REVISION OF ELEODIINI — BLAISDELL. 393 



A synoptical tabulation of the «enita] characters will prove in- 

 structive : 



Males. — ApicaJe equilaterally triangular and depressed, central 

 area of the dorsal surface feebly concave and membrano- 

 cbitinous; apex not in tlie least attenuate 



nig nun. 

 var. perlonga. 

 Ulis.siiHilis. 

 i va r. iicrudensu. 

 Apicale triangular, not depressed, with a definite median longitudinal groove; 



apex attenuate ■ .svhicarzii. 



Females. — Valvular apex chitinous, flattened and moderately fnigrina. 

 produced, tip rounded, convex above and concave beneath ; var. lierlonga. 

 superior pudendal membrane longitudinally rugulose, reach- Idiss/mi/is. 



iug at least to the apical fourth of the dorsal plate vav.nevadetisis. 



Valvular apex apparently chitinous, short, triangular, somewhat detiexed ; 

 sni)erior i)udendal membrane reaching to the apical third of the dorsal plate, 

 and Udt rugulose in the examples studied sclitcarzii. 



ANALYTICAI, KEY TO SPKCIES OF SUBGf:NUS METABLAPYLIS. 



First j<Mat of the anterior tarsi not thickened at ti]) beneath, groove distinct 

 and entire. 



Sculpturing submuricate on the elytral sides and apex. 



Surface luster subopaque nigrina. 



Surface very bright and shining — males frequently very elongate. 



var. iterhiiiga. 

 Sculpturing smooth, not at all suba.sperate. 



Surface luster more or less shining; form fusiform-ovate to ovate; 



ventral surface not distinctly pubescent dissimilis. 



Surface subopaque and alutaceous; both sexes typically of the same 

 form, elojigately cylindrical ; ventral surface with rather long, sparse, 



flying hairs var. nevadensis. 



First joint of the protarsi in both sexes, thickened at tip beneath, groove in- 

 terrupted sehwarzii. 



ELEODES NIGRINA LeConte. 



Eleodcs nigrina, LeConte, Proc. Acad. Nat. Sci. I'hila., is.'ls, p. isc. — IIokn, 

 Trans. Amer. Phil. Soc, XIV, 1S70, p. 31.''.. 



Elongately oblong-ovate to ovate, upiforni, usually about three 

 times longer than wide, subopaque; elytra muricato-granulate later- 

 ally and on the apex. 



Head less than twice as wide as long, feebly convex, more or less 

 impressed laterally and ver}^ vaguely along the frontal suture, the 

 latter not evident ; surface scarcely coarsely, irregularly, and densely 

 punctate, punctures denser laterally and on the epistoma, where they 

 bear minute setae. Antemice moderate in length and equal in the 

 sexes, somewhat stout, very feebly compressed, and more or less 

 slightly dilated in outer four joints; the third equal to the next two 

 combined; fourth and fifth equal in length and apparently just the 

 least shorter than the sixth or seventh, which are subequal ; eighth 

 about as wide as long and subtriangular ; ninth and tenth more or 

 less transversely oval; eleventh ovate, truncate at tip. 



