DEINOPHL@US.—SYSSITOS. 041 
elytra, about as long as broad, straight at the sides, very shining, sparingly punctate, 
the lateral carina very strongly elevated at the base. Scutellum triangular, moderate 
in size. FElytra quite flat on the dorsum; with intra-lateral carina, and three stricz on 
each elytron; the tips are a little prolonged and bisinuately truncate, the sinuation 
being caused by the elevation of the strive into folds so as to leave the surface very 
uneven between them. Hind coxe very widely separated. 
Subfam. ANCISTRIINZ, nov. 
Maxille a genarum processibus adpressis obtectee. Acetabula antica occlusa. Tarsi omnes 5-articulati. 
The genus Ancistria has hitherto been placed by systematists in the subfamily 
Passandrine, the fact that the anterior acetabula are closed behind having escaped 
attention. ‘This important point necessitates the separation from the Passandrine of 
this genus and those allied to it in this particular. 
SYSSITOS. 
Syssitos, Pascoe, MS.? 
? Scalidia, Erichson, Naturg. Ins. Deutschl. iii. p. 305 (1848)'. 
_ The position of this genus is certainly next to Ancistria, and both possess a similar 
structure of the prosternum, the acetabula being also in both closed behind. The 
structure of the head is, however, different in the two genera. In Ancistria the long 
mandibles are curved downwards, the genal processes are prominent, and the antenne 
are inserted in a deep cavity sharply defined posteriorly. 
In Sysst¢os the mandibles are directed less downwards, and the under surface of the 
head is peculiarly deplanate, the genal processes being entirely adpressed, and there is 
no definite, or only an indefinite, cavity of insertion for the antenne. There are other 
differences of considerable systematic importance between the two forms, one of which 
—the retuse elytra of Ancistria—may be specially mentioned, as it supplies a ready 
means of distinguishing the two forms at a glance. 
As regards this genus, I should have been inclined to suppose that it is the one 
referred to by Erichson!, when in a few words he proposed the name Scalidia for two 
S.-American undescribed species; but as the N.-American writers Leconte, Horn, and 
Casey place the Erichsonian genus in a small group of which they give as one of the 
most important characters the open anterior acetabula, this idea must be abandoned, 
unless it can be ascertained that they have been in error as regards the point in 
question. 
The name of the genus Syssitos is due to Pascoe, who has used it in his collection 
for several S.-American species, but I have failed to find any trace of the name in 
entomological literature. 
