62 CALIFORNIA ACADEMY OF SCIENCES. 



Tychus. — A single example of the tiny species T. 

 tenellus was taken on the wing at Pomona in January: 

 hexagonus, three examples also taken flying, on a warm 

 day in March, in the Ojai Valley; and six examples taken 

 in like manner by Dr. Fenyes at Pasadena in February: 

 puberidnK occurs at San Jose (Le Conte): sononiw, Men- 

 docino County. 



Pselaptrichus. — P. tuberculijxdpus was taken in the 

 neighborhood of San Francisco in some numbers by 

 Mr. Fuchs. 



Scalenarthrus. — S. hornii was found at Needles, on 

 the Colorado River, by Mr. Wickham, and by myself 

 further down the river at Yuma, in July, under vege- 

 table debris accumulating in damp situations along the 

 bank of the stream. 



Decarthron. — D. hi^endeli, Riverside and Pomona, 

 April, in damp places near streams. 



Pselaptus. — P. belfragei is described from Texas, but 

 is said to occur as far west as Yuma (Casey). 



Reichenbachia. — R. deformata and R. htmidicornis are 

 both easily obtained in numbers by sifting along the 

 margins of streams and in moist places nearly every- 

 where: sagax is far rarer, having been taken by myself 

 once at Santa Monica in early spring, and by Dr, 

 Fenyes at Pasadena by sifting, March: the types of 

 falli and turgidicornis were both taken by me under 

 dead fish on the ocean beach at Santa Monica in Feb- 

 ruary, 1892, and no other specimens were obtained until 

 March, 1897, when both species were again found by 

 Dr. Fenyes and myself on the ocean beach at Redondo. 

 It is probable that the occurrence of these species on 

 the ocean front is due to winds or other fortuitous 



