KEY TO FAMILIES OF OLAVICORNI A. 



245 



kk. Hind coxae separated. 



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

 antenna 1 club two-jointed. 



Subfamily (XLTV). Lyctince, p. 891. 

 U. All the ventral segments subequal. 

 m. 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. Cucujid^;, p. 560. 

 mm. Middle coxal cavities closed by the sterna ; presternum 

 prolonged, meeting the mesosternum. 

 hi Front coxal cavities open behind ; antennas 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. 

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

 tinctly five- jointed. 



Group (XVIII). Dacnes. p. 544. 

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

 prolonged behind and fitting into a notch of mesosternum ; 

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



Genus (XXXVIII). Throscus, p. 775. 



ii. Front coxte transverse. 



o. Hind coxae flat, not grooved. 

 /). Antennae straight. 



q. Tarsi more or less dilated, first joint not short, the fourth 

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

 jointed club ; elytra usually shorter than the abdomen, 

 the latter with five segments visible beneath ; color rare- 

 ly wholly black. FamilyXXVI. Xitidllid.e. p. 628. 

 qq. Tarsi slender, the first joint short. 



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

 short; form elongate, usually depressed; length 5 or 

 more mm. 



Family XXVIII. Trogositid^. p. 661. 

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

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



Family (XLVIII). Sphindid.e, p. 901. 

 pp. Antennae elbowed and with a short compact club; tibias 

 usually all dilated; elytra usually truncate and shorter 

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

 colored. Family XXV. Histeriuje, p. 59S. 



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

 rounded or oval, convex ; legs retractile. 



Family XXXI. Byrrtiid.e, p. 671. 

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

 and movable; all the tarsi five-jointed. 



