Hum.] ±lJt j- Sep 19i 



Third joint of anterior and middle tarsi feebly dilated 



and spongy pubescent at the sides Group IV. 



Third joint of anterior and middle tarsi not dilated, and 



simply pilose at the sides or entirely glabrous Group V. 



Group III. contains all the species in our fauna with the natural glab- 

 rous coat, iu the other groups (except Group I.) there are species with 

 the accidental coat or entirely glabrous. 



Group I. 

 Anterior tibias with the outer angle prolonged, middle and hind tibiae 

 truncate at tip. Tarsi slender, third joint fimbriate at margin. 

 The following species form this group : 



Thorax without well-defined callosities, surface punctured. 

 Discal striae of elytra not distinctly punctured, intervals 



veiy minutely punctulate simplex. 



Discal striae punctured, intervals very conspicuously 

 punctured. 

 Intervals unequal, alternately uni- and bi-seriately 



punctured vomerinus- 



Intervals equal uniseriately punctured var. huridloides. 



Striae fine, impunctured, interrupted by large shallow 



foveas Ulkei. 



Thorax with distinct elevated smooth spaces, intervals 

 very coarsely punctured or eroded. 

 Strhe with moderately coarse punctures distantly placed inaequalis. 



S. simplex Lee. Proc. Acad., 1859, p. 70. 



Moderately elongate, black, feebly shining. Rostrum three-fourths as 

 long as thorax, filiform, sparsely punctured, at base feebly sulcate, and 

 between the eyes slightly transversely impressed. Thorax oblong, sud- 

 denly constricted at apex, sides feebly arcuate, surface moderately con- 

 vex, sparsely punctured over the entire .rface, punctures coarser be- 

 hind, especially in a very feeble impressk in front of scutellum. Scu- 

 tellum broadly grooved. Elytra slightly narrower behind, sub-opaque, 

 deeply striate, inner six striae impunctured, outeY three coarsely punc- 

 tured except at apical fourth, intervals flat subequal, alternate bi- and 

 uni-seriately finely punctulate. Pygidium moderately coarsely punc- 

 tured, each puncture with a short seta and with a tuft of hairs on each 

 side, tip strongly indexed and smoother. Body beneath sparsely punc- 

 tured. Length .28-.S2 inch ; 7-3 mm. 



Mule. Tibiae fimbriate with long yellowish hairs within, anterior and 

 middle with the inner edge strongly sinuous, hind tibiae strongly sub- 

 angulate. 



Female. Tibiae less fimbriate and feebly sinuous within. The hairs 

 of the tibiae are especially long at the sub-angulation. The sub-apical 

 spur is very small. 



Occurs in California at Tejon and Fort Yuma, 



