TRIP. 1C XVIII. BARIN'I. 347 



The larva 1 live for Hie most part in the stems or roots of plants 

 and are sometimes very injurious to cultivated forms. They usn- 

 allv pupate in the burrows which they have formed, constructing 

 the cocoon of the remnants of the plant fibre. There remains 

 much to be learned of the habits and food plants of these inter- 

 esting insects, easy to separate as a tribe from oilier Rhyncho- 

 phora, but exceedingly difficult to separate into species, unless 

 food plant information can be accumulated and associated with 

 each. Other than LeConte & Horn's Rhynchophora of America, 

 the papers treating of North American species are by 



LcContc, J. L. "Analytical Table of the Species of Baridius 

 inhabiting the United Stales," in I'roc. Phil. Acad. Nat. 

 Sri., 1868, 361365. 



Case;/, Tlios. L. "Barini, in Coleopterological Notices, IV," 

 in Ann. N. Y. Acad. Sri., VI, 1892, 400 (584. 



Casey recognized 30 genera, 30 of which are represented in 

 our territory. Two others since proposed by Linell and Pierce 

 also occur with us. For convenience of treatment they are pri- 

 marily divided into two subtribes. 



KEY TO SUBTBIBES OF BABINI. 



o. Pygidium more or less completely exposed in both sexes and generally 

 almost vertical. Subtribe I. BABIDKS, p. 347. 



act. Pygidium oblique or horizontal, entirely concealed in the female, ex- 

 cept in Odontocorynus. sometimes with the mere apex exposed in 

 the male. Subtribe II. CKXTKIM, p. 376. 



Subtribe I. BARIDES. 



In this subtribe the beak is usually shorter and stouter than 

 in the next, and the elytra are more broadly and separately 

 rounded at tips, this resulting in the exposed pygidium. 



KEY TO EASTERN GEXERA OF SUBTRIRE UAKIDES. 



o. Antennal club shorter, oval or conical, more or less pointed, never 

 as long as the preceding six joints united; fifth ventral segment 

 shorter than third and fourth combined, subtruncate; pygidium 

 usually nearly vertical. 

 l>. Tarsal claws free and more or less divergent. 



e. Second joint of funicle short, not twice as long as wide. 

 (1. Front coxse not separated by a distance equalling their own 



width. 



e. Antennal club small, nearly round, subglabrous and polished 

 at base; form oval or oblong-oval, robust; beak never 

 longer than thorax. I. BARIS. 



