Coleopterological Notices, VI. 625 



satisfactory state by LeConte and Horn, the very important and 

 obvious abdominal structure of the Xylophilin;i?, for example, 

 being completel}' overlooked by these usually acute observers. 

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

 lished by LeConte more than forty A'ears ago, and is at present 

 of course very incomplete. 



The sexual characters of the abdomen are in some groups 

 verv pronounced and in others feeble, differing greatly in general 

 character in the various genera and usually varying distinctly in 

 degree from species to species. In the Eur^-geniini the external 

 modifications are conspicuous only in Retocomus, and in that 

 tribe the intromittent organ is of a somewhat simple type 

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

 distinct tarsal modifications, the external characters are feeble, 

 while the intromittent apparatus becomes marvelously complex. 

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

 acters, when differing distincth' 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 Xylophiliufe, results 

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

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

 Anthicini. It is possible that each species ma}^ 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 Anthicidse 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 witli the antepenulti- 

 mate joint lobed beneath, the penuHimate small; tilnal spurs generally 

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



XVLOPHILINiE 



Anthicini. 



This subfamily may be divided into five tribes by the following 

 -characters : — 



