466 CLASSIFICATION OF THE RHYNCHOPHOROUS COLEOPTERA. 
front coxæ are widely distant. The side pieces of the metasternum 
are large, and those of mesosternum also large, ascending ob- 
liquely. The hind coxæ are oval, and widely separated, the tibia 
are slender, sinuate, strongly unguiculate at tip, with the articular 
surface lateral; tarsi usually dilated, and brushlike beneath, some- 
times narrow and not scopiferous; last joint rather long, claws 
simple, separate. : one 
RHINIDZ. Be 
Again a different modification of mouth is seen in this sub-family. 
concealed. The mandibles are smooth and very convex on the in- 
ner face, while the outer face is rough and flattened, and the teeth 
project outwards. The beak is long and slender. The antenn® 
are geniculate, the club is smooth and corneous at base, spongy 
and pubescent for the rest of the surface. The eyes are large 
and coarsely granulated, and meet on the under surface of the 
head. The front coxæ are very narrowly separated, the under me 
face of the body, and the dorsal segments are as in Calandride, 
except that the pygidium is covered by the elytra. Tibiæ slender, 
strongly hooked at tip, tarsi narrow, 3d joint bilobed, ciliate at 
the sides, not pubescent: 4th joint long, claws simple, ; 
A small black species of Rhina has been found by Mr. ù. ™ 
Crotch, in the trunks of Yucca in the Mohave Desert of California; 
otherwise the genus occurs generally in tropical America. 
COSSONIDÆ. a 
With the same arrangement of abdominal segments above de 
scribed, these insects have an oral structure similar to that of 
Hylobiini in the true Curculionidæ. The gular peduncle is 
ately long, the mentum distinct, and palpi large. The man 
are normal in form, convex externally, toothed as usual 
The beak is moderate, or (Rhyncolus) short and stout. 
transverse, moderately finely granulated. The antenn® § 
late, rather stout, club oval annulated, pubescent. Front 
separate, tibia hooked at tip, tarsi narrow, 3d join 
Pygidium covered by the elytra, smaller than in the two 
sub-families. 
SCOLYTIDZ. 
The members of this family, which contains some of 
destructive enemies of forest trees, may be easily reco 
