70 



THOS. i,. CASF.V. 



.MtMitimi smiill. .slitilitly niiiinlol in front, usiiiilly transverse, and very 



slwiri. 



liiiiiila corneous or eoriaceous. of V!iriiit)le form, proininont. Palpi short 

 tlireo-jointed. Maxillae hilolied ; iialpi ratlier short, foiir-jointed, 



Antennae eleven-jointed, insi-rted on. or slii;htly under, the lateral an- 

 terior ani:lesof ilie head, tilil'orin or terminated \>\ a slight elnli.the tir.st 

 joint usually elongated, sometimes to a ureat deufee. 



I'lves usually small, though in .1 few instances very larii'e. 

 Head iai'iic, usually joined closely to the jirothorax, hut. sometime.s, 

 in ('iiciijiis. connected thereto hy a v(!rv distiiict nock. 



as 



I 'roth 



d 



er piece not separated. Pronotuin 

 j^cnerally not contiguous with hase of elytra, and fre(|uently havini;- two 

 lateral loii>;itudinal lines, which are tlu; lines of intersection of the lateral 

 and superior surfaces. 



Anterior coxal cavities in some suh-families clo.sed. in others open he- 

 hind, separated hy the prostcriuini. 



.Mesosti'rniim moderate, sometimes the portion lietween the middle 

 coxae is (piite hroad. and suh-(|uadrato. The e))imcra reach the coxae. 



Metasternum lari;i' and ipiadrati'. episterna lonu', narrow and covered. 



Klytra more or less rounded hehind; flat, Hoinetiines stronuly marjiined, 

 hut in otlu'rs not at <dl so. coveriim the eiuire ahdomeii except in a few 

 eases. Scutelliim small. 



Alidonu'ii witli live free ventral segments. 



Anterior coxae variahle in size and sometimes closely ajtproximate — 

 lliitiiprphis — ulohular or suh-eoiiical. Middle coxae not prominent, suh- 

 triaiiiiular. I'osterior coxai- transverse, nearly conti<:-uous 



JiC^s rather short, femora lariic tihiae slender, terminated hy two 

 s|iurs. 'i'arsi very variahle. soiucliiues heteromeroiis in the males, and 

 pcniamerous in the females. iis\ially with the first joint small, and pen- 

 tamerous in hoth sexes. 



The family is comp(tsed of a comparatively iarii(' luimtier of genera, 

 which, as may he seen from the ahove analysis, are very heteroiicneous 

 in niauv respects, hut which jirescrve in common, except in Sifnnnts. a 

 certain licneral fucits. The species are irenerally flat and eioiij>ated ; 

 sometimes excessively so. and of a somhre tint. They are found L;(>n<>rally 

 under hark, and are usually moderate in tluiir movements, idthou^h 

 Trlt'ithdiiiiH rrto.r runs with the most remarkahle swiftness. 



Kin|)loyin,u the tahle in the ahove meiuioned work, we have the fol- 

 lowinu- live suh-families : 



