662 Pomona College Journal of Entomology 



material indicated iiiterf^radatioii. Mr. Bollnian's californiensis seems to Iiave 

 been based on partly grown specimens of tliis s|)ecies, his description agreeing 

 conipletel\' with such so far as it goes. 



Bod_v as wide or nearly as wide anteriorly as at the middle, but strongly 

 narrowed caudad. Head and prehensorial feet with prostermnn brownish red; 

 antenna? brown, pale distad ; body fulvous, more brownish cephalad; legs yellow. 

 Cephalic lamina longer than wide, narrowed from in front eaudad. I'rebasal 

 plate not evident, the cephalic overlapping the anterior border of the bas/il. 

 Claws of prehensorial feet when closed reaching well beyond the first anteniial 

 article; first joint of prchensor with a tooth at meso-distal angle, the claw at base 

 also with a somewhat smaller tooth. In large specimens the first spiracle is dis- 

 tinctly vertically elli|)tic and nuieh larger than the second, all others circular. 

 The last ventral plate moderate in width, longer than wide, narrowed caudad. 

 Co.\o))leurit with from four or fi\e to thirty-nine or so, the larger numbers occur- 

 ring in individuals not fully grown; some of the pores usually covered by edges 

 of ventral plate, while one, often larger, usually stands apart from the rest on 

 the more caudal surface of the coxopleura. Pairs of legs sixty-seven to eighty- 

 seven. Length up to nearly 70 mm. 



Localities. — San Francisco, Sausalito, Berkeley, Stanford, Pacific Grove, 

 Monterey, Santa Barbara and Los Angeles, collected by the writer. A single 

 specimen is also in the material received from Pomona College (Pillsburv, 

 collector). 



Taiyuna claremontus Chamberlin 



This species is known from but few specimens, mostly from Claremont. It 

 differs from the preceding in having the anal legs armed with a distinct claw. 

 The number of pairs of legs in the type is sixty-five and the length 19 mm. 



Genus Watophilus Chamberlin 



I-abrum with middle piece fully separating the lateral. First article of 

 paljjus and coxa at disto-ectal angles bearing long lappets. Coxk of second 

 maxillae nearly separated mesally; the palpus with femur at meso-dorsal distal 

 angle with a conical process and usually the succeeding article less distinctly 

 produced at disto-ectal angle. Prosternum without chitinous lines. Claws of 

 prehensorial feet extending beyond front margin of head; articles of feet dentate 

 within. Ventral pores absent. Last ventral plate wide. Coxopleural pores 

 small, few. Anal pores present. Anal legs clawless, tlie claw being replaced 

 by a small, membranous, seventh article. There is a tendency for the number of 

 pairs of legs to be fixed for each sex in each species, variations from this mode 

 not being frequent. The two California species known may thus be separated. 



Key to Species 

 a. Pairs of legs forty-one to forty-three; exposed portion of basal plate eight 



times wider than long. Jf. errans sp. nov. 



aa. Pairs of legs forty-seven to fifty-five; exposed portion of basal plate about 



three and one-half times wider than long. W. laetus sp. nov. 



