110 LENG AND HAMILTON. 



yi. niariiiorator Kirby, 1837, p. 169 {Lamia) mannoratn Rand.. 1838, Bost. 

 .louni. ii, ]). 42; faiitor Lee, 1852, 1. c. p. 149; acntus hacord., 1869, Gen. 

 Col. ix, p. 316. not.; maculosus Halcl., Tr. Am. Phil. Soc. x, 51. 

 Len^h 25 mm. ; 1.00 inch. Ilahitat.—'Novii Scotia to Late Superior. 



Tliis species is rare in collections. 



All the species of Monohammus are redescribed by Dr. Horn in 

 the Trans. Am. Eut. Soc. xii, pp. 191-192. They infest pine trees. 



PTYCHODES Serville. 



P. trilincatiis Linn.. 1771 (Cerambyx) ; Mant., Plant, vi, p. 532; Drury, Ins. 

 p. 91, pi. 41, fig. 1, 9 ; Lee. 18.52, 1. c. p. 146; Saperda vittafa Fab., 1777, 

 Gen. Maut. p. 231; Piychodes vittatns Hald., 1847, Trans. Am. Phil, x, p. 53. 

 Length 22-28 mm. ; 88-1.12 inch. Habitat. — Louisiana. 



A large brown insect ; a broad white stripe on each elytral side 

 margin and a common sutural stripe are all continued on the thorax. 

 Heretofore known to our lists as vittatus Fab. ; this insect, as noted 

 by the late H. W. Bates (Biologia v, 95), must be called tr'd'uieatus, 

 the Linnaean name having priority. 



DORCHASCHEMA LeConte. 

 The synopsis of Dr. Horn is as follows : 



Thorax truly cylindrical, longer than wide; general surface color less the pu- 

 bescence, brown. 



Thorax transversely wrinkled, the punctuation indistinct ; elytra densely cinereo- 

 pubescent with small, rounded, denuded spot behind the middle- wil«Iii. 



Thorax not wrinkled, punctuation distinct; pubescence of elytra rather sparse, 

 marmorate with ochreous spots, a denuded interrupted band behind the 

 middle alteriiatuiii. 



Thorax slightly tubularly narrowed behind the middle, nearly as wide as long; 

 color black ; disc of thorax finely rugose iligruill. 



D. wildii Uhler, 1855, Proc. Ac. Phil, vii, p. 217. 



Length 1.5-22 mm.; .60-.88 inch. Habitat. — Marj'land, Pennsylvania, Ohio, 

 Indiana. 



D. alternatiltn .Say, 1823 (Saperda), .lourn. Ac. Phil, iii, p. 405; Lee, ed. ii, 



188; Hald., 1847, Trans. Am. Phil, x, 54; Lee, 18.52, Journ. Ac. Phil. ser. 



2, ii, p. 147. 

 Length 8-12 mm. ; .32-.48 inch. Habitat. — South Carolina, North Carolina, 



District of Columbia, Pennsylvania, New Jersey, New York, Ohio, Illinois, 



Texas. 

 D. iiiKriiin Say, 1827 {Saperda), Journ. Ac. Phil, v, p. 272; Lee, ed ii, 330; 



Hald.. 1. c. ; Lee, 1. e 

 Length 8 10 mm. : .32-.40 inch. Habitat. — Virginia, Pennsylvania, New Jersey, 



New York, Massachusetts. Canada West, Northern Illinois, Louisiana. 



The first two species breed in mulberry and osage orange, the 

 third in hickory, from the dead limbs of which it may be obtained 

 in abundance. 



