AMERICAN COLEOPTERA. 175 



green ; thorax cylindrical, granulate, with a fringe of white hair on 

 either side, impressions moderate, green at base ; elytra granulate, 

 parallel, serrulate at apex, which is separately rounded in 9 ; be- 

 neath, the palpi, coxae, pleurae, legs and sides of abdomen are densely 

 clothed with decumbent white hair, but the flanks of the thorax are 

 glabrous (by which character alone this species might be separated) ; 

 palpi pale, legs red ; trochanters and anus pale. The labrum is 

 large and emarginate at middle. 



This species presents so many points of difference that it might 

 even be set apart as representing a different genus. 



ViRiDiSTiCTA group. 



Subcylindrical, small, opaque brown cupreous with preen fovese ; bead finely 

 striate; palpi pale; legs, in part, pale; sericeous above, almost glabrous 

 beneatb. viridisticta. 



</'. Tiridisticta Bates, 1881, Biol. Cent. Am., part 1, p. 14, pi. 1, fig. 20; Scbaupp, 

 L c, p. 103. 

 Length 6.5-14 mm.=.26-.28 inch. 



Habitat — Arizona. Collected in 1893 by H. K. Morrison, and 

 recently by Prof. Wickham. Occurs also in Mexico. 



Head brown cupreous, finely striate in front and between the eyes, 

 punctulate behind, glabrous; thorax cylindrical, granulate with a 

 fringe of hair on either side; elytra subparallel, brown cupreous, 

 with distant coarse green punctures and an irregular row of larger 

 green foveae; white markings consist of apical lunule, short middle 

 band, sinuate, not reaching the margin, sometimes reduced to a tri- 

 angular spot, and a post humeral spot, sometimes lacking, lateral 

 margin broadly polished. Beneath polishe<l blue, trochautei'S, palpi, 

 tibiae and tarsi pale, scarcely hairy. 



RuFiVENTRis group. 



Abdomen red ; labrum one toothed ; palpi pale ; head not hairy, very finely striate 

 all over; elytra conjointly rounded in both sexes; surface sericeous; 

 a fringe of hair on each side of the thorax above ; sparsely hairy 

 beneath on flanks of thorax, pleurae, sides of abdomen, legs and palpi ; 

 elytral markings, when complete, include humeral lunule, middle 

 band, apical lunule and additional spots between the middle band and 

 the apical lunule. 



Greenish black, middle band long and obliquely sinuate- .hxemorrhagica. 



Greenish black, immaculate or nearly so var. pacifica. 



TKANS. AM. ENT. SOC, XXVIII. JUNE, 1902. 



