BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
89 
744. Forbes, S. A. A contagious disease of the European cabbage 
worm, Pieris rapw, and its economic application. <Proc. 7th 
Ann. Meeting for Prom, of Agric. Sci., 1880, p. 26. 
Remarks on diseases of tlie lower animals; practicability of utilizing these 
natural checks on insect multiplication by artificial manipulation; brief 
classification of contagious insect diseases; symptoms of the disease of 
Pieris rapce; micrococci of the fluids of diseased larvae; contagious char¬ 
acter of the disease; its irregular local distribution; culture and infection 
experiments. 
745. Forbes, S. A. Miscellaneous essays on economic entomology 
by the State entomologist and his entomological assistants. 
<Trans. Dept. Agric. State of Illinois for 1885, 1886, v. 23, pp. 
5-130. Separate: <Springfield, Ill., 1886, 130 pp. 
CONTENTS. 
Note. 3 
The entomological record for 1885. By S. A. Forbes. 5 
Experiments on the codling moth and curculios. By S. A. Forbes. 26 
A second contribution to the life history of the corn plant-louse (Aphis 
maidis Fitch). By H. Garman. 46 
On the injurious insects of central Illinois. By Clarence M. Weed_ 48 
Partial economic bibliography of Indian corn insects. By Thomas F. 
Hunt. 57 
Notes from Livingston and adjacent counties. By F. W. Goding. 127 
746. Forbes, S. A. Insects affecting corn. <Prairie Farmer, 1887, 
26 February; 5 March. 
Extract from a lecture before a farmers’ institute. Number of species known 
to infest corn; prospects for the future; two classes of corn insects; reasons 
for increase in recent times; prevention and remedy. 
747. Forbes, S. A. The chinch bug iu southern Illinois. <Circular 
[Office of State Entomologist], 15 April, 1887. Reprint: 
<Prairie Farmer, 30 April, 1887. 
748. Forbes, S. A. [Tipulidse.] <Oircular [Office of State Entomol¬ 
ogist], 28 April, 1887. Reprint: <Prairie Farmer, 7 May, 1887. 
Extensive and serious injury to meadows and pastures in southern Illinois, 
apparently due to crane-fly larvae; describes the injury and requests infor¬ 
mation concerning its extent and amount. 
749. Forbes, S. A. A new enemy to grasses. <Prairie Farmer, 14 
May, 1887. 
Injury to meadows and pastures, grass, and clover, in central Illinois, due 
to a tipulid larvae, with a request for observation and report from those 
who detect this injury on their farms. 
750. Forbes, S. A. Arsenical poisons for the codling moth ( Garpo■ 
capsapomonella Linn.). Record and discussion of experiments 
for 1885 and 1886. <Bull. No. 1, Office of State Entomologist 
Illinois, 1887. <Trans. Ill. State Hortic. Soc. for 1886,1887, 
new ser., v. 20, pp. 109-118. See: <Amer. Nat., May, 1887, v. 
21, p. 480. <Farmers ? Review, 4 May, 1887. <Trans. Wise. 
State Hortic. Soc., 1887, p. 103. <Trans. Maine State Pomol. 
Soc., 1886, p. 160. <Prairie Farmer, 30 April, 1887. 
Demonstration that at least 70 per cent of the loss occasioned by the codling 
moth may be prevented by the use of paris green in a spray with water. 
