GRASSHOPPER BIBLIOGRAPHY. 63 



Acridium differentiate. THOMAS, Trans. 111. St. Agric. Soc., V (1865), p. 450. 



Cyrtacanthacris differentialis. WALKER, Cat. Derm. Salt. Brit. Mus., IV 

 (1870), p. 610. THOMAS, Proc. Acad. Nat. Sc. Philad., 1871 (1871), p. 149. 



Pezotettix differentialis. STAL, Bih. k. Sv. Vet.-Akad. Handl., V (1878), No. 

 9, p. 14. WEED, Misc. Ess. Econ. Ent. 111. (1886), p. 48. HUNT, ibid. (1886), pp. 

 122-123, 126. WEED, Rep. Ent. 111., XV (1889), p. 40. GARMAN, Orth. Ky. (1894), 

 pp. 4, 8. 



Melanoplus differentialis. BRUNER, Bull. Washb. Coll., I (1885), p. 139; 

 ibid., I (1886), p. 200. RILEY, Rep. U. S. Ent., 1885 (1886), p. 233. COQUILLETT, 

 ibid., 1885 (1886), pp. 295, 297. BRUNER, Bull. Div. Ent. U. S. Dep. Agric., XIII 

 (1887), p. 33; Rep. Ent. Nebr. Bd. Agric., 1888 (1888), p. 88, fig. 4. COMSTOCK, 

 Intr. Ent. (1888), pp. 108, 111, fig. 100. SMITH, Bull. N. J. Exp. St., K. (1890), p. 

 41. BRUNER, Bull. Div. Ent. U. S. Dep. Agric., XXII (1890), p. 104. BLATCH- 

 LEY, Can. Ent., XXIII (1891), p. 99. BRUNER, ibid., XXIII (1891), p. 193; Ins. 

 Life, III (1891), p. 229. WEBSTER, ibid., Ill (1891), p. 300. BRUNER, ibid , IV 

 (1891), p. 22; Rep. Ent. Soc. Ont., XXII (1891), p. 48; Bull. Div. Ent. U. S. 

 Dep. Agric., XXIII (1891), p. 14. OSBORN, ibid., XXIII (1891), p. 59. BRUNER, 

 Rep. St. Bd. Agric. Nebr., 1891 (1891), pp. 243, 307, fig. 84. McNEiLL, Psyche, 

 VI (1891), p. 74. SMITH, Bull. N. J. Exp. St., XC (1892), pp. 4, 31, pi. i. RILEY, 

 Ins. Life, IV (1892), p. 393. KELLOGG, ibid., V (1892), p. 116. WEED, Can. Ent., 

 XXIV (1892), p. 278. OSBORN, Proc. Iowa Acad. Sc., I, Pt. ii (1892), p. 118. KEL- 

 LOGG, Inj. Ins. Kans. (1892), p. 42, figs. 22, 23a. BRUNER, Bull. Div. Ent. U. S. 

 Dep. Agric., XXVII (1892), pp. 32-,33; ibid., XXVIII (1893), pp. 15-17, fig. 5; 

 ibid., XXX (1893), p. 35. OSBORN, ibid., XXX (1893), p. 47. BRUNER, Publ. Nebr. 

 Acad. Sc., Ill (1893), p. 27; Rep. Nebr. St. Bd. Agric., 1893 (1893), p. 461, fig. 103. 

 OSBORN, Ins. Life, V (1893), pp. 323-324; Papers Iowa Ins. (1893), p. 58. BRUNER, 

 Ins. Life, VI (1893), p. 34. OSBORN, ibid., VI (1893), pp. 80-81. BRUNER, Rep. 

 St. Hort. Soc. Nebr., 1894 (1894), pp. 1&3, 204, fig. 67; Bull. Div. Ent. U. S. Dep. 

 Agric., XXXII (1894), p. 12; Nebr. St. Hort. Rep., 1895 (1895), p. 69; Nebr. St. 

 Ag. Rep., 1896, pp. 120, 121, figs. 20, 21. SCUDDER, Proc. U. S. Nat. Mus., Vol. 

 XX, pp. 349-354, Pt. xxiii, figs. 3, 4, 1895 (1897). SNOW and HUNTER, Bull. Dept. 

 Ent. Univ. Kans. Oct. 1897, pp. 9, 10, pi. 11, fig. 4, 1897. LUGGER, 3d Rep. of Ent. 

 of Minn, for 1897 (1898), pp. 204-206, figs. 130, 131. 



TECHNICAL DESCRIPTION.* 



The largest of our species of Melanopli, and heavy bodied; excepting the hind 

 legs and the lateral lobes of the pronotuin, the general color is a nearly uniform 

 brownish testaceous, becoming paler testaceous in specimens from arid regions: 

 in those from Nebraska, Kansas and Colorado it is sometimes a blackish green, 

 while in those from Illinois and Indiana it is often of a dark brownish green. 

 The head has sometimes a pair of dusky, divergent stripes, passing from the pos- 

 terior corners of the fastigium backward across the vertex, and when these are 

 present there are often other but irregular streaks of similar tint on the genag and 

 clouds over parts of the face ; the vertex is gently arched, more gently in the female 

 than in the male, with a broad interval between the eyes, the fastigium broadly 

 and not very deeply impressed; frontal costa broad but narrower than the inter- 

 space between the eyes, percurrent, equal except for a slight expansion be- 

 low, broadly and shallowly sulcate below (and .including) the ocellus, punc- 

 tate; eyes moderately prominent, short, not a great deal longer than broad: 

 antennae fulvo- testaceous, nearly twice as long (male) or fully half as long 

 again (female) as the pronotum. Pronotum subequal, the metazona ex- 



*S. H. Scudder, in Proc. Nat. Mus. Vol. XX, pp. 350-352. 



