72 CALIFORNIA ACADEMY OF SCIENCES. 



Cryptobium. — This genus is not well represented in 

 California, californicutn being the only species known 

 from west of the mountains; it is not rare, especially in 

 the foot-hills and mountains. C. tumidum is recorded 

 from California, Arizona and Utah, and is doubtless 

 confined to the region east of the mountains. I have 

 taken females of an undetermined species at Yuma. 



Lathrobium. — L. puncticeps, rather rare : jacohinum, 

 very common along any of the streams from the Sierras: 

 californicum, rare, Pomona, May ; Redondo beach, 

 March : lituarium, a few specimens taken at Indio and 

 Yuma : subseriatuvi occurs in the northern part of the 

 State. There are three undescribed species in my col- 

 lection, one from Southern California (Pasadena), and 

 the other two from the north. 



Caloderma. — C. rugosa, C. mobilis and G. reducta are all 

 abundant under vegetable debris near water, occurring 

 sometimes in great numbers in damp places in the 

 mountain canons: continens is recorded from San Diego; 

 it is probably not different from rugosa. Three species 

 not yet determined have been found in the caiions near 

 Pomona. 



The other species described by Casey — angulata, con- 

 tracta, luculenta and tantilla — occur in the middle and 

 northern parts of the State. 



Oligopterus. — 0. cvneicollis, San Francisco. 



Medon. — AI. malacu occurs in the same situations as 

 the species of Caloderma, but specimens are not quite so 

 numerous: latitiscida, " Southern California and Lake 

 County" (Casey). Several unidentified species are from 

 Southern California, while the following are from mid- 

 dle and northern California: sinuaticollis, convergens, 



