SYSSITOS. 543 
extend to the apex; the suture, however, is thicker and more elevated at the apex, 
and the surface near it somewhat depressed. ‘Tarsi moderately long. 
The two examples received of this species are somewhat mutilated as to the front 
legs, but I think there is a somewhat curvate tibial spur, closely pressed to the first 
tarsal joint and about as long as this. 
3. Syssitos addendus, sp. n. (Tab. XVI. fig. 4.) 
Testaceo-ferrugineus, linearis ; antennis piceis, sat crassis ; capite anterius deflexo, medio canaliculato, utrinque 
minus argute sulcato ; elytris striatis. 
Long. 4 millim. 
Hab. Guatemata, San Gerénimo (Champion). 
Antenne a little thickened towards the extremity, the joints bead-like, but 8-10 
transverse; terminal joint compressed, with broadly rounded apex. Head moderately 
long, convex above, so as to be greatly deflexed in front, finely punctate, the surface 
of the deflexed tubercles finely scabrous. Thorax long, a little narrowed behind, hind 
angles extremely minute but nevertheless prominent, the punctuation rather fine and 
scanty. Hlytra with five fine striz, the outer one of which is reduced to disconnected 
punctures. 
” We have received only one example of this species ; it probably comes nearer than our 
other two to the N.-American Scalidia linearis. From 8. rostratus and 8. longiceps it 
is readily distinguished by the deflexed front of the head, and by the mandibles not 
being at all porrect, but deflexed. 
Subfam. PROSTOMIN A. 
Tarsi 4-articulati, filiformes. Acetabula antica occlusa. 
The genus Prostomis occupies a very isolated position, as remarked by Erichson, 
who nevertheless placed it in the Passandrine. This course has been followed by 
Leconte and Horn and others, although they assign as a chief character of the 
Passandrine that the anterior acetabula are open, and although they are closed in 
Prostomis. Erichson gives, in his definition of Prostomis, “tarsi articulo primo 
minimo.” This he did under the impression that the tarsi should be five-jointed in 
the Cucujide (with an exception as to the hind feet of the males in some genera). I 
cannot, however, after an examination of several species of Prostomis, convince myself 
that a minute basal joint really exists *. Whether this may prove to be the case or not 
is, however, of little importance to us here, as it is quite clear that Prostomis must, in 
any case, be removed from Passandrine, its mouth-characters and prosternal structure 
being so profoundly different from those of the group in question. 
* In saying this I am only confirming an opinion already positively expressed by Du Val and others. 
