SUBGENUS TRICHAPION — KISSINGER 377 



Special male characters: Tibiae 2 and 3 armed with long, sub- 

 dentate mucrones, front tarsus dilated and densely pubescent on 

 ventral surface. 



Material examined: 150 specimens. 



Known distribution: 



United States: Arkansas: Crawford Co., May 14, 1939, M. W. Sanderson 

 (INHS); Franklin Co., May 19, 1940, L. Warren, on black locust (INHS.) 

 District of Columbia: beating pine (USNM) . Georgia: Rabun Co., Leng (USNM) . 

 Illinois: Charleston, June 7, 1941, Ross and Mohr (INHS); Coulterville, June 7, 

 1940, L. M. Smith, on black locust (INHS); Toledo, July 7, 1950, Ross and 

 Sanderson (INHS); Topeka, Aug. 17, 1907 (USNM). Indiana: Clay Co., 

 July 8, 1935, on locust (USNM); Blatchley and Leng (1916) state species is com- 

 mon throughout the State. Iowa: Story Co. Kansas. Louisiana: Tallulah, 

 May 9, 1910, G. D. Smith, on Rohinia pseudacacia (USNM). Maryland: Belts- 

 ville, Aug. 24, 1922, I. L. Buchanan (USNM); Chespeake Beach, Wrenn and 

 Barber (USNM); Great Falls, July 2, 1919, L. L. Buchanan (USNM); Hagers- 

 town, July 3, 1917, W. E. Pennington (USNM); Lakeland, September 1895, 

 Chittenden (USNM). Massachusetts: West Medford, July 21, 1919, R. H. Van 

 Zwaluwenburg (USNM). Mississippi: Natchez, June 6, 1895, H. E. Weed 

 (USNM). New Jersey: Many records. New York: Bellport, Long Island, 

 June 11, 1912, A. Nicolay (USNM); Ithaca, Chittenden (USNM); Peekskill 

 (USNM); Portage, May 30, 1885, E. O. VanDuzee (CIS); Staten Island (USNM); 

 West Point, May 12, 1913, W. Robinson (USNM). North Carolina: Tryon, 

 W. D. Pierce (USNM). Ohio: Franklin Co., May 16, 1949, E. L. Sleeper (ELS); 

 Ross Co., Hubbard and Schwarz (USNM). Pennsylvania: Glenolden, June 16 

 (USNM); Philadelphia, June 18, 1897 (USNM). South Carolina: Rocky 

 Bottom, May 22, 1934, J. A. Berly (USNM) ; Charleston, Aug. 5, 1938, W. J. Reid 

 (USNM). Tennessee: Clarksville, Apr. 23, 1919, E. R. Jones (USNM); Gatlin- 

 burg, June 14, 1947, R. H. Wittaker (USNM). Vermont: Bergen Co. (USNM). 

 Virginia: Many records. West Virginia: "Berkley," Hubbard and Schwarz 

 (USNM); Harper's Ferry, May 19, Hubbard and Schwarz (USNM); White 

 Sulphur Springs, Aug. 1, 1914, W. Robinson (USNM). Wisconsin: Waupaca, 

 June 14, 1920, L. G. Centner, feeding on locust (USNM). 



Remarks: Blatchley and Leng (1916) state that this species 

 develops in the seeds of black locust, Rohinia pseudacacia L., and 

 that the adults riddle the leaves of the tree. Recorded also as feeding 

 on the foliage of peach and wild cherry. 



Apion rostrum Group 



The sLx species comprising this group are distinct in that the pro- 

 thorax is as wide or slightly wider at the middle than at the base, the 

 sides are not strongly rounded; the beak is attenuate to near the apex; 

 and typically the male has tibiae 2 and 3 mucronate, but in three 

 species the front tibiae are also mucronate. The ranges of four 

 species overlap. A. confertum Smith and A. furtivum Fall occur 



