﻿2 Journal New York Ent. Soc. [Voi. in 



I would consider these Arachnids as representing an order — 

 Pseudoscorpionida ; tabulating the genera and other groups as 

 follows : 



Cephalothorax with a transverse median suture; abdominal scutre divided; 

 mandibles small, with a stylet, the serrula attached above to the mobile 

 finger; cephalothorax rounded in front; clavate hairs 



^ frequently present (cHELlFERIDA'/j 2 



} No transverse suture; abdominal scut;e entire; no clavate hairs; cephalo- 

 I thorax usually truncate in front; mandibles usually laige; the stylet 



I often lacking, and the serrula usuaUy detached from the 



I mobile finger (oBISIIU.t: I 4 



,- Four eyes; cephalothorax narrowed quite suddenly in front of eyes; no 

 I trochantins to the anterior pairs of legs. . . (gaRYPIN/e) • -Q^ryPUS. 

 -I Two or no eyes; cephalothorax evenly rounded in front; trochantins to 

 (^ anterior legs (cheliFERIN^e) 3 



Femur of palpus not pedicellate, gradually and slightly enlarged from base 

 to tip; palpi very long and slender; two distinct eyes (except 



cave-form) Chelifer. 



Femur of palpus distinctly pedicellate, suddenly enlarged near base; palpi 



short and stout; eyes usually wanting ChelanopS. 



r Mandibles with a stylet; mandibles small, cephalothorax rounded in front; 



I the serrula attached above (OLPIIN,^'.) 5 



'^ "l Stylet often absent; mandibles large, serrula detached above; cephalothorax 



' truncate in front (OBISIIN.K ) 6 



^ Four distinct eyes Olpium. 



( Two or no eyes Atemnus. 



. i Mandibles with a stylet (iDEOBlSINl) 7 



( No stylet present S 



\ Four eyes Ideobisium. 



' Two eyes Ideoroncus. 



g ( Tibia of palpus chalice-like (CHTHONINl) lo 



I Tibia normal ( OBISlNl) ij 



SFour eyes; (except cave forms); palp; short and stout Obisium. 

 No eyes; palpi very long and slender Blothrus. 



< Four eyes; (except cave forms); palpi long Cllthonius. 



( Two eyes; palpi shorter Lechytia. 



Family CHELIFERID.^. 



Sub-family cheliferin.e. 



Chelifer Geoff. Our species may be separated by the following key : 



I No eyes, cave form, tibia swollen on the inner side mirabilis. 



I Two distinct eyes 2 



( Tibia a little convex on inner side, fingers a lillle shorter ilian 



2 -, hand, western species scabrisculus. 



f Tibia not convex on inner side, fingers as long as hand 3 



