REVISION OF ELEODITNT BLAISDELL. 443 



Apex produced and completely chitinized, divergent and feebly 

 decurved or recurved ; dorsal surface convex, directed upwards and 

 inwards; ventral surface concave and directed downwards and out- 

 Avards; externally and cauclad to the apical margin of the dorsal 

 plate, deeply excavated forming a fossa, at margin of which is the 

 minute subpunctiform appoidage^ that scarcely protrudes beyond 

 the margins of its articular cavity, and frequently it bears a couple 

 of short setai at tip. 



Superior pudendal membrane reaches to the middle of the dorsal 

 plates, the latter being contiguous apically, but divergent basally. 

 Internal valvular membrane set w^ith few fine, short setae. 



Ventrolateral surfaces evenly convex, with surface lines straight 

 when viewed longitudinally, rather deeply excavated beneath the 

 apical half of the external margin of the dorsal plate, the excava- 

 tion extending along the ventral surface of the apex. 



Submarginal groove fine, sigmoid tow^ards base. Internal margins 

 of the valves contiguous; genital fissure a narrow^ cleft in apical 

 third, the margins finely setose, setae soft and scattered. Inferior 

 pudendal membrane not visible. 



Habitat . — California (Lake Tahoe, Eldorado County, July, ele- 

 vation 0,280 feet; Big Trees, Calaveras County, August, elevation 

 4,702 feet; Blood's Meadow, Alpine County, July, elevation 7,000 

 feet ; Tuolumne County, D. AV. Coquillet and E. C. Van Dyke ; 

 Colony Mills, Tulare County, elevation 5,415 feet, Charles Fuchs 

 and Ralph Hopping; Fresno, xVlameda, Marin, and Sacramento 

 counties). 



Number of specimens studied, 50. 



Type (female) in the LeConte collection. 



Type-locality. — Sacramento, California ; collector, Mr. J. Wittick. 



Salient type- characters. — Thorax opaque, transverse, sides rounded, 

 densely and confluently scabro-punctate, on each side broadly im- 

 pressed. Elytra densely scabrous with reclinate granules, declivous 

 and acute behind. Anterior femora with an obtuse tooth (LeConte). 



Diagnostic characters. — Scabricula has to be carefully separated 

 from margivata., which it resembles more than any other species, and 

 this can best be done by comparison : It is more roughh' sculptured, 

 usually larger, last joint of the labial palpi triangular, antennae 

 stouter and longer, thorax broader and the legs stouter, there is also 

 less diiference between the sexes. 



The males have the elytra narrower and obliquely declivous pos- 

 teriorly and produced apically; the females have broader elytra, 

 which are more suddenly declivous posteriorly and scarcely produced 

 apically. the anterior femora are feebly armed. 



This species is undoubtedly characteristic of the western foothills 

 of the Sierra Nevada Mountains and where the more typical form is 



