CUCUJIDAE. 1 33 



Two tribes are indieated by our genera: — 



Antennae with tlio tirst joint usuiilly moderate ; liind tars^i of 'J, 4-jointed. 



("rcL'.riNi. 

 Antennae with the lirst joint always elongated ; hind tarsi of "J, fj-jointed. 



Brontimi. 



Tribe I.— CUCU JIIVI. 



Prostcrnum narrow. 2. 



Prosiernuin wide ; body depressed. 4. 



2. Hind angles of head not prominent. 3. 

 Hind angles of head prominent ; antenna' not thicker towards the tiji. 



Cucujus. 



3. Body depressed; eyes contiguous to prothorax. Pediacus. 

 Body cylindrical ; eyes distant from prothorax. Narthecius. 



4. Eyes distant from prothorax, which is margined. j. 

 Eyes contiguous, or nearly so, to the prothorax ; labrum large, trans- 

 verse, roimded in front. 6. 



5. Elytra very short ; labrum not emarginate. Ino. 

 Elytra long; labrum broad, emarginatt; ; mandibles emarginate at tij) ; 



antennae filiform. Parandrita. 



6. Spurs of front tibiae unequal. Laemophlceiis. 

 Spurs of front tibia? equal. Lathropus. 



In the narrow and less depressed species of Livnioplilreus {L. 

 arn/KsiuIus Loc.) the prothorax is not margined, and tiie eyes are 

 .smaller, less convex, and are somewhat distant from the front 

 edge of the prothorax. The antennal joints are rounded, and the 

 last three distinctly larger. Such species might be well separated 

 as a distinct genus, allied to Caulonomus AVoU. from Madeira, 

 which, liowcver, is remarkable for the truncate elytra, leaving the 

 pygidium exposed. 



Some species of La^niophloeus, undescribed, have the first an- 

 tennal joint of the 1 elongated, curved, and acute at tip, and the 

 eyes distant from the prothorax; these are also more convex, and 

 might properly be separated as allied to Caulonomus. Similar 

 antennal characters, however, occur in certain genuine L^mo- 

 phloeus, with depressed form and eyes nearly contiguous to the 

 prothoriix. 



Ino occurs in Texas, Narthecius in both of the regions. 

 F'arandrita (established on L. cejiJialofes Lee.) in Arizona, and 

 the other genera on both sides of the continent. 



This family is evidently an antiipie and .synthetic type, which 

 exhibits alliances with both Ileteroniei-a and IJIiynchophora more 



