Horn.] OLO [Juno 20, 



sparsely punctulate, without supra-orbital stria. Thorax sparsely and 

 finely punctulate, punctures toward the sides denser and at the margin 

 finer and more sparse, basal margin with very coarse punctures. Elytra 

 with first dorsal stria extending three-fourths, 2-3-4 subequal and ex- 

 tending slightly beyond the middle, striae punctured and terminating in 

 punctures ; fourth dorsal arching and joining the sutural which is very 

 nearly entire, oblique humeral finely impressed, external subhumeral 

 confounded with the marginal, internal entirely absent, surface moder- 

 ately coarsely punctured at the apical third punctures extending slightly 

 in front of the tips of the stria; and along the suture slightly in front of 

 middle and becoming gradually more sparse. Pygidium and propygidium 

 coarsely but not densely punctured, and on the former gradually finer 

 and less dense toward the apex. Anterior tibia; finely serrulate, middle 

 and hind tibia? spinulose. Presternum moderately elevated, striae 

 slightly convergent toward the tip, but not attaining the tip nor united. 

 Length .14-.1G inch ; 3.5-4 mm. 



This species resembles 8. Beltrensii of Group II., in all its superficial 

 characters, but the latter has the prosternal striae united near the middle 

 of the presternum. From the characters given in the synoptic table it 

 will be seen that all the species of this group are very closely allied. 



The specimens before me are the types collected at San Diego, Cali- 

 fornia. 



S. obscurus, Lee. Ann. Lye. V., p. 166. 



Thorax sparsely punctured, punctures gradually coarser and more 

 dense to the extreme margin, along the basal margin still coarser and in 

 front of scutellum a slight impression. Elytra with first stria extending 

 three-fourths the length of the elytra, second and third equal extending 

 two-thirds, fourth shorter and arching at base and joining the sutural 

 which extends nearly to the tip ; oblique humeral finely impressed, in- 

 ternal subhumeral long, not joining the humeral, external subhumeral 

 short, visible under the humeral protuberance and joining the marginal 

 at its basal end ; surface sparsely, but not coarsely punctured at apical 

 third, punctures gradually becoming finer and rapidly more distant and 

 scatter over the entire surface. Propygidium and pygidium rather finely 

 and moderately densely punctured, punctures evenly disposed over the 

 entire surface. Anterior tibite finely serrulate, middle and hind tibiae 

 spinulose. Presternum moderately convex, sparsely punctulate, striae 

 exactly parallel, horizontal, and extending three-fourths to apex. Length 

 .16 inch ; 4 mm. 



The disc of the thorax is much more distinctly punctured than any 

 species of this group. 



Occurs at San Diego, California. 



S. Ploridse, n. sp. 



Broadly oval, piceous black, shining, legs and antennas reddish-brown, 

 club darker. Head sparsely punctured. Thorax nearly smooth at middle, 

 sparsely punctured toward the sides and apex, base with coarse punc- 



