Coleo}-)terological Notices, VI. 625 



satisfactory state \>y LeConte and Horn, the verj- important and 

 obvious abdominal structure of the Xylophilince, for example, 

 being completely overlooked by these usually acute observers. 

 The last revision of the American species, as a whole, was pub- 

 lished by LeConte more than forty years ago, and is at present 

 of course very incomplete. 



The sexual characters of the abdomen are in some groups 

 very pronounced and in others feeble, differing greatl}' in general 

 character in the various genera and usually varying distinctl}^ in 

 degree from species to species. In the Eurygeniini the external 

 modifications are conspicuous onl}- in Retocomus, and in that 

 tribe the intromittent organ is of a somewhat simple type 

 throughout. In Pedilus (=Corphyra) and Macratria, genera with 

 distinct tarsal modifications, the external characters are feeble, 

 w^hile the intromittent apparatus becomes marvelously complex. 

 These facts tend to prove still further that primary sexual char- 

 acters, when differing distinctly in type, may in certain cases be 

 quite as valuable in defining genera as any other structural modi- 

 fication. 



The well known scarcity of individuals in many parts of the 

 series, as for instance in the Eurygeniini and Xylophilina, results 

 in all probability, chiefly from the fact that we do not know the 

 habits of these insects, which are very different from the epigeal 

 Anthicini. It is possible that each species may appear in abun- 

 dance only at certain very limited seasons or on certain individ- 

 ual trees, as is known to be the case with a number of longicorn 

 groups of suppossed excessive rarity. 



The Anthicidc-e may be divided into two important subfamilies 

 as follows : — 



Abdomen composed of five free segments; tarsus with the penultimate joint 

 lobed beneath; tibial spurs generally distinct; labial palpi minute. 



Anthicini 



Abdomen composed of four free segments, the first formed of two amalgamated 

 somites with the suture sometimes indicated; tarsus with the antepenulti- 

 mate joint lobed beneath, the penultimate small; tibial spurs generally 

 obsolete; labial palpi with the last joint large and more or less dilated. 



XVLOPHILIiSr^ 



Anthicini. 



This subfamily may be divided into five tribes by the following 

 •characters : — 



