24 FAMILY II. ANTHRIBIDJE. 



The presence of the elevated line or ridge near or at the base 

 of thorax is a constant character (Fig. 27), and its modifications 



form one of the surest guides to the position of 

 the genera. The antenna? of the male are 

 sometimes much longer than the body. The 

 larvjp as a rule infest woody fungi, dead twigs, 

 seeds and the steins of plants and have legs or 



Fig. 27. Head and 



thorax of an An- pseudopods in some genera. However, the habits 



thribid, showing 



antebasai line and metamorphoses are but little known. The 



rlt 3. 



(After Bedei.) typical genus is AutTiribus, founded by Geof- 

 frey in 1764, meaning "a flower'' and "to destroy." The family in- 

 cludes SOI) or more species, mostly tropical and Australian in 

 distribution. Some of them resemble the members of the sub- 

 family I,(i in iiinr of the Cerambycidie on account of the great 

 development of the antenna?. The North American species have 

 not recently been monographed. Abroad they have been cata- 

 logued by Bovie and studied by Dr. Karl Jordan, who treated the 

 family in the Biologia. They are treated by 



LeConte, J. L. u Rhynchophora of X. Amer.. Anthribidse," 

 in rroc. Amer. Phil. Soc., XV, 1S7<5, 39140!). 



ScJucffcr, Clitis. "New Anthribidse," in Trans. Amer. Ent. 

 Soc., XXXII, 1906, 267278. 



Only about 60 species of Anthribidre, distributed among 23 

 genera, are known from Xorth America. Of these 37 species, 

 representing 19 genera, occur in our territory, several of these 

 being immigrants from the tropics. Following LeConte and 

 Horn, the genera are grouped in four tribes as follows : 



KEY TO TRIBES OF NORTH AMERICAN AXTHR1BID.E. 



a. Antennae inserted on the sides of the beak. 



6. Transverse ridge of thorax situated in front of the base (Fig. 27) 

 (very near it in Eusphyrus). Tribe I. TROPIDERIXI, p. 25. 



II). Transverse ridge situated at the base, the surface behind it perpen- 

 dicular. Tribe II. AXTIIRIBIXI, p. 32. 

 aa. Antennae inserted on the front of head or base of beak; thoracic ridge 



basal, 

 c. Elytra striate. Tribe III. AR.EOCERIXI, p. 41. 



<(. Elytra not striate. Tribe IV. XEXORCHESTIXI, p. 44. 



