NORTH AMERICAN COLEOPTERA. 95 



S. gtittulatllM Lcc- (tval, sides of thorax and elytra nearly ((iulimious 

 black, each elytron with an anterior oblique spot composed of two, which may 

 be joined or separate ; at posterior third a transverse band not touching the side 

 or suture, apex indetinitely paler. Head and thorax sparsely and very finely 

 punctate, the thorax with fine basal marginal line; prosternum punctate, without 

 marginal line ; metasternum closely punctate at the sides, the mesocoxal line 

 joining the lateral suture one-third from the coxa. Abdomen moderately closely 

 punctate, the metacoxal line curving outwardly not joining the suture, but par- 

 allel with it. Legs piceous. Length .06 — .08 inch. ; 1.5 — 2 mm. PI. I, figs. 13, 14- 



This species varies in the extent of its elytra! markings. The head 

 may be yellow, and also the anterior angles of the thorax. The ab- 

 domen has six distinct segments. 



Hah. — California, Alameda County, and the yicinity of San 



Francisco. 



Group C. 



The metacoxal line in the species of this group passes in an ob- 

 lique curve toward the first suture and then gradually curves forward, 

 but is not complete. The mesocoxal arc curves forward 

 and joins the suture near the front angle of the met- - — <3;;::Ji| 

 episternum. The prosternal elevated lines are usually \ _^/ 

 entire and distinct. The abdomen has but five segments, / 



but in some females a sixth is visible. The species are not numerous, 

 and may be thus separated : 



Elytra yellowish testaceous. 



With numerous small black sjiots neblllosus. 



Without spots Plielpsii. 



Elytra black, with ante-median obliquely oval red spot circumspectiis. 



Elytra black, with large, apical, pale area opacitliiN. 



Elytra entirely black. 



Abdomen more or less yellow, prosternal lines entire aineric*aiiii!«. 



Abdomen black, prosternal lines short caiii*inii$$. 



S. nebiilosas Lee — Oval, outline nearly continuous, about one-fourth 

 longer than wide, moderately convex, above pale rufo-testaceous, the elytra with 

 small, irregularly placed spots, body beneath black. Head sparsely punctate. 

 Thorax .slightly nari-ower in front, very sparsely finely punctate, basal marginal 

 line nearly obsolete. Elytra moderately coarsely, not closely punctate ; proster- 

 num narrowed in front, each side with an elevated line ; metasternum closely 

 punctate at the sides, the mesocoxal line forming a nearly complete arc. Abdo- 

 men sparsely punctate, the metacoxal line arched, distant from the first suture, 

 incomplete externally. Legs testaceous, femora sometimes darker. Length .07 — 

 .09 inch. ; 2—2.25 ram. 



In the males the fifth ventral is broadly, but slightly emarginate ; 

 in the females a sixth segment is very distinctly visible. 



In some specimens the disc of the thorax is clouded with piceous. 



i/(< 6. —California, Alameda Count)' and Colorado River. 



TRANS. AM. ENT. SOC. XXII. APRIL. 1895. 



