NORTH AMERICAN APTERYGOGENEA. 187 



Of this species, already before known from California, 

 I have in my materials about thirty individuals from San 

 Francisco (coll. G. Eisen). 



Achorutes armatus Tullberg. 



Brownish -purple. The extremities are biunguiculate . 

 The denies furcuhv arc thick and twice as long as the mu- 

 croncs, -which have the form of a hook. The anal spines 

 are extretnely long. Length i mm. 



Twenty-four specimens from Berkeley and four speci- 

 mens met with in the neighborhood of Lake Chabot, Cal- 

 ifornia (coll. G. Eisen). 



Gen. Lipura Burmeister. 

 Lipura inermis Tullberg. 



White. The elevations of the postantennal organ are 

 14. The eyelike points on the basis of the antennce are 2. 



Of this species, which I have before had occasion to 

 note down from California, several specimens have been 

 found by Dr. G. Eisen near Lake Chabot. 



I will in this connection observe that Dr. Einar Lonn- 

 berg has found specimens of the above form and of Anu- 

 rida Tullbergi Schott on the shore of a lake near the 

 railway station Clarcona, Orange County, as well as some 

 hundred individuals of Anurida maritima Laboulb. along- 

 the seashore at Key West, Florida. 



THYSANURA Lubbock. 

 Family CAMPODEADE^ Lubbock. 

 Gen. I. Campodea Westwood. 

 Campodea staphylinus Westwood. 



Of this form I have in my materials only one specimen, 

 which, unfortunately, is incomplete. 



Habitat. San Francisco, California. (Coll. G. Eisen.) 



