46 
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609. Forbes, S. A. A summary history of the corn-root aphis. 
<Insect Life, v. 3, January, 1891, pp. 233-238. 
610. Forbes, S. A. On the life-liistory of the white grubs. <Insect 
Life, v. 3, January, 1891, pp. 239-245. 
611. Forbes, S. A. The fruit bark-beetle ( Scolyitis nujulosus Ratz). 
<Bull. No. 15, Ill. Agric. Exp. Sta., February, 1891, pp. 470-478. 
Historical accounts, damage, description, life-history, and remedies. 
612. Forbes, S. A. Fruit bark-beetle. <Fruit Growers’ Journal, 
1 May, 1891. 
613. Forbes, S. A. On a bacterial insect disease. <The 1ST. Amer. 
Practitioner, September, 1891. 
614. Forbes, S. A. On a bacterial insect disease. <Prairie Farmer, 
31 October, 1891, p. 700. 
615. Forbes, S. A. The introduction of a Hessian-fly parasite from 
Europe. <Insect Life, v. 4, December, 1891, pp. 179-181. 
Report on attempt at colonization of Semiotellus nigripes. 
616. Forbes, S. A. On a bacterial insect disease. <Am. Month. Mic. 
Journ., 1891, p. 246. 
617. Forbes, S. A. The fruit-destroying insects of southern Illinois. 
<Trans. Ill. State Hortic. Soc., 1891, pp. 116-123. 
618. Forbes, S. A. Seventeenth report of the State entomologist on 
the noxious and beneficial insects of the State of Illinois. 
<Trans. Dept. Agric., State of Ill., 1891. Separate: Spring- 
field, Ill., 1891, pp. 90, 7 pis. 
Articles on the fruit-tree bark-beetle, experiments with arsenites for the 
curculio, the common white grubs, Hessian fly, corn-root aphis, and diseases 
of the chinch bug. 
619. Forbes, S. A. The chinch bug in Illinois in 1891-92. <Bull. No. 
19, Ill. Agric. Exp. Sta., February, 1892, pp. 44-48. <Abstract 
in Insect Life, v. 5, p. 59. 
620. Forbes, S. A. Address of first vice-president. <Insect Life, v. 5, 
November, 1892, pp. 68-76. 
At Fourth Ann. Meeting Ass. of Econ. Entom.; contains notices on contagions 
diseases of insects, insecticides, importation of beneficial insects. 
621. Forbes, S. A. Injuries to fruit by twenty-five worst fruit insects. 
<Trans. Ill. State Hortic. Soc., 1892, pp. 121-134. 
622. Forbes, S. A. Bacteria normal to digestive organs of Hemiptera 
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623. Forbes, S. A. A programme of practice m horticultural entom¬ 
ology. <Traus. Ill. State Hortic. Soc., 1893, pp. 113-118. 
Spraying calendar. 
624. Forbes, S. A. The chinch bug in southern Illinois, 1894. <Bull. 
No. 33, Ill. Agric. Exp. Sta., June, 1894, pp. 397-399. 
625. Forbes, S. A. Chinch-bug experiment. <Special Bull. Ill. Agric. 
Exp. Sta., 30 June, 1894. 
