122 



Thomas, Cyrus.— Idem. 7th Rep. St. Ent. 111., pp. 36-38, 

 fig. 8. Description of male and female, and comparison 

 with allied forms. 



Thomas, Cyrus.— Idem. 0th Rep. St. Ent. 111., i3p. 121-123, 

 figs. 19, 20, 21. (Acrididce of Illinois.) (See under 1878.) 



Riley, Packard, and Thomas. — Idem. 2d Annual Rep. U. S. 

 Ent. Com. Additions to the chronology of ravages, and 

 their relation to agriculture and the settlement of the ter- 

 ritories. Meteorological influences. Southern limits of dis- 

 tribution. Summary of locusts' flight!^. The air sacs of 

 locusts with reference to their powers of flight. Histology of 

 the brain, further facts about natural enemies. Courses that 

 may be adopted by general" government to lessen injury. 



Bruner, Lawrence. — Idem. 3d Rep. U. S. Enh Com., pp. 

 8-52. Occurrence in Montana in 1880; in Wyoming, Mon- 

 tana, etc., in 1881. 



Bruner, Lawrence. — Idem. Rep. Com. Agr., 1884, p. 398. 

 Occurrence in Nebraska in 1884. 



80. Pezotettix differentialis, Thos. 



Thomas, Cyrus. — Acridium cliff erentialis. Trans. 111. St. Agr. 

 Soc, v., 450. Original description. 



Walsh & Riley. — Caloptenus dff erentialis. Amer. Ent., Il, 16. 

 Abundance in Illinois in 1868, and its replacement by Cal- 

 optenus hivittatiis in vicinity of Chicago. 



TaoMAS, Cyrus. — Idem. Proc. Acad. Nat. Sci. Pliila., 1371, 

 p. 149. Species more fully described, male and female. 



Thomas, Cyrus. — Idem. Rep. U. S. Geol. Surv. Terr. V., Part 

 I., p. 166. (Synopsis of the Acrididse of N. A.) Descrip- 

 tion of imago, and distribution. 



Thomas, Cyrus. — Idem. Daily Inter Ocean, October 9, 1875. 

 Notes the flights of this species, and believes it will never 

 become habitually migratory. 



Thomas, Cyrus. — Idem. 6th Rep. St. Ent. 111., pp. 44, 45* 

 Instance of its migration in Illinois. This probably not 

 habitual. 



Riley, C. Y. — Idem. 1st Annual Report U. S, Ent. Com., pp. 

 443-448. Migratory habit, distribution, injuries. Modified 

 form of migratory insects. 



Thomas, Cyrus.— Idem. 9th Rep. St. Ent. 111., pp. 127, 131- 

 140. Description of imago; life history; injuries; remedial 

 agencies. 



Bruner, Lawrence. — Idem. Rep. Com. Agr. 1834, p. 399. 

 Largely on the increase in western Iowa and eastern and 

 central Nebraska. 



Forbes, S. A.— Idem. 14th Rep. St. Ent. 111., p. 23. Lv 

 jury to Indian corn in Southern Illinois. 



