114 CALIFORNIA ACADEMY OF SCIENCES. 



tumescens is recorded from Santa Cruz Island: hirtus 

 and carbonatus occur near San Francisco. 



Melanactes M. densus is not common at San Ber- 

 nardino, Riverside, Pomona, etc.; found under bark 

 and in decaying trees and stumps, in April and May. 



Aphricus. A. californicus is occasionally found at 

 Pasadena and Pomona, by sweeping weeds and herbage 

 by roadsides, May to August. According to Horn it 

 has been found from San Diego to Owens Valley. 



Aplastus. A. angusticollis was many years ago taken 

 in numbers at San Diego by Mr. Crotch; it has since 

 been taken sparingly at the same place, in April, by 

 Mr. Dunn: corymbitoides is a rare species which has 

 been found at Riverside and Los Angeles: speratus is 

 rather common at Pomona, where on warm evenings in 

 May and June the males may be taken on the wing or 

 at light; the females are wingless and are very seldom 

 discovered: tenuiformis is described from "Cal.," and is 

 probably from the central region: optatus has been 

 found at Fresno, and in Alameda and Santa Cruz 

 counties: molestus is recorded from near San Francisco. 



Plastocerus. P. schaumii is rather widely diffused 

 and rather common at Pomona, Pasadena, etc., in June, 

 coming often to light; the females are not apterous, but 

 are very rarely taken. 



Euthysanius. E. lautus is found at same places and 

 under same conditions as P. schaumii, but is less fre- 

 quent at Pomona in my experience. Judging from a 

 small collection sent me by a friend, it is not rare in 

 the vicinity of Long Beach. E. pretiosus is certainly 

 rare in our district, though specimens have been seen 

 labeled "So. Cal.;" it is more common in the central 

 valley. 



