306 



FAMILY X. PSELAPHIDiE. 



Brendel and Wickham. — "The'PselaphidsB 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 Pselaphidse, " 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 PSELAPHIDyE. 



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

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

 aa. Antennae 11-jointed (Fig. 146, a), rarely 10- jointed. 



Subfamily II. Pselaphin^, p. 308. 



Subfamily I. C L A VIGERI N AE. 



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- 

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

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

 sented in the State. 



KEY TO GENERA OF CIAVIGERIN./E. 



a. Eyes wanting. I. Adkanes. 



aa. Eyes present. II- Fustiger. 



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



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

 been taken in the State, while the other probably 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. coecus Lec, orange-yellow, elytra with regular rows of short 

 recumbent, stiff hairs, is known from Pennsylvania, Georgia and Il- 

 linois. 



