THE CANADIAN ENTOMOLOGIST, 165 



which are straight and a httle longer than hand ; femur longer than 

 fingers. Mandibles large, not quite as long as cephalothorax. Cephalo- 

 thorax not much wider in front than behind, not near as much so as in 

 Chth. pennsylvanicus ; hind eye about once or one and one-fourth its 

 diameter from front eye, which is a little separated from anterior margin 

 of cephalothorax. Abdomen narrow at base, growing wider near tip,' 

 end rounded, more than twice the length of the cephalothorax. Hind 

 pairs of legs larger than front pairs ; hind legs extending beyond abdomen, 

 but the tip of the tibiffi rarely reach the end of the abdomen. Under 

 leaves in woods, Long Island, N. Y.; Ithaca, N. Y. ; Washington, D. C. 



Ckt/ionius vioestus, nov. sp 



Length, 1.3 mm. Colour, more reddish than preceding, silvery spots 

 not as distinct. Palpi short not reaching end of abdomen ; femur short, 

 cylindrical ; fourth joint conical ; hand very short, fingers straight, about 

 twice the length of hand, about as long as femur. Mandibles large, 

 tapering, not as long as cephalothorax. Cephalothorax quite a little 

 broader in front than behind, more so than in Chth. loiiglpalpis ; eyes 

 close together, about touching. Hind pair of legs short, not reaching 

 beyond abdomen. Ithaca, N. Y., under stones in spring. 



The described species of North American Chthuniiis may be separated 

 by the following table : — 



J Cave species, two or no eyes 2 



(Not cave species, four eyes 3 



f Hind legs about twice as long as the abdomen packardi. 



[Hind legs not much longer than the abdomen coecus. 



(Eyes close together, almost touching moestus. 



\ Eyes distinctly separated 4 



4 



rHind eyes about twice its diameter from front eye, ceph, 



I much wider in front than behind pennsylvaiiiacs 



I Hind eye not twice its diameter from front eye, ceph. but 



little wider in front than behind longlpalpis. . 



Atem?nis, Can. 



The eyes in this genus are indistinct or wanting ; the mandibular 

 apophysis is present, the dorsal scut^e softer than usual, and the fourth 

 joint of the palpi is longer than is usual in the Obisince. A species from 

 California may be called 



Atemnns ca/i/ornicus, nov. sp. 



Length, 2.1 mm. Colour, cephalothorax and palpi reddish-yellow, 

 abdomen and legs nearly white. Cephalothorax longer than broad, sides 



