter in pos- 
sessing an exposed head, eyes without emargination 
(they are not so elongate in any Platypid, and are usually 
more convex), the quadrate and laterally emarginate 
prothorax, and the strongly-developed anterior tibie. 
The elytral armature of the males is like that of the 
Platypini (females, Chap.), and the dorsal pore may find 
its homologues in the paired pores of the Platypit disco- 
port (males, Chap.). But though they are apparently 
on the road to Platypus development, they have not 
reached the goal. The antennal funiculus is 6-jointed, 
whereas it is always 4-jointed in the Platypini, the 
flattened scape of which is not like the curved clubbed 
scape of these insects. The tarsi are shorter than in 
any Platypi; the 1st joint, if a little longer than the 
2nd in S. permirus, is certainly not elongate; the hinder 
legs resemble those of a Trypodendron, the mesonotum 
is not carinate, and the metathorax short. Moreover, 
the mouth-parts are not modified to the Platypus type, 
and in the females are not readily distinguishable from 
those of Xyleborus dispar, 2 , differing only in the hair- 
less ligula and the absence of a distinct submentum; the 
malar armature, if Hichhoff’s generalisation is right, 
shows that they are wood-borers. The prothorax differs 
strongly from the cowled and asperate prothorax of the 
Tomicini, without attaining the elongation of that of 
Platypi; the lateral emargination and border are of 
little importance, and indicate merely an arrangement 
for the reception of the large fore legs. This feature 
occurs to some extent in many Scolytide, Coptonotus, 
Camptocerus, Hexacolus, Xyloctonus, &c. An excavation 
for the fore legs which is not bordered is quite common 
in Tomicini, with which the body of these insects agrees 
behind the prothorax. The development of the fore legs 
is anticipated to some extent in J'omicini. The femoral 
lamella is feebly developed in some wood-borers (Amphi- 
cranus, Trypodendron); the scabrous tibig find their 
