282 PROCEEDINGS OF THE NATIONAL MUSEUM Von. 113 
Key to the Species of the Smicronyx corniculatus Group 
1. Allscales white... . i Sf s-ere Jie eee 
White scales mixed with peales of pacihen polor BREN § Ar pat te « heppep ge 
2. Rostrum, elytra, and femora distinctly reddish; nrounenses black punctures 
of the disk not confluent. ... . . . S.commixtus Dietz (p. 294) 
Rostrum, prothorax, elytra, and femora black, piceous or brown but never 
reddish; punctures of disk confluent . . . : 2 ot Ree 
3. Prothorax and elytra black to piceous, sides of protons: ‘distinctie rounded. 
S. ealifornicus Dietz (p. 287) 
Entire body reddish brown, sides of prothorax nearly parallel from base to 
point of convergence toward apex . S. immaculatus, new species (p. 292) 
4. Punctures of prothoracice disk not confluent, or if some punctures are con- 
fluent, no oblique rugae present, transverse patches of white elytral scales 
very indistinct . . .... : fra eeO 
Punectures of prothoracic dite pondient. the ferences “ssmies oblique 
wavy rugae; transverse patches of white or light scales usually distinct . 6 
5. Prothorax suddenly narrowed toward apex, punctures of disk deep; body 
length usually greaterthan2.0mm... . . S. utilis Buchanan (p. 296) 
Prothorax not suddenly narrowed toward apex, punctures shallow; body 
length less than 2.0 mm... ... . . S.perpusillus Casey (p. 286) 
6. Rugae of prothoracic disk raised as distinct ridges, not flat; scales of prothorax 
gray, brown, or white, but never yellow... . Me oy SC 
Rugae of prothoracic disk flat, part of scales of Satins nn alyera distinctly 
yellow 5 =< =. ... . . S. flavicans LeConte (p. 290) 
7. Scales of rostrum, iaeiowie ane elgees mostly grayish white, mottled with 
light brown on elytra; prothorax black or nearly so; body length usually 
near 2.70mm... . . .. ..  S. pallidus, new species 7 (p. 288) 
Seales of rostrum, protsorax: and elytra mostly light to medium brown, 
mottled with white on elytra; prothorax medium to dark reddish brown; 
body size usually smaller than above, nearer 2.30 mm. in length. 
S. corniculatus (Fabraeus) (p. 282) 
Smicronyx corniculatus (Fahraeus) 
Ficurss 6, 7, 33, 76, 126 
Tychius corniculatus Fahraeus, in Schoenherr, Genera et species curculionidum 
., vol. 7, part 2, p. 319, 1843. Lectotype, here designated: Male, 
“Pensylvan.,’’ collected by Zimmermann; Naturhistoriska Riksmuseet, 
Stockholm (Schoenherr collection). 
Smicronyxz squamulatus LeConte, Proc. Amer. Philos. Soc., vol. 15, p. 173, 1876. 
Lectotype, here designated: Female, Detroit, Michigan, collected by Hub- 
bard and Schwarz, MCZ 1923 (J. L. LeConte collection). 
Smicronyx spurcus Casey, Ann. New York Acad. Sci., vol. 6, p. 393, 1892. New 
Synonymy. Type: female, Texas, USNM 36705 (T. L. Casey collection). 
Smicronyx connivens Casey, Ann. New York Acad. Sci., vol. 6, p. 398, 1892. New 
synonymy. Type: Female, St. Louis, Missouri, Sept. 8, 1889, collected by 
Hugo Soltau, USNM 36707 (T. L. Casey collection). 
Smicronyx columbianus Dietz, Trans. Amer. Ent. Soc., vol. 21, pp. 162, 163, 
pl. 8, figure 22, 1894. Lectotype, here designated: Male, “‘D.C.,’”’ MCZ 1912 
Dietz collection). 
Smicronyx lanuginosus Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 165, 1894. 
Lectotype, here designated: Male, ‘‘Pa.,’”?” MCZ 1914 (Dietz collection). 
7 Not known to occur outside of the Great Basin region. 
