\0RT1I AMERICAN COLKOPTERA. 73 



tliorax iiiueli longer than broad, sides nearly straight, and slightly converging 

 posteriorh'. Last two joints of antennae anchvlosed. Length 2.4 — .S.O mm. 



N. Y., Fla., Ga. Plate IV, Fig-. 5. 



May be distinguished by its generally large size and shining surface, as 

 well by its light color. 



The prothorax of this species is usually slightly elongated ; specimens, 

 however, are often seen in which it is almost exactly quadrate ; to con- 

 sider it, therefore, as generally sub-quadrate, as has been done in the 

 table, would seem to be as good a course out of the dilemma as is avail- 

 able, when we take the structure of this part as the basis of classification. 

 I am unable to state whether this variability of thoracic form is due to 

 sex or to accidental circumstances. 



fi. S. gilse n. sp. — Form moderately robust, depressed; sides parallel; pu- 

 bescence very short, recumbent, setiform and arranged in very closely approxi- 

 mate rows upon the elytra. Head sub-quadrate; sides nearly parallel behind, 

 rapidly convergent before the bases of the antennae ; surface nearly Hat and finely 

 rugulose ; eyes very small ; genae acute. Antennae somewhat shorter than head 

 and prothorax together; first three joints equal in length; first slightly more 

 robust; sixth and eighth smallest, equal in thickness, and much smaller than the 

 seventh; joints of club but slightly thicker than the first, equal in width, last 

 joint nearly globular. Prothorax somewhat longer than wide; nearly flat in the 

 middle, inclined at the sides, wider than head anteriorly; sides notably bisin- 

 uate, portion between the sinuations strongly arcuate, and minutely granulate; 

 anterior teeth .strongly developed, posterior much smaller and distinct ; posterior 

 margin in the form of a very broad triangle; surface finely and transversely rugu- 

 lose. Elytra equal in width to prothorax, togther evenly rounded behind, some- 

 what more than twice as long as wide, and two and one-half times as long as the 

 pronotum ; sides parallel and very slightly arcuate; borders very narrow and dis- 

 tinct, not becoming narrower posteriorly; surface more convex posteriorly; mi- 

 nutely, and somewhat obscurely punctato-striate; scutellum excessively short and 

 transverse. Legs very short, femora robust, tibiae curvate; first two joints of tarsi 

 robust, remainder slender, last joint much elongated. Color througiiout rufo-tes- 

 taceous. Length 2.9 — .''>.5 mm. 



Arizona (Morrison). 



Received too late for figuring. The species seems. hi)wevor. td be very 

 distinct. 



'J'he species considered thus far arc (piite elongated: tlic tluvc fulidW- 

 ing are much shorter, although nearly of the same width. 



7. S. a«l vena (Walt 1.) — Rather light brownish castaneous, convex : protho- 

 rax quadrate, broader than long ; sides arcuate ; anterior angles with minute blunt 

 teeth, which are followed immediately by slight emarginations. Surface lightly 

 punctured, and sparingly pubescent; pubescence ratlier long. Length 1.9 mm. 



Cosmopolitan. Plate IV, Fig. fi. 



This species is so comnmn as to require no further comment. 



THANS. AMKI!. KNT. SOP. XI. {\H) KKniUAliV. 18S4. 



