COLEOPTERA OF SOUTHERN . CALIFORNIA. 57 



Limnebius. L.piceus, common enough when found, 

 but inclined to be local; I have found it in numbers in 

 the streams of the foot-hills near Pomona and Pasadena; 

 polituSy alutaceus and congener are names given by 

 Casey to forms occurring from San Francisco north; 

 they are, I think, based merely on local or individual 

 and sexual variations of 'piceus. 



Laccobius. L. ellipticus is extremely abundant every- 

 where. 



Philhydrus. P. carinatus and P. nebulosus are com- 

 mon and widely diffused: diffusus, not rare in the Redondo 

 salt lake, also in salt marsh at Santa Barbara: cuspidatus 

 and hamiltoni are recorded from the northern part of the 

 State. Specimens taken by myself at Sacramento are 

 by their color to be referred to hamiltoni ; this differ- 

 ence, however, is of little consequence, and they are 

 structurally not materially different from diffusus of 

 Southern California. P. californicus is from an unre- 

 corded part of the State, "probably northern": conjunctus 

 occurs at Lake Tahoe. 



Helochares. H. normatus is found in most localities, 

 but nowhere very common. 



Cymbiodyta G. punctatostriata, found only in moun- 

 tain streams: dorsalis, common and generally distrib- 

 uted: imbellis occurs from Fort Tejon north, and is not 

 rare in the neighborhood of San Francisco. 



Hydrobius. H. fuscipes, not common, Pomona, Riv- 

 erside, San Bernardino: latus, extreme north: scabrosus, 

 San Francisco and north. 



Creniphilus. C. subcupreus } not very frequent; Po- 

 mona, San Bernardino Mountains, Yuma: elegans* not 

 common, in the salt lake at Redondo: rujiventris, rare at 



* Specimens of this species recently received from Mr. Schwarz were taken by the late Henry G. 

 Hubbard in salt springs at Salton on the Colorado Desert. 



