(69) 
41. Acridium rubiginosum, Scudd. 
Acridium rubiginosum, Scudd., Bost. Jour. Nat. Hist., VII, 467. 
damnificum, Sauss. Rev. et Mag. Zool., XIII, 1861, 164. 
Occasionally met with in southern Illinois, in the oak regions. 
42. A. emarginatum, Scudd. Geol. Surv. Neb., 240. 
I have seen but a single Illinois specimen, which was captured by 
Prof. Forbes, at Normal. 
43. A. americanum, Druky. 
Gryllus americanus, Drury, 111., II, 3, 128, PI. 49, Fig. 2, 1770. 
succinctus, Linn. Syst. Nat.., 12th Ed., I, 699, 1767. 
serialis, Thunb. Mem. Acad. Pet., V, 241, 1815. 
Locusta tartarica, West, in Drury 111., I, 121. 
Acridium americanum, Scudd., Bost. Jour. Nat. Hist., VII, 466. 
rusticum, G-lov. 111., PI. 1, Fig. 15. 
(Schistocerca) americanum, Stal. Recens. Orth., I, 66. 
ambiguum, Thos. Synop. Acrid., 173. 
Common in southern Illinois, and occasionally found as far north as 
Normal and Champaign. 
Sub-fam. Tettiginae. 
Group Tettigini. 
44. Tettix ornata, Say. 
Acrydium ornatum, Say. Am. Ent., I, 10, PL Y, Fig. 1. 
Tetrix arenosa, Burm. Handb. Ent., II, 659. 
dorsalis, Harr. Rep., 186. 
quadrimaculata, Harr. Rep., 186. 
bilineata, Harr. Rep., 186. 
sordida, Harr. Rep., 187. 
Tettix ornata, Scudd. Bost. Jour. Nat. Hist., VII, 474. 
45. Tettigidea lateralis, Say. 
Acrydium laterale, Say. Am. Ent., PI. Y, Figs. 2 & 3. 
Tetrix lateralis, Harr. Rep., 187. 
Tettigidea lateralis, Scudd. Bost. Jour. Nat. Hist., VII, 477. 
46. T. polymorpha, Burm. 
Tetrix polymorpha, Burm. Handb. Ent., II, 659. 
parvipennis, Harr. Rep., 187, Fig. 82. 
Tettigidea polymorpha, Scudd. Bost. Jour. Nat. Hist., VII, 477. 
