42 CALIFORNIA ACADEMY OF SCIENCES. 



Schizogenius S. crenulatus and S. pluripunctatus, 

 Colorado River: seticollis, common in many localities 

 west of the mountains: depressus, generally distributed 

 both east and west of the mountains: litigiosus occurs at 

 San Francisco and north. 



Bembidium. Very numerously represented, more than 

 one-fourth of all our described species occurring in 

 Southern California. B. transversale (of this I believe 

 lugubre to be only a variety), striola, calif ornicum, luci- 

 dum, variegatum, timidum, versicolor and iridescens are 

 widely distributed within our area and are generally 

 common: nitidum has occurred at Riverside, March, and 

 Pomona, May, but is rather rare: erasum occurs in the 

 Sierras from 5, 000 feet upward; the mentum tooth is not 

 bifid in our specimens: longulum, brevistriatum, consan- 

 guineum and acutifrons are also found in the higher 

 mountain canons or valleys between the ranges: carina- 

 tum, banks of Colorado River: bifossulatum , Riverside, 

 June, and near San Diego: insulation, Riverside and 

 Pomona, June; one example on ocean beach at Santa 

 Barbara, August; both these species prefer the muddy 

 banks of reservoirs or ponds in the low country, rarely 

 or never occurring along the small streams of the moun- 

 tain canons or foot-hills: recticolle, Pasadena, Pomona; 

 March to October; not rare along mountain streams at no 

 great elevation: platynoides, in same situations as the 

 last, but less frequent: nubiculosum and intermedium 

 occur wherever there is water in the desert regions of 

 the southeast, the former being exceedingly abundant: 

 indistinctum, found only in the immediate vicinity of 

 the coast, where it is everywhere common: ephippiger, 

 Pomona, June; Redondo, April; Long Beach, August; 

 more frequent near the coast on salt flats, but nowhere 



