108 PSYCHE [December 



EXPLANATION OF PLATE. 



Oribata badia n. sp. X 60. 



" " pseudostigma and pseudostigmatic organ, X 342. 



" lamellar hair, X 342. 

 " alhida n. sp., pseudostigma and pseudostigmatic organ, 



Oribata alhida lamellar hair, X 550. 



" corpuscula n. sp., pseudostigmatic organ, X 342. 



" " right pteromorpha, X 342. 



" maxima n. sp., pseudostigma and pseudostigmatic organ, 



Oribata maxima lamella and lamellar hair, X 97. 



" right pteromorpha and adjacent parts, X 67. 



A LIST OF THE NORTH AMERICAN PSEUDOSCORPIONIDA. 



BY KARL R. COOLIDGE, PALO ALTO, CALIFORNIA. 



The Pseudoscorpions, Uke other arachnida, have been sadly neglected by 

 American entomologists. This can be attributed, in a great measure, to the dearth 

 of systematic literature. The first paper of any importance to appear was Dr. 

 Hagen's "Synopsis Pseudoscorpionidum, synonymica," published by the Boston 

 Society of Natural History (Proc. vol. xiii, pp. 263-272, 1870). Later, Banks pub- 

 lished several papers, including "Notes on North American Chernetidae" ^ and 

 "Notes on the Pseudoscorpionida," ^ the latter superseding. Since then a number 

 of new species have been described and many more will be added when our southern 

 and western faunas are more carefully studied. A number of European papers 

 have also appeared, but these are scarcely accessible to the average student. The 

 habits of the Pseudoscorpions should prove a very interesting field for investigation. 

 Berger (Ohio Nat. vi, 489, 1900) has recorded quite fully the life history of Atemnus 

 elongatus Banks. I hope in the near future to be able to give a full bibliography of 

 this interesting group. 



* Can. Ent. XXIII, p. 160, 1891. 



2 Journ. New York Ent. Soc. V, 3, p. 1, 1895. 



