REVISION OF ELEODIINI BLAISDELL. 439 



Genital fissure closed and very narrow, finely setose within. In- 

 ferior pudendal membrane not visible when the valves are in adduc- 

 tion. 



Ilahitat. — California (San Francisco all the year around; Alameda 

 County; Trinity County, Dr. E. C. Van Dyke). 



Number of specimens studied, 60. 



Type probably in the Eschscholtz collection. 



Type -locality. — -Near San Francisco, California, 



Salient type-characters. — Thorax subopaque, slightly transverse, 

 sides rounded, surface densely and more or less confluently punctate, 

 scabrous and feebly impressed laterally along the margins. P^lytra 

 densely subscabrous with reclinate muricate granules, declivous and 

 rather strongly acute behind. Anterior femora armed in the male; 

 mutic in the female. 



Diagnostic characters. — Although usually smaller than scahricula, 

 it is at times quite difficult to differentiate ; this is best done by direct 

 comparison : It is less strongly sculptured, thorax not so broad, 

 antennae more slender, shorter, decidedly so in the female, last joint 

 of the labial palpi is narrower and less triangular, legs are more 

 slender. The males have the elytra narrow^er, more obliquely de- 

 clivous and acute at apex, and the profemora armed with an acute 

 tooth. 



The female has the elytra less broad, less suddenly, more obliquely 

 declivous posteriorly and more produced. The profemora are mutic. 



The female genital characters will always decide the diagnosis. 

 In the male the femoral teeth are more acute in marginata than in 

 scahricula. I believe that the genital characters are quite constant, 

 for in the large series examined no mesotypical characters w^ere 

 observed. 



Marginata is rather abundant when its habits are known. About 

 San Francisco it is found around the roots of prostrate shrubs. 



Mannerheim's flscheH was considered by LeConte as a large and 

 well-developed form of marginata. The inaccessibility of the type 

 precludes any efforts to determine its true relations. It might be a 

 scahrieula; if so Mannerheim's name would have priority over that 

 of LeConte's. 



General ohservations. — The mentum (Plate 6, fig. 20) has the 

 middle lobe large and somewhat variable. Usually quite evenly 

 rounded anteriorly, sometimes subtruncate, and again the sides may 

 be somewhat straight ; surface feebly convex and at times more or 

 less foveate laterally. Lateral lobes rudimentary. 



The anterior margin of the prosternum is more or less strongly 

 deflexed. The prosternum and mesosternum the same as in scahrirnla. 



The metasternum laterally between the coxa> is short, and equal in 

 length to the width of a mesotibia at middle. 



