240 CALIFORNIA ACADEMY OF SCIENCES. 



Prosternum and sides of metasternuin closely, not finely, punctate; abdo- 

 men less closely, middle of metasternum sparsely, more finely punctured. 

 Length, 4 mm. 



Described from a single specimen taken at Pasadena 

 by Dr. Fenyes. 



E. confusus is quite different from E. californicus 

 (which is much like E. niger in general facies) because 

 of the more transverse prothorax, which is more 

 rounded on the sides, and the confused elytral punctu- 

 ation. 



In notes taken at the time of making comparison 

 with the type of E. californicus in the Horn Collection, 

 allusion was made to a difference in the form of the 

 basal lobe of the prothorax, but the difference was not 

 then described and cannot now be recalled. 



52. Horistonotus flavidus, sp. nov. 



Pale yellowish testaceous, sparsely fulvo-pubescent, shining; of the 

 same form as H. simplex, but a little smaller and distinctly more slender. 

 Head densely punctulate with numerous coarser punctures intermixed. 

 Antennae feebly serrate, very slightly longer than the head and prothorax. 

 Prothorax subquadrate, hind angles not divergent, sides straight and 

 nearly parallel for three-fourths their length; surface moderately convex, 

 with the usual double punctuation, the coarser punctures rather fine and 

 scarcely smaller posteriorly. Elytra but little wider than the prothorax; 

 sides parallel and very feebly arcuate to apical two-fifths, apex elliptically 

 rounded; striae moderate, rather coarsely punctate at base, more finely 

 toward the apex; intervals rather sparsely, confusedly punctulate. Sides 

 of prothorax beneath coarsely punctate, the punctures separated on an 

 average by little more than their own diameters; metasternum less 

 coarsely, abdomen finely, sparsely punctate, the minute punctures pres- 

 ent over the entire surface. Claws as in H. simplex. 



Length, 6 mm. 



Several specimens were received by Dr. Fenyes from 

 Palm Springs. The specimens were probably taken in 

 June, at electric light. 



This species may follow H. simplex, to which it is 

 most closely related. It differs in its more slender form, 



