COLEOPTERA OF SOUTHERN CALIFORNIA. 255 



distinctly carinate. Anterior tibiae smooth in front, externally tridentate, 

 above crenate, first tarsal joint shorter than the second; first joint of hind 

 tarsi as long as the next two. 

 Length, 5-5.75 mm. 



Occurs at Pomona and Pasadena, though rarely, dur- 

 ing December and January. 



The claws are very slender and distinctly longer than 

 in any other species observed. There are slight differ- 

 ences in the length and stoutness of the spurs of the 

 front tibia? in the five examples from which the descrip- 

 tion is drawn, but it is not certain that these differences 

 are sexual in nature. A. ungulatus must be placed next 

 to A. served, from which it may be easily distinguished 

 by the unspotted elytra, shorter first joint of hind tarsi, 

 and longer claws. 



72. Amphicoma cooperi Horn. 



This cannot be placed as a synonym of A. ursina, as 

 is announced by Horn in his review of the species of 

 this genus.* A. ursina differs from all our remaining 

 species of the genus in the eyes, which are more widely 

 separated on the vertex than the width of the front 

 between the antennae, and in the hind tibiae, which 

 have but a single spur, characters which are quite 

 independent of sex, and which appear to have escaped 

 previous observation. A. cooperi is in accord with the 

 other species in these particulars, and if it is to be placed 

 with either of the described species it must be with A. 

 canina. It seems best for the present, or until a careful 

 study can be made with ample material, to hold the 

 species as distinct, separating it from A. canina by its 

 smaller size and non-maculate elytra. 



* Trans. Am. Ent. Soc., Vol. X, 1882, p. 119. 



