EEVISION OF ELEODTINI BLATSDELL. 357 



Genital characters^ male. — Edeagophore elongately oblong-o\ate, 

 flattened and very feebly arched. 



Basale elongate, oblong; surface moderately convex, sides feebly 

 arcuate. 



AjncaJe rather small, triangular, moderately and rather evenly con- 

 vex above, without groove; sides broadly and moderately sinuate, 

 apex acute and somewhat slender : base subacutely lobed at the middle 

 and sinuate laterally. 



Stermte transversely parabolic in outline. Each lobe triangular; 

 external border quite straight or feebly arcuate in basal two-thirds, 

 thence subtruncate or feebly arcuate to apex, the latter obtuse; in- 

 ternal margin straight and oblique; surface feebly convex, very 

 sparsely punctate and setose, seta? rather short, moderately long about 

 the apical margin. Membrane not setose across the bottom of the 

 sinus, the latter deep and triangular. 



Female. — Genital segment not broadly triangular, less than a half 

 longer than wide, dorsal surface of each valve slightly obliquely de- 

 clivous externall}^ feebly setose. 



ValvuJa (Plate 5, fig. 4). — Dorsal plate elongate oblong, slightly 

 narrowing from base to apex; surface smooth, feebly convex, very 

 sparsely and feebly setose in apical fourth ; external border moder- 

 ately arcuate, scarcely at all expanded ; apical margin not defined 

 from the apex, scarcely wider than the apex at base, angle obsolete; 

 internal border broadly and feebly sinuate. Apex small and more or 

 less membrano-chitinous, feebly setose. 



Appendage small mammilliform with a pencil of quite long setse 

 at tip. Fossa small and at the middle of the external surface of the 

 apex. 



Basal prominences scarcely evident. 



Superior pudendal membrane longitudinally rugulose, and attain- 

 ing the apical fourth of the dorsal plate. 



Ventrolateral surfaces. — Body triangular, surface lines straight 

 when viewed longitudinally, quite evenly convex laterally. Sub- 

 marginal groove small, slightly widened apically beneath the scarcely 

 explanate external border of the dorsal plate. Internal margins of 

 the valves contiguous in basal two-thirds; genital fissure narrowly 

 fusiform in apical third, and the inferior pudendal membrane is not 

 visible. 



Ilahitat. — California (region about San Francisco Bay; San 

 Joaquin and Sacramento vallej^s; hills along the coast in the central 

 part of the State), Farallone Islands. 



Number of specimens studied, 375. 



Type in the Eschscholtz collection? 



Type-loc(dity. — Xear San Francisco. 



