230 CALIFORNIA ACADEMY OF SCIENCES. 



wider than long, and the mentum with a small, deep 

 impression near the hind margin. 



36. Eustilbus notabilis, sp. nov. 



Oval, moderately convex, very slightly attenuate behind; head and 

 thorax black, the latter a little paler at the side margin, elytra rufous, 

 under surface, legs and antennae rufous or rufotestaceous. Upper surface 

 polished and impunctate throughout, the usual lines of punctures on the 

 elytra being scarcely visible. The surface of the elytra is very finely, 

 trauiiversely strigulose, more noticeably so toward the apex, where the 

 surface lustre is slightly dulled. The sutural stria obsolete at about the 

 basal third; eighth antennal joint slightly transverse; free edge of pro- 

 steruai process bearing four or five setfe, which are as long as the width of 

 the process; first joint of hind tarsi rather more than half the length of 

 the second; spurs of hind tibiae a little unequal, distinctly longer than 

 the terminal fringe of spinules, but shorter than the basal joint of the 

 tarsus. There are no sexual differences observable in the seven examples 

 studied. 



Length, 1-1.3 mm. 



Specimens taken at Pomona. 



This is a minute species, easily distinguishable by its 

 color from any other in our fauna. 



37. Exochomus histrio, sp. nov. 



Moderately convex, shining, surface sparsely, very finely punctulate, 

 and finely, feebly reticulate; black throughovit except a short parallel 

 humeral stripe and a subapical spot on each elytron, pale. Claws simple. 



Length, 2.3-3 mm. 



Four examples collected near Pomona, with which 

 are associated for the present two entirely black speci- 

 mens from Santa Barbara. 



E. histrio is an exact counterpart of Casey's E. cali- 

 fornicus, but the size is smaller (the series of eight 

 specimens of the latter species in the writer's collection 

 ranges from 3 to 4 mm. in length), and the claws are 

 not toothed at base. 



The fact that in some of our species of Exochomus the 

 claws are toothed at base while in others they are quite 



