TSOPODS OF NORTH AMERICA. 



615 



Esenada, Lower California; Mesilla Park, New Mexico; Phoenix, 

 Arizonii; Las Vegas, New Mexico; Cabanas, Cnl)a; warm spring-, a 

 few miles west of Socorro, New Mexico; Azores; (lalapagos Islands; 

 Alabaster Cave, Eldorado County, California: Alvarez, Mexico, at an 

 altitude of 8,000 feet; Oahu. Hawaiian Islands; Honolulu, Hawaiian 

 Islands; Caracas, Venezuela; world-wide in distribution. 



This species is said to he injurious to various plants in Fort Worth, 

 Texas; found at roots of sugar beets; under stones; in cellars. It has 

 also been foimd dead near poisoned cotton, showing that it feeds on 

 the growing cotton plants. 



Body oblong-ovate, almost twice as long as wide, 8 nun. : 15 nmi. 



Fig. 6t)6.— Porcellio l.kvis ^aft?:r Sars). a. Second antenna, b, Uropod. e. Adult male. 

 d, La.st two segment.s of abdomen amd uropods. e, Seventh leg. /, Flagellu.m. cj, Fie.st 



PLEOPODS OF male. 



Head wider than long, 2 nun. : 8^ mm., with the anterior margin 

 produced in three lobes, the median lobe being triangulate, the lateral 

 lobes rounded and larger than the median lobe. The eyes are small, 

 composite, and situated at the base of the antero-latcral lobes. The 

 tirst pair of antennae are small and inconspicuous, and are composed 

 of two articles. The second pair of antenna^ huve the first article 

 short; the second article is one and a half times longer than the first; 

 the third is as long as the second; the fourth is nt^arly twice as long as 

 the third; the fifth is one and a half times as long as the fourth. The 

 fiagellum iscompo.sed of two ai'ticles, the first of which is a little longer 



