ARTICULATA. 161 



Okdo IL Oethoceki. Antenna? not geniculate, basal articulation not 

 very long, and not received into a groove in the rostrum. 

 Divisions : Tcmaonides^ Ithycerides^ Camerotides^ Antliarhini- 

 des^ Attelabidcs^ Belldes^ Ajjionides, Ramplddes^ Cylades^ 

 Ulocerides^ OxyrhyncMdes. 



SUB-FAM. 2. SpUKII. 



Legio 1. Palpi hidden, very short, antennse geniculate and clavate, 

 tarsi pentamerous. Division : Dryopldhorides. 



Legio 2. Palpi hidden, antennae straight, not properly clavate, tarsi 

 indistinctly pentamerous. Divisions : Oxycorynides^ Bren- 

 ihidcs. 



Legio 3. Palpi exserted and filiform, tarsi distinctly tetramerous. Di- 

 visions : Hhinomacerides^ Anthi'ibides^ Brucliides. 



Schoenherr excludes the ScolytidcB from the lihynchophora^ and Westwood 

 places them at the end of them. They include various genera destructive 

 to forest trees. 



The Longicornia {pi. 81, fgs. 44-60) have the antennas long and 

 tapering, generally as long as the body, and not clavate ; the eyes generally 

 reniform, and the body elongated. The head is sometimes horizontal and 

 sometimes vertical, the front generally impressed, the prothorax varying, 

 being convex or flattened, transverse, globular, cylindrical ; spinoge, 

 nodulous, or smooth ; presenting in Acrocinus a movable spine (umbo) on 

 each side. The feet are generally slender, the tarsi clothed with short hair 

 beneath, and the third articulation cordate. Some of the females have an 

 ovipositor to insert the eggs in the bark of trees. They are graceful in 

 form, and many of them are brilliantly colored. Some run and fly with 

 great facility, whilst others are tardy in their movements. Some are 

 deprived of wings and confined to the ground and low shrubs. Some fre- 

 quent flowers and other forest trees, and the larvae of the latter are often 

 destructive to useful trees. The beautiful American Olytus pictus^ a species 

 marked with yellow lines li^Qjig. 51, is very destructive to locust trees, in 

 the branches of which the larva bores. It also destroys young hickory 

 saplings which have been cut for hooping casks. 



The larva of Oncideres cingulatus lives within the dead branches of 

 hickory, eating the dead wood ; and to supply it with this food, the female 

 deposits the eggs in little perforations which she makes in the bark towards 

 the end of the branches, which she kills, by gnawing a groove entirely 

 round, through the bark and into the wood^ which efiectually accomplishes 

 the object. The dead branch retains its position long after the dead insect 

 has left it. The upright stem is often thus attacked, when a lateral branch 

 shoots forth to supply its place, which may be similarly attacked the next 

 year, and this sometimes hap^Dcns for four or five years in succession,, so 

 that the top of a young hickory tree sometimes presents a curious and mu- 

 tilated appearance. 



There are three families of Longicornia : Prionidce, CeranibycidcB, ajid 



365. 



