1907.] NATURAL SCIENCES OF PHILADELPHIA, 489 



3. Larger, G-7 mm.; clypeus paler tliaii flio front; plates and stiles 



of the male distinctly shorter tlian the i)y,<i;ofers, .... 4. 



— . Smaller, 5 mm.; face entirely black Avith pale carina; plates and 



stiles of the male as lonsi; as the pygofers, . colccpeum Fitch. 



4. Len<Tth 7 mm.; clypeus al^yuptly paler, at base strongly angled; 



plates of the male less than half the length of the pygofers; 

 elytra generally quite strongly maculated, their base more or 



less distinctly fuscous, basalis Van D. 



— . Length mm.; clypeus less strongly differentiated; plates more 

 than half the length of the pygofers; elytra almost immaculate 

 or Avith some small broken spots beyond the middle, base not 

 darker jnJii Fitch. 



Cixius basalis n. sp. 



Size and general aspect of Oliarus 5-lineatus. but readily distinguished 

 by the three mesonotal carinse. Vertex short transverse, arcuated, 

 its anterior and posterior margins about parallel, its outer angles 

 rounded, median carina not pronounced; transverse compartment at 

 the apex of the head but slightly narrowed at center. Front pro- 

 portionately longer than in pi7ii. but shorter than in stigmatus; black 

 with the strong carina fulvous ; clypeus abruptly fulvous, its apex and 

 the tylus blackish, basal margin strongl}^ angled. Pronotum linear 

 and deeph^ angled as in the allied species; soiled fulvous-yellow as are 

 the carinte of the vertex and the tegulse; mesonotum deep black with 

 a pale point at the posterior end of each carina. Elytra abruptly 

 widened near the base, then almost parallel to the stigma; whitish 

 hyaline, nervures white conspicuously dotted with black, costal 

 stronger with about 16 larger dots before the stigma, a few of which 

 are grouped where the transverse band touches the margin; the radial 

 forked nearer the base than is the second ulnar. In fully marked speci- 

 mens the base of the elytra are deep fuscous or black to behind the tip 

 of the scutellum; a broken linear transverse band crosses about half- 

 way to the stigma and another at the stigma; sometimes there is a 

 costal spot between these bands, and the transverse nervures at the 

 base of the apical areoles are heavily brown. Frequently the base is 

 but slightly obscured and the anterior band and costal spots or all the 

 markings are wanting or feebly indicated. Beneath black varied 

 with soiled yellow; legs pale with the femora more or less fuscous. 

 Abdomen black with the narrow edges of the segments and base of the 

 genital pieces of the female pale; in the male the plates, inferior surface 

 of the pygofers at base and a dot at each incism-e on the edge of the 

 abdomen is pale. Plates of the male short, slender at base, abruptly 

 expanded above in a transverse oblique plate lying against the slightly 



