NORTH AMERICAN APTER YGOGENEA. 183 



segment of the caudal appendage, and partly the same 

 coloring. 



Having had at my disposal only one individual, which 

 I have wished to spare from dissection, I cannot give any 

 account of the number and disposition of the eyes. 



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



Gen. V. Templetonia Lubbock. 

 Templetonia quadrioculata n. sp. 



White. The eyes are four, two on each side of the head. 

 The terminal joint of the antenna? is not annulated. Length 



7.3 nun. 



The type of this genus, T. nitida (Temple), is to be 

 recognized by two eyes, one on each side of the head. 

 In our species, however, the eyes are four. They are 

 nearly of the same size and are placed transversely close 

 by each other. The terminal joint of the antenna is not 

 annulated, therefore this characteristic must exit out of 

 the diagnosis of the genus. 



As to the other characteristics, the shape of the claw- 

 joints, of the extremities and of the terminal segment of 

 the caudal appendage, there is a complete coincidence 

 between the two species. The color of alcoholic speci- 

 mens is pure white, as the scales are more or less com- 

 pletely fallen off. 



Habitat. Berkeley, California. (Coll. G. Eisen.) 



Gen. VI. Isotoma (Bourlet). 

 In conformity with the opinion about the systematiza- 

 tion of the genus Isotoma Bourl., which I have introduced 

 in my memoir Zur Systematik und Verbreitung paleearc- 

 tischer Collembola, the variety of T. viridis Bourlet, 

 which I have already before had an opportunity to note 

 from California, ought to change the name aquatilis Lbk., 

 for riparia Nic. 



