182 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
2819. Roe, M. V. The codlin moth. <Pacific Rural Press, 19 April, 
1890, p. 403. 
2820. Rogers, E. A. Woolly aphis. <Rept. Calif. State. Bd. Hortic. 
for 1890 (1890), p.58. 
2821. Rolfs, P. H. The horn fly. <Bull. No. 17, Ela. Exp. Sta., 1892, 
jip. 12-14. 
Short account, with remedies. 
2822. Rolfs, P. H. Enemies of the tomato. <Bull. No. 21, Fla. Agric. 
Exp. Sta., October, 1893, pp. 19-25. 
Treats of hollworm, Phytoptus, and nematodes. 
2823. Rolfs, P. H. Insecticides and fungicides. <Bull. No. 23., Fla. 
Agric. Exp. Sta., December, 1893, pp. 36. 
Preparation and application of various insecticides. 
*2824. Rolfs, P. H. Some economic insects. <Proc. 6th Ann. Meet. 
Ela. State Hortic. Soc., 1893, pp. 137-152,12 figs. 
General remarks. 
2825. Rolfs, P. H. Injurious insects. <Proc. 7th Ann. Meet. Ela. 
State Hortic. Soc., 1894, pp. 94-99. 
Notes on Pollinia costcv, gypsy moth, fluted scale, San Jose scale. 
2826. Rolfs, P. H. The San Jose scale. <Bull. No. 29, Fla. Agric. 
Exp. Sta., August, 1895, pp. 93-111, 2 pis. 
General article on the insect. 
2827. Rolfs, P. H. Bisulphide of carbon as an insecticide. <The 
Florida Farmer and Fruit Grower, 23 November, 1895, p. 740. 
2828. Rolfs, P. H. Some unexpected results of spraying peaches. 
<Proc. 16th Ann. Meet. Soe. Prom. Agric. Sci., 1895, pp. 40-41. 
2829. Rudd, W. N. To kill grubs and seeds in greenhouse. <Garden 
and Forest, 1893, p. 427. 
2830. Salmon, D. E. Ticks and Texas fever. < Farmers’ Review, 2 
September, 1892, p. 598. 
2831. Sanders, W. A. [Eucalyptus vs. mosquitoes.] <Insect Life, v. 
5, July, 1893, pp. 344-345. 
2832. Sargent, G. I. Bulletin No. 8. < Third Biennial Rept. Oreg. 
State Bd. Hortic., 1895, pp. 119-146. 
Contains remedies for various insects. 
2833. Sayre, L. E. Insects injurious to drugs. <Amer. Jour. Phar¬ 
macy, 1 July, 1893, pp. 321-329, 2 pis. <Sci. Amer. Suppl., 19 
August, 1893, pp. 14704-14705, 2 pis. 
Treats of various insects in drugs; notably Silvanus surinamensis, Nicolnum 
Mrium, Anthrenus varlm, Ptinus brunneus, Lasioderma serricorne, etc. 
2834. Schaufuss, C. F. On the introduction of the European bark- 
beetle destroyer (Clerus formicarius L.) to America. < Science, 
4 November, 1892, p. 256. 
In German. 
