SMICRONYX WEEVILS—ANDERSON 261 
oblong elliptic and linear, dark brown, except for a broad median 
vitta of white scales and a few scattered white scales; prosternum 
moderately emarginate and concave. 
Elytra black, except for a broad reddish stripe on the fourth to sixth 
intervals; scales elliptical, medium yellowish brown except for white 
scales on both humeri and several scattered patches of white scales. 
Underside of the thorax and abdomen black, covered with ovate 
white scales. Femora strongly clavate, rufous, covered with elliptical 
white and light brown scales. Tibiae rufous, covered with elliptical 
and elongate yellowish white scales. Tarsi rufopiceous, the third 
segment not much broader than the first two, the fourth segment 
extending well beyond the third; claws slightly divergent, connate for 
less than half their length. Male genitalia as in the group description. 
MeasureMEnts: The following measurements were taken from 
6 males and 1 female from Gila Bend, Arizona (CNHM), 2 males 
and 6 females from Presidio, Texas (USNM). All measurements are 
in millimeters: 
Males Females 
Mean Extremes Mean Extremes 
Body length 2. 38 2.30-2.60 2.47 2. 20-2. 70 
Elytra length 1. 61 1.50-1.70 1.68 1. 50-1. 70 
Elytra width at base 0. 94 0.69-1.00 0.98 0. 86-1. 00 
Prothorax length 0. 61 0. 56-0.66 0. 64 0. 59-0. 66 
Prothorax width 0. 64 0. 56-0. 73 0.68 0. 63-0. 69 
Rostrum length 0. 80 0. 76-0. 86 0. 92 0. 89-1. 00 
Rostrum length before antennal 0. 22 0. 20-0.26 0.35 0. 30-0. 40 
insertion 
Funicular segment 2 length 0. 051 0. 051 
Funicular segment 3 length 0. 034 0. 034 
Brotoay: The host-plant records which follow were taken from 
thematerial examined. “on Sphaeralcea angustifolia foliage,” Presidio, 
Tex., April 2 and 4 (USNM); ‘on Sphaeralcea sp. foliage,” near 
Presidio, Tex., April 4 (USNM); “on wild sunflower foliage,” near 
Presidio, Tex., June 8 (USNM); ‘“‘with sunflowers,”’ Presidio, Tex., 
May 28 (USNM); “‘on Prosopis sp.,”’ near Presidio, Tex., Apr. 4 
(USNM); “collected on cotton,” Tucson, Ariz., Aug. 24 (USNM). 
DisrripuTion: The records taken from the material examined 
indicate that the range of S. spretus extends from the Great Bend 
section of the Mexican highland into the southern portion of the 
basin and range province. The following specimens were examined: 
ARIZONA: COCHISE co.: Chiricahua Mountains, May 10, June 1-17, July 1; 
Huachuca Mountains (USNM), Sept. 11 (CNHM); Huachuca Mountains 
(Carr’s Peak), June 25 (USNM); Tombstone, Sept. 14 (CM and CNHM). 
MARICOPA Co.: Gila Bend, Sept. 15 (CNHM). prma co.: Tucson, Aug. 24 
(USNM). 
New Mexico: poNA ANA co.: Las Cruces, Sept. 20 (USNM). Grant co.: 
Faywood, May 31 (CNHM); Silver City, June (CU), July (CAS). HIDALGO Co.: 
