COLEOPTERA OF BAJA CALIFORNIA. 233 



Hydrocharis Rickseckeri n. sp. 



Oblong oval, slightly broader behind the middle, form 

 of castus, beneath black, above piceous with olivaceous 

 tinge, margin of thorax and elytra yellow. Antennge, legs 

 and palpi yellow, the trochanters piceous. Head finely 

 punctulate. Thorax finely punctulate with three groups 

 of coarse punctures, one near the front angle, a second 

 oblique line each side of middle in front, a third more nu- 

 merous from the middle of the side obliquely backward. 

 Elytra minutely punctulate with the usual series of coarse 

 punctures. Prosternum not prolonged at apex. Tarsal 

 claws abruptly bent, with a broad lobe at base. Length, 

 .46 inch; 11. 5 mm. 



The yellow lateral border of the thorax is narrow and 

 well defined, that of the elytra broader but not sharply 

 limited. 



One specimen, Harris' Pond, near Santa Rosa, Cal. 

 Ricksecker. 



The species of Hydrocharis, four in number, equally 

 divided between the Atlantic and Pacific regions. They 

 are as follows : 



Prosternum prolonged in point behind the coxEe. 



Maxilli',ry palpi long. castus. 

 Prostern im not prolonged. 



PiceydS with entire border yellow. Rickseckeri. 



Ficeous slightly bronzed. ohtusatus. 



Surface pale glaucous green. glaucus. 



Cercyon rufescens n. sp. 



Oval, convex, form of tristis, rufescent moderately 

 shining. Head and thorax sparsely finely punctate. 

 Thorax without basal marginal line. Elytra without 

 impressed stri« but with rows of moderate punctures not 

 closely placed, the eighth, ninth and tenth rows with 

 the punctures deeper and closer for part of their length ; 

 intervals flat, equal in width, irregularly biseriately punc- 



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