112 LENG AND HAMILTON. 



G. tigrina De Geer, 1775 {Cerambyx), Ins. v. p. 113, pi. 14, fig. 6; Lee, 1852. 

 sor. 2, ii, p. 150; Monohammus iomeitto.ms Ziegler, Proc. Acad, ii, p. 47: 

 IlaUl., 1. c. p. 51 ; tigris Schoeuh., Syn. Ins. i, 3, p. 383. 

 Length 25 mm. ; 1.00 inch. Ilabilat. — Florida, Maryland, Pennsylvania, New 

 Jersey, New York, Canada West. 



G. pulc'lira Hald., 1847 {Monohammus), 1. c. p. 1.50. 



Length 23 mm. ; .92 inch. Habitat. — South Carolina, North Carolina, I'enn- 

 sylvania. New Jersey. New York, Vermont, Ohio, Louisiana. Breeds in 

 hickory. 



G. debilis Lee, 1852, 1. c. p. 1.50. 



Length 11-13 ram. ; .44.52 inch. Habitat. — Pennsylvania, New Jersey, New 

 York, Iowa, Louisiana. 



G. tessolata Hald., 1847 {Monoliammus), 1. c. p. 51 ; Lee. 1. c. p. 1,50. 



Length 20 ram. ; .80 inch. Habitat. — Georgia, N. Jersey, New York, Louisiana. 



G. pillveriilenta Hald., 1847 (Monohammus). 1. c. p. 51 ; Lee, 1. e p. 150. 

 Length 20-22 ram. ; .89-.88 inch. Habitat. — Florida, Pennsylvania, New Jersey, 

 New York, Massachusetts, Ohio. Breeds in beech and in wild cherry. 



G. ociilala Lee, 1862, Proc. Acad. p. 40. 

 Length 10-11 mm.: .40-.44 inch. Habitat. — Pennsylvania, New York, Canada 

 West, Ohio, Wisconsin. 



PL.ECTRODERA LeConte. 



I*. K('alat4»i* Fab., 1775 {Lamia). Ent. Syst. i, 2, p. 278; {Cerambyx) Oliv., 1795, 

 Ent. iv, 67, pi. 22, fig. 172: Lee, ia52, Journ. Ac. Phil. ser. 2, ii, p. 151; 

 Lamia belli Lee, Bost. Journ. v, p. 209; scalator Lee, 1. c. pi. 18, fig. 11. 

 Length 25.35 ram. ; 1.00-1.40 inch. Habitat. — Texas, Louisiana, Kansas. Mis- 

 souri, Nebraska, Illinois, Montana, Western Pennsylvania, District of 

 Columbia. 



Black, shining, with conspicuous white pubescence arranged in 

 irregular transverse fasciae. The Montana specimens bear nuich 

 more pubescence than tho.se living in the Missis.sippi Valley. 



[Breeds in various })oplars {Pojtulm), which are sometimes greatly 

 injured by the larvic] " Ham." 



Tribe VI. Mesosini. 

 Contains one species. 



SyiiaplKCla j^iie.vi Lee, 18.52 (3Iesosa), Journ. Ac. Phil. ser. 2, ii, p. 166; U. 

 S. Pacif. K. K. Surv. vol. xii, part ii, Zool. Ent. Eept. 1857 {separatum), p. 

 66, pi. 2, fig. 16; Tlioms., Syst. Ceram. p. 60. 

 Length 12-19 mm. : .48-.76 inch. Habitat. — California, Vancouver. 



A large stout insect with gray pubescence; antenna' annulate, 

 prothorax with two black vittse and elytra each with two angulated 

 black l)ands. 



