CLASSIFICATION OF THE RHYNCHOPHOROUS COLEOPTERA. 461 
Beak short, broad, gular margin not prominent, eyes round. 
SITONINI, 
Beak short, very thick, buccal cavity deep. BaTHYRINI. 
Beak ee long, gular margin fee i AART and me 
tum retracted. ALOPHINI. 
B. Antennal eta nót E S to the ta of the käod ibles 
A. Gular peduncle broad truncate, mandibles BE at tip ADEDE 
not geniculate, claws toothed); . . ¿eo w ITHYCERINL 
B. Gular peduncle long: (Mecorhynchi). 
A careful analysis of the tribes composing the last division 
(Mecorhynchi) would extend this memoir to an unsuitable length 
for my present purpose, and must be reserved for the concluding 
part of my work on classification,* now in preparation. A few 
remarks upon the other four tribes, which might even be regarded 
as subfamilies, will however not be out of place. The types are 
well known with the exception of the second, Bathyrini, founded 
upon a very remarkable species from Arizona and Texas, which 
resembles somewhat a Cratoparis, of the family Anthribide; a 
resemblance increased by the hind angles of the prothorax in g 
being expanded and flattened, so as to be as wide as the base of 
the elytra. The beak is not longer than the head, deeply con- 
stricted at base beneath, then suddenly expanded so as to be as 
broad as long, very thick, strongly channelled and deeply emar- 
ginate above. The antennal grooves are deep, extending to 
the base of the mandibles and flexed below the eyes, which are 
pointed below; the scape of the antennz extends as far as the 
eye; the 1st joint of the funiculus is § as long as the scape; the 
2d is about } as long as the Ist; the 3d-—7th nearly equal in 
length, gradually a little thicker ; club pubescent, oval, — 
as usual. The buccal cavity is very deep, and square. The 
peduncle is not visible, and the mentum small, narrow, and so 
in the cavity ; the mandibles are strong, their base very broad and 
transverse, the tip (so far as I can see) feebly emarginate. The 
prothorax is lobed behind the eyes, and the prosternum deeply, 
almost semicircularly, emarginate in front. The front cox are 
Contiguous ; the side pieces of the metasternum narrow ; the sides 
of the elytra narrowly emarginate behind the humeri, scutellum 
verse, wider behind; the sutures of the ventral segments are 
Straight, and the segments less unequal than usual, the 3d and 4th 
* Classification shes the Coleoptera of N. America. Smithsonian Institution Miscell. 
Publications. 
