KEY TO FAMILIES OP CLAVICOENIA. 245 



kk. Hind coxiE separated. 



/. First ventral segment elongated ; form elongate, slender ; 

 antenna 1 ehib two-jointed. 



Subfamily (XLIV). Lyctina', p. s!.)l. 

 II. All the ventral segments subequal, 

 TO. Middle coxal cavities not closed on the outer side by the 

 meeting of the meso- and metasterna; form very de- 

 pressed ; antennae sometimes clubbed but more often 

 with the outer joints scarcely thickened. 



Family XXI. Cxicujid^, p. ."iiill. 

 tnm. Jliddle coxal cavities closed by the sterna; prosternum 

 prolonged, meeting the mesosternum. 

 n. Front coxal cavities open behind; antennae with their 

 terminal joints distinctly enlarged ; surface pubes- 

 cent and densely punctate; form oval or elongate- 

 oval ; length less than 4 mm. 



Family XXII. Ceyptophagid^, p. 569. 

 'fill. Front coxal cavities closed behind; all the tarsi dis- 

 tinctly five-jointed. 



Grdup (XVIII). Daciies, p. ."144. 

 jj. Hind coxal plates grooved to receive the thighs; prosternum 

 prolonged behind and fitting into a notch of mesosternum ; 

 antenuEe with a three-jointed club ; length less than 5 mm. 



Geuus (XXXVIII). Throscus, p. 775. 

 a. Front coxte transverse. 



o. Hind coxae flat, not grooved. 

 p. Antennae straight. 



(/. Tarsi more or less dilated, first joint not short, the fourtli 

 smaller than any of the others; antennaj with a three- 

 jointed club ; elytra usually shorter tlian the abdomen, 

 the latter with five segments visible beneath ; color rare- 

 ly wholly black. FamilyXX^'I. XrrinrLiD.-E, p. CliS. 

 (jr/. Tarsi slender, the first joint short. 



r. All the tarsi with five joints, the first or basal joint very 

 short; form elongate, usually depressed; length fi or 

 more mm. 



Family XXVIII. Tkooositiixis, p. (i(U. 



;■;•. All the tarsi with joints 1 to 4 short ; hind tarsi with 



but four joints; form convex; length less than 3 mm. 



Family (XLVIII). SpiiiNUin.^i:, p. 901. 



/)/). Antenna' elbowed and with a short compact club; tibiae 



usually all dilated; elytra usually truncate and shorter 



than abdomen ; form short, compact ; black, rarely bi- 



colored. Family XXV. Histerid^, p. 598. 



00. Hind coxae grooved to receive the thighs in repose; body 



rounded or oval, convex ; legs retractile. 



Family XXXI. Byrehid^, p. G71. 

 na. Ventral segments 1 to 3 firmly united (not movable), the others free 

 and movable; all the tarsi five-jointed. 



