306 FAMILY X. PSELAPHID^. 



Breiidvl and Wkkhani.' - 'The Pselaphicla; of North America, 



in Bull. Lab. Nat. Hist. Univ. Iowa, I. 1890. 216-304; II, 



1891, 1-84, pis. VI-XII. 

 Casey. — " Coleopterological Notices, V and VII," in Ann. N. Y. 



Acad. Nat. Sci., VII, 1893, 433-509 ; IX, 1897, 550-630. 

 Casey. — ''Remarks on Some New Pselaphidas, " in Can. Ent., 



XL, 1908, 257-281. 



The family is divided into two subfamilies, and these in turn 

 into tribes and genera. 



KEY TO SUBFAMILIES OF PSELAPHID^. 



a. Antennae 2- jointed (Fig. 4, No. 10, and Fig. 146, 6) ; front coxae con- 

 tiguous, hind ones distant. Subfamily I. Clavigerin^, p. 306. 

 aa. Antenme ll-jointed (Fig. 146, a), rarely 10-jointed. 



Subfamily II. Pselapiiin^, p. 308. 



Subfamily I. CLAVIGERINAE. 



The members of this subfamily have the head narrow; palpi 

 rudimentary, of but one joint; three basal dorsal segments of abdo- 

 men firmly united and deeply excavated, forming a cavity on the 

 sides of which are tufts of hairs ; first and second tarsal joints very 

 short; third long, with a single claw. The species live solitary in 

 ants' nests and the construction and smallness of the mouth is such 

 that their nourishment is supposed to be liquid in form. The ants 

 caress the tufts of hairs on the abdomen of the beetle with their an- 

 tenna^, causing the exudation of a fluid, which they greedily swal- 

 low. Two genera comprise the subfamily, both of which are repre- 

 sented ip the State. 



KEY TO GENERA OF CLAVIGERIN-^E. 



a. Eyes wanting. I. Adranes. 



aa. Eyes present. II. Fustiger. 



I. Adranes Lcc. 1849. (Gr., "imbecile.") 



Of this genus only two species are known. One of these has 

 been takcMi in the State, while th(> other proba.bly occurs. 



key to species of adranes. 



a. Thorax, when viewed from above, conical ; head cylindrical ; length 



1.8 mm. ccEcus. 



aa. Thorax bell-shaped ; head obconical ; length 2.5 mm. 589. lecontei. 



A. emeus Lcc, orange-yellow, elytra with regular rows of short 

 recumbent, stiff hairs, is known from Penns.ylvania, Georgia and Il- 

 linois. 



