424 CALIFORNIA ACADEMY OF SCiENCES. 



Specimens of the last four species are found in which 

 there is shown a faint tendency to a margining of the 

 prosternum. 



Argoporis ebenina n. sp. 



Black, somewhat dull. Head moderately finely and 

 closely punctate, ch^peus truncate. Thorax a little wider 

 than long, narrower at base than apex, sides moderately 

 arcuate, slightly sinuate near the hind angles which are 

 rectangular, disc slightly flattened posteriorly, surface 

 very finely and moderately closely punctate. El^^tra ob- 

 long oval, widest slightly in front of middle, humeri 

 slightly dentiform, disc slightly flattened, substriate with 

 more distinct punctures in the male or with rows of fine 

 punctures in the female, the seventh interval costiform at 

 apex, joining an oblong tubercle on the first. Proster- 

 num finely punctate, propleurae granulate. Mesopleura* 

 cribrate, metapleura? coarsely punctate. Abdomen finely 

 punctate, wrinkled longitudinally. Legs black, finely 

 sparsely punctate. Length, .55-. 63 inch; 14-16 mm. 



Male. — Anterior tibiae serrate within, the inner apical 

 angle prolonged inward. Posterior femora with a long 

 slender tooth one-third from apex. A tuberosity at mid- 

 dle of first ventral segment. 



Female. — Anterior tibiaj ver}^ feebly serrate, the inner 

 apical angle not prolonged. Posterior femora simple. 



This is the largest species in our fauna, differing from 

 all by the velvety black color of surface and legs, and in 

 the male it differs from all but the next species in the 

 presence of but one tooth. 



The elytral sculpture of the male consists of fairly im- 

 pressed striae with moderate punctures not closely placed, 

 intervals slightly convex, very finely sparsely punctulate. 

 In the female there are no stride, simply lines of fine punc- 

 tures, the intervals flat and minutely punctulate. 



Sierra El Chinche, Pescadero and El Taste. 



