BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
129 
1297. Thomas, 0. Temperature and rainfall as affecting the cliincli 
bug. Periodicity in its increase. <Amer. Ent., October, 1880 
[v. 3], n. s., v. 1, ])]>. 240-242. See: <Prairie Farmer, 10 Sep¬ 
tember, 1881. 
Data relating to the condition of the weather in Illinois, Iowa, and Missouri 
in relation to the outbreaks of Missus leucopterus; relation of rainfall to 
the appearance of the same; two successive dry years needed for the devel¬ 
opment of the species in injurious numbers; high temperature and dimin¬ 
ished rainfall the cause of excessive development of the cliincli bug. 
1298. Thomas, C. Sudden increase of one of our large locusts. 
<Amer. Ent., October, 1880 [v. 3],n. s., v. 1, p. 250. 
Abundance and ravages of Acridium americanum. 
1299. Thomas, C. Modification observable in locusts. <Amer. Ent., 
October, 1880 [v. 3], n. s., v. 1, p. 251. 
Structural changes observed in Camnirfa atrox adaptive to migratory habits. 
1300. Thomas, C. Notes on the army worm. <Moore’s Pural New 
Yorker, 1880, November, December. 
1301. Thomas, C. Ninth report of the State entomologist on the 
noxious and beneficial insects of the State of Illinois.—Fourth 
annual report by Cyrus Thomas. <Trans. Dept. Agric. State 
of Illinois for 1879, 1880, n. s., v. 9,142 + 3 pp., 30 figs. Sepa¬ 
rate: <Springfield, Ill., 1880, 142 -f 3 pp., 30 figs. 
Table of contents. 
List of illustrations. - 
Letter of transmittal. 1 
Cabbage insects. 7 
The European cabbage butterfly, Pieris rapes . 8 
The Southern cabbage butterfly, Pieris protodice ... ... 25 
The potherb butterfly, Pieris oieracea . 26 
North American species of Pieris. 26 
The cabbage Pionea, Pionea rimosalis . 37 
The cabbage Plusia, Plusia brassicce .. 40 
The painted Mamestra, Ceramica [=Mamestra\ picta , . 51 
The cabbage Tinea, Plutelta cruciferarum . 52 
Insects and other parasites affecting domestic animals. 57 
The sheep hot fly, (Estrus oris . 60 
The sheep tick, Melopbagus ovinus . 63 
The scab mite, Psoropies equi . 64 
Worms. 67 
Manual of economic entomology. Part III. The Acridkke of Illi¬ 
nois . 71 
Appendix. Cuts omitted from second report. 141 
Index. 143 
1302. Thomas, C. Questions answered. <Prairie Farmer, 8 January, 
1881. 
Winter habits of Missus leucopterus. 
6277-9 
