296 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
genitalia of the two species are similar in shape, the internal sac bears 
a longitudinal band of dark spines on each side in S. commiztus, but 
not in S. utilis. 
After examining the type specimens of S. caseyi Blatchley and S. 
commiatus Dietz, the writer has concluded that Buchanan (1941) was 
correct in stating that these two names are synonymous. 
DistriputTion: Records from the material examined indicate that the 
range of S. commiztus extends from the Central lowlands in Kansas 
westward across the Great Plains into the Southern Rocky Mountains, 
Northern Rocky Mountains and Great Basin region. The following 
specimens were examined: 
ALBERTA: Lethbridge, May 6 and June 23 (CNC); Medicine Hat, Aug. 22 
(CNC); Medicine Hat, Aug. 16 (CAS); Medicine Hat, Aug. 24 (USNM). 
CoLORADO: ADAMS Co.: Denver, June, June 17 (USNM); Denver, July (CM). 
CAFFEE Co.: Buena Vista, April 7 (USNM). tt paso co.: Colorado Springs 
June 15, June 15-30 (USNM); Colorado Springs, June 15-30 (AMNH); Gunni- 
SON Co.: Coal Creek Canyon, July 11 (USNM). HuERFANo co.: La Veta, April 7 
(USNM). Larimer co.: Fort Collins, Sept. 6 (USNM); Poudre River, May 
(USNM). mesa co.: Mesa, July 13-31, Aug. 6-31 (CNHM). Morrart co.: 
July 24 (CM). puEsBLo co.: Pueblo, May 20 (USNM). ‘‘Col.’”’? Aug. (USNM). 
“Colo.”? (CM, CU, USNM). 
IDAHO: ADA Co.: Parma, Aug. 13 (CAS). 
KANSAS: FINNEY Co.: Garden City, May 22-29 (USNM). Rooks co.: Stock- 
ton, July 7 (CAS). SHAWNEE Co.: Topeka, June (CM). wWa.uace co.: Wallace 
(CAS); Wallace, July (USNM). ‘‘Kans.’’ (CNC). 
Manirosa: Lyleton, Aug. 23 (CNC). 
MonrTANA: CUSTER Co.: Miles City, July 23 (USNM). GaALuaTiIn co.: Boze- 
man, Montana Experiment Station, June 30, Aug. 20 (USNM); Gallatin Canyon, 
July 30 (CNC). smrreRson co.: May 22 (USNM). LEWIS AND CLARK CO.: 
Helena (CNC). MEAGHER Co.: Montana Experiment Station, Aug. 22 (USNM). 
MUSSELSHELL Co.: Musselshell, Montana Experiment Station, Aug. 21 (USNM). 
“Mont.” (AMNH & CNHM). 
New Mexico: RIO ARRIBA Co.: July 18 (USNM). ‘TORRANCE Co.: no data 
(USNM). 
SASKATCHEWAN: Swift Current, Sept. 12 (CNC). 
SoutH Dakota: JACKSON co.: Cedar Pass, July 22 (USNM). 
UTAH: BEAVER Co.: Milford, July 7 (USNM). sat LAKE co.: Murray, Aug. 
22 (USNM); Salt Lake, June 21 (USNM). srvier co.: Elsinore, Aug. 5 
(USNM). vtntTaH co.: July 15-18 (CM). vurTan co.: Provo, Aug. (CAS). 
Total specimens examined: 298. 
Smicronyx utilis Buchanan 
Fiaures 81, 131 
Smicronyx utilis Buchanan, Proc. Ent. Soc. Washington, vol. 43, No. 2, pp. 29- 
32, figs. 1-5, 7-11, 1941. Holotype: Male, Regina, Saskatchewan, Canada, 
June 15, 1939, collected by J. G. Rempel, USNM 54279. 
Description: Rostra of both sexes reddish to piceous, moderately 
curved, thinly squamose behind antennal insertions; feebly carinate 
