JOURNAL. OF ENTOMOLOGY AND ZOOLOGY 153 



Descripiiou: Lengtli — 3.8-5 mm. Color — ''Dirty," obscure 

 ]mr])le al)ove, shading down laterally to a lighter tint, and 

 showing brownish jmrple beneath. The antennae are dark 

 ])nr})le thronghont ; the legs rather a weak pnrple. The dentes 

 and sometimes the legs as well, show a tendency to a yellow 

 green tint. The head is dark throughout. Antemife — Longer 

 than the head; IV much more slender than III, I short and 

 stoiii ; TI, III and IV snbequal. Ocelli — Sixteen. Claws — • 

 Sni)erior, long, cnrving Imt slightly, armed. One onter and 

 two inner teeth; inferior, short, armed with one inner tooth; 

 no tenent hairs. Fnrcula — Dentes more than twice the length 

 of the mannbrinm ; mucrones provided with fonr teeth, apical 

 one is very small and at the base of the second, the other three 

 are large, blunt; second tooth falcate, third and fourth sub- 

 falcate and nearly opi)osite each other. Clothing of dense 

 short hairs with longer ones on the posterior end of the 

 abdomen. 



Habitat: Found with Isotoma viridis at Camp Baldy among 

 leaves near the stream, and also in Palmer's and Bear canyons 

 and at Laguna Beach, although not abundantly. Guthrie states 

 that he did not find the species very abundant in Minnesota and 

 took them from under the loose bark of a log on the bank of 

 the Minnesota River and also at Lake Vermillion. 



Isotoma palustris Miiller 

 (Plate II, Figs. 8-10) 



Podufa aquatica cinerea De Geer, Act. soc. roy. Ups., 1740. 



Podura palustris Miiller, Zool. Dan. Prodr., p. 184, 1776. 

 Gmelin, LinucTus, Sept. nat. ed. XIII, p. 2911, 1788. Bourlet, 

 Mem. soc. roy. Douai, 1842. Bourlet Mem. sur les Podu- 

 relles, p. 29, iks. 



Aethescerus aquaticus Bourlet, Mem. soc. roy. Douai, 1842. 



Podura psi. Herklots, Xotices EntomologigTies, 1837. 



Isotoma palustris Tullberg, Lver. Podur., p. 45, 1872. Lubbock, 

 Monogr. coll. and thys., p. 169, 1873. Uzel, Thys. Bohemise, 

 p. 62, 1890. Schott, palaearct., coll., p. 63, 1893. Renter, Finl. 

 Coll., p. 26, 1895. Lie Pettersen, Norges Coll., p. 16, 1896. 



