NOKTH AMKIIICAN COLKOl'TKRA. 161 



Claws very small, scai'cely (iivergeiit, posterior til)ial hooks scareeiy i)erfe])til)le. 



perfidiiM. 

 Claws moderate, divergent, posterior tibial hook distiuet. 

 Conspicuously variejiated above, sciales variable in size. 



Larger, scales predomiiiei)tly yellow, or ochreous gi'ay, mottled witli pale 



brown iiiHC'lllattiN. 



Smaller, scales predominently dark brown, mottled with whitish. 



coliiiiibiaiius. 

 Scales unicolorous or nearly so, not conspicuously mottled .'ibox'e, scales sub- 

 orbicular or broadly oval, scarcely varying in size. 

 Dark piceous or black, legs reddish or rufo-jjiceous, scaly vestiture dense. 

 Antennje of male inserted just before the middle, scales ochreous or yel- 

 lowisli gray, prothorax strongly rounded on the sides. 



calif'oriiiciis. 

 Antenna' of male inserted two-fifths from the ape.x, scales predoniinently 

 dark brown, rarely pal?, inconspicuously mottled. 

 Stouter form, prothora.x wider than long, sides distinctly rounded. At- 

 lantic slope species. 



Elytral setje not obvious C4»i*iii(*iilHtiiK. 



Elytral sette distinct, long, hair-like. laiiii^iiiowuw. 



More slender, prothorax not wider than long, broadly rounded on the 



sides. Pacific slope species spurcus. 



Entirely reddish or ferruginous; scaly vestiture less dense. 



Elytra suddenly and mucdi wider at the base than the prothorax, latter 

 coarsely punctured. 

 Prothorax not wider than long, very broadly rounded on the sides. 



abiioriiiis. 



Piothorax wider than long, rounded on the sides vitioNU$$. 



Klytra not suddi^nly wider at the base; i)rothorax finely jiunctate. 



I'llfllllliii. 



S. |»orli<llls n. s)). — Sub-oval, robust, rufo()ice()us, legs rufous, not densely 

 clothed with small, grayisli and pale brown scales, the latter very small. Beak 

 (male) rather stout, feebly curved and slightly tapering from base to apex, feebly 

 substriate from base to beyond the middle, strise punctured, a median, smooth, 

 elevated line, finely grooved about the middle, shining toward tlie apex, thinly 

 clothed with suberect, piliform scales: scrobes subparallel, upper margin visible 

 in its whole extent ; basal tufts feeble, incision marked; antennpe slender, in- 

 serted a little before the middle, second joint nearly twice the length of tlie 

 third, outer joints .scarcely wider. Head rugulose, remotely punctured and 

 sparsely clothed with hair-like scales. Prothorax a little wider than long, feebly 

 narrowed in front, broadly but not obviously cotistrictcd at the apex, regularly 

 rounded on the sides, surface densely and coarsely punctured, punctures elon- 

 gate, directed obliquely toward the median Hue and subconfluent in their longi- 

 tudinal axis, giving thereby the appearance of oblique striations with inter- 

 vening ridges, a smooth median line, confined to the n)iddle two-fourths, scales 

 very sparsely ])laced, a little more dense on the sides, erect setaJ short. Scutel 

 distinct, scaly. Elytra two-fifths and rather suddenly wider at the base than 

 the prothorax, with the humeri inoniinent, slightly impiessed on the sides behind 

 the latter, a trifle widened to behind the middle, sides nearly straight one-half 



TRANS. AM. ENT. SOC. XXI. (21) JUNE, 1894. 



