284 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 118 
Brotocy: The writer collected S. corniculatus from the foliage of 
Ambrosia artemisiifolia L. in 1957 at Dryden, N.Y. (Aug. 17), Oswego, 
N.Y. (Aug. 18), and Ithaca, N.Y. (Aug. 20, Aug. 31-Sept. 11). No 
larvae were obtained from the seeds of the Ambrosia during that time, 
although the seeds of several dozen of the plants from which the weevils 
had been collected were examined. 
A few other host-plant records were taken from the collection of B. D. 
Valentine: “On Ambrosia artemisifolia,” Crescent City, Fla., Sept. 14, 
Enterprise, Fla., Sept. 14, Sparr, Fla., Sept. 16; “sweeping Ambrosia 
artemisiifolia,”’ Milford, Delaware, Sept. 11. 
Discussion: After examining the type or lectotype specimens of the 
species listed in synonymy under Smicronyz corniculatus (Fabraeus), 
the writer has concluded that they are conspecific with the lectotype 
of S. corniculatus. 
Buchanan (1941) placed the names Smicronyx connivens Casey and 
Smicronyz spurcus Casey in synonymy with Smicronyz vestitus 
LeConte. However, examination of the type specimen of S. vestitus 
LeConte has proved that species to have the general features of the 
subgenus Smicronyz (as shown on p. 232), a black prothorax and pale 
rufous elytra. The type specimens of S. conniwens Casey and S. 
spurcus Casey share the general features of the subgenus Pseudo- 
smicronyz (see p. 279), have piceous elytra, and appear to be specimens 
of S. corniculatus with lighter scales. 
Disrripution: The numerous records indicate that S. corniculatus 
is widely distributed on the Atlantic and Gulf coastal plains, in the 
Appalachian highlands, and in the central lowlands. The following 
specimens were examined: 
District oF CoLtumBIA: Washington (CU); Washington, July 18 and 30, Aug: 
3 and 6 (USNM); ‘“‘Eastern Branch,” July 8 (USNM); “D.C.” (USNM). 
FLORDIA: DUVAL Co.: Jacksonville, May 30 (USNM). 
ILLINOIS: CooK co.: No data (CNHM); Beverly Hills, Sept. 11 (CNHM). 
DUPAGE Co.: Downer’s Grove, Aug. 4-5 (CNHM); Glen Ellyn, Sept. 9 (CNHM). 
“S. Il,” Aug. 8 (USNM). 
INDIANA: KOSIUSKO co.: July 14 (CM). LAKE co.: Hessville, Sept. 5 and 22, 
Oct. 11 (CM). ta porte co.: La Porte, (CM). Marion co.: May 6 (CU). 
PORTER Co.: Beverly Shores, June 28 (CNHM). putnam co.: May 15 (CU). 
TIPPECANOE Co.: Lafayette, Aug. 17 (USNM). 
IOWA: DICKINSON co.: Lake Okoboji, Aug. 22 (USNM). soHNson co.: Iowa 
City, Sept. 3 and 9 (USNM). story co.: Ames, July (USNM). 
Kansas: ‘‘Kans.”’ (USNM). porrawaToMIE co.: Onaga (USNM). SHAWNEE 
co.: Topeka, June (CM). 
MARYLAND: BALTIMORE Co.: Sparrows Point, July 4-9 (USNM). mMont- 
GOMERY Co.: Cabin John, Oct. (USNM); Glen Echo, June 24, July 16, Aug. 1 and 
24 (USNM). pRINCE GEORGES Co.: Beltsville, June 30, July 9 and 24, Aug. 31 
(USNM); Bladensburg, July 19, Sept. 4 (USNM); Hyattsville, Aug. 2 (USNM); 
Riverdale, July 10 (USNM). 
