3^0 Cohoftera of the Beach, [zoe 



met with it, and I only once received a quantity of leaves affected in 

 that way from a vineyard in Fresno, otherwise injured by too pro- 

 fuse irrigation. This happened in the year 1883. My efforts to 

 obtain another supply of infested leaves were not successful, and it is 

 a queer circumstance, that neither before that time nor after, have I 

 heard that the vineyards of Fresno were infested by Phylloxera of 

 the form feeding on roots. I, therefore, consider the occurrence of 

 the gall-lorming Phylloxera in California as an isolated fact. 



The object of this communication is only to lay down a princi- 

 ple derived from biological facts. The successful adaptation of this 

 principle to season and locality must be left to the viticulturist. 



COLEOPTERA AND MOLLUSCA OF THE OCEAN BEACH 



AT SAN FRANCISCO. 



BY GEORGE W. DUNN. 



Probably most of those who visit the Cliff House and vicinity, 

 look upon the expanse of sand as a waste, with no sign of animal 

 life, and only here and there a few low plants, Abronia, Franseria, 

 etc., with some stunted willows in depressions; but notwithstanding 

 its very desolate and unpromising appearance it is rich in insect 

 life, many species hidden in the sand being exposed by pulling away 



brush or debris from the top of a hillock and starting the rolling 

 sand. 



The following is a list of the Coleopterous insects found along the 

 ocean beach and adjacent dunes. The species inhabiting the sand 

 at a greater distance from the sea will be given in a future list: 



CiCiNDELA HiRTicoLLis. On damp sand feeding on any small 

 animals. 



CiClNDELA I2-GUTATA. On damp sand feeding on any small 

 animals. 



ClClNDELA HEMORRHAGICA. On damp sand feeding on any 

 small animals. 



Thinopinus pictus. Under kelp and sticks, feeding on small 

 crustaceans below high water mark. 



Cafius canescens. Under decomposing kelp and animal sub- 

 stance, 



Dyschirius obesus. On damp sand below high water mark. 



