CALANDRIDAE. 505 



Legs moderate, varying, tliougli not greatly, aceording to 

 genus; thighs usually stoutly clavate, not toothed; tibite 

 rather short, strongly unguieulato at the outer angle. Tarsi 

 frequently narrow and not brush-like beneath; third joint 

 sometimes bilobed (Rhininte), sometimes broad, patellate, 

 and not emarginate (certain Sphenophori) ; claws divergent, 

 simple. 



There are embraced in this family several very distinct forms 

 wliich agree with Curculionidaj in general characters, but differ iu 

 having the last dorsal segment of the % not articulated directly at 

 the end of tlic last dorsal, but either retractile or concealed under 

 it. While the mouth organs of the Cossonina; are similar to those 

 of ordinary Curculionidae, and submit to modifications similar to 

 those of Ilylobiini for instance, iu the other sub-families there arc 

 .specializations which do not otherwise occur among Ilhyncho- 

 phora. 



With regard to the affinities of the members of this family, it 

 may be said, iu general terms, that the Calandriua; sliow an alli- 

 ance with the Barini ; the llhiuinaj continue the specialization 

 still farther, and have not a direct resemblance to any other tribe. 

 The Cossonina) seem to be a connecting line from Ilylobiini to 

 Scolytidte, to which they approach very closely in Rhyncolus. 



Three sub-families occur in our fauna, the characters of which 

 have been sufficiently indicated above: the following table will 

 enable them to be readily distinguished: — 



Buccal cavity elongate, peduncle of mentum elongate, narrow ; jiygidium 

 exposed. Calandrix.ij. 



Buccal cavity entirely at the a^iex of the Ijcak ; pygidium cover^l. 



Riiinix.t;. 



Buccal cavity normal, peduncle of mentum short, oral organs exposed ; 

 pygidium covered. CossoxcwK. 



Sul)-FuMuly I._CALANDRINyE. 



Our genera indicate three tribes : — 



Side pieces of metathorax very wide, epiraera large. RnYxcnoriioRiM. 



Side pieces of metathorax moderate or narrow ; 



Mesothoracic epimera liroadly truncate externally ; eluh of antenna; 

 wedge-shaped. SruKNoriioRixi. 



Mesothoracic epimera acute externally ; club of antenuffi oval. 



C.VL.-XKKl.NI. 



