308 



FAMILY X. PSELAPHIDJE. 



Subfamily II. PSELAPH NAE. 



In this subfamily the abdominal segments are all separate and 

 the antennae have 11 (10 in certain species of Bryaxis) joints. 

 Three tribes comprise the subfamily, all of which are represented 

 in the State. 



KEY TO TRIBES OF PSELAPHIX.E. 



a. Antennas approximate at base,, inserted beneath prominent horizontal 

 contiguous tubercles. Tribe I. Pselaphini, p. 308. 



aa. Antennas distant, inserted on the sides of the head beneath short, de- 

 flexed tubercles. 

 6. Hind coxae widely separated, transverse, not prominent. 



Tribe II. Bkachyglctixi. p. 315. 

 66. Hind coxae approximate or contiguous, conical and prominent. 



Tribe III. Euplectixi. p. 328. 



Tribe I. PSELAPHINI. 



Our species of this tribe are always narrowed in front, much 

 broader behind and have the abdomen strongly margined and the 

 hind coxa? widely separated. The following genera are probably 

 represented in the State : 



KEY TO INDIANA GENERA OF PSELAPHIXI. 



a. Tarsi with two equal claws. 



6. Antenna? moniliform or bead-like, without a distinct club. 



c. Maxillary palpi very small, the basal joints hidden, the last two 

 united to form a globular club. Chexxtcm. 

 cc. Maxillary palpi with the last two joints very transverse, fusiform 

 and compressed. III. Ceophyllus. 



7)7;. Antenna? clavate, the last joint usually gradually larger. 



(J. Last three joints of maxillary palpi bearing bristle-like appendages 

 on the sides. 



e. Appendages of last three joints of maxillary palpi short, the 



joints triangular ; abdomen carinate. IV. Tmestphortjs. 



ee. Appendages very long, the last three joints oval-transverse. 



V. PlLOPITJS. 



del. Maxillary palpi without appendages on the sides. 



f. Last two joints of maxillary palpi lunate, or half-moon shaped. 



the terminal one longer. VI. Cedtus. 



ff. Last two joints not lunate. 



g. Last three joints of antenna? forming a club : last joint of max- 

 illary palpi elongate and with a terminal bristle. 



VII. Tyrus. 



gg. Last joint of antenna? very large, rounded : last joint of palpi 

 cylindrical, rounded at tip. VIII. Hamotus. 



