244 SEKIKS II. — CI.AVICOKNIA. 



iiiciilnry poi'liosis i-cuiaiii, otlior families of scaveiiyci's succeed, 

 iiainely. the skin-beetles, L)ermestida\ and the bone-beetles, Necrobii 

 and Nitidnhv\ which adhere to llie dfied carcass as h)ng as any 

 vestige of animal matter remains." 



The following families of this snbseries are represented in In- 

 diana : 



KEY TO FAMILIES OF I'ENTAMEIIA CLAVICOKNIA. 



«. Ventral segments all free anfl movable. 

 b. Meutum large, the palpi distant at base. 



c. Eyes present; habits aquatic or snbaquatic: nieiitinn (|undratc, its 

 hind angles not prolonged; antenn;ie short, or less than eleven- 

 .iointed; maxillary palpi as long as or haiger than the antcnnai. 



Family W. IIydkophilid.b, p. 247. 

 cc. Eyes wanting; habits terrestrial; nientnm tran.sverse, its hind an- 

 gles prolonged; antennjB rather long, eleven-jointed, its outer 

 joints but slightly thicker. Family VII. Leptinid.e, ]). 271. 



hi). Mentum moderate or small, the palj)! close together at base. 

 (I. Front coxfe conical. 



c. P'ront cox;Te transversely prolonged at middle, but slightly promi- 

 nent ; thorax (in our species) serrate at margin; abdomen with 

 Hve visible segments, the first not elongated; antennje with the 

 last three joints somewhat but not suddenly enlarged; length 

 less than 3.5 mm. Family XXX. Deuodontid-E, p. G70. 



cc. Front cox.-ie large, prominent, not transversely prolonged at mid- 

 dle. 

 /. Hind coxjc more or less conical and prominent. 

 [/. Eyes finely granulated, sometimes absent; hind coxae usually 

 contiguous; antennae usually with a compact club, but 

 oftentimes nearly filiform (burying and carrion beetles). 



Family VIII. Silphid.e, p. 272. 

 I/!/. Eyes coarsely granulated; hind cox;b separated; length less 

 than o mm. F.-imily IX. Scydm.enid.e, p. 21»1. 



//. Ilind coxjx^ not prominent. 



h. Antennaj long, slender, someti^mes hair-like; elytra shorter 

 than abdomen, the latter thick, conical, and pointed, its 

 last ventral elongate; tarsi long and slender; length less 

 llian ."i mm. Family XIII. ScAPiiiniin.'E, p. 400. 



////. ,\ut('uii;r m(i(l('i-;it(' in length, capitate; hind coxje grooved 

 for tlie receiition of the thighs in repose; body usually 

 scaly or i)ub(>S(ent : elytra entire; length less than 10 nun. 

 Family XXI\'. DEK.MEsm).!-:. ]i. ."S7. 

 (Itl. Front coxa' not conical, not ])rominent. 

 /. Front coxse rounded or oval. 

 ;/. TTind coxa> not grooved to receive the thighs. 

 /,-. Iliiul co\;c configuims; Ixxly very coni])act ;ind conve.x, ely- 

 tra (Mifii'cly covering il : ;iiil(Min;i' witli a llu'ee-jointed cluli; 

 lengili less than ."> iiuii. 



I'amiiy .XH'. I'iiai-acuid.k, ii. 107. 



