BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
11 
91. Beckwith, M. H. London purple for the codling moth. <Bull. 
No. 8 , Del. Agric. Exp. Sta., March, 1890, pp. 15-16. 
Experiments in application. 
92. Beckwith, M. H. Injurious insects. <Trans. Penin. Hortic. Soc., 
1891, pp. 47-52. 
Treats of fruit and garden pests. 
93. Beckwith, M. H. Report of the entomologist. <Fourth Ann. 
Rept. Del. Agric. Exp. Sta., 1891, pp. 89-100, tigs. 14-17. 
Notes on some common insects. 
94. Beckwith, M. H. Injurious insects and insecticides 5 spraying 
machines. <Bull. No. 12, Del. Agric. Exp. Sta., March, 1891, 
pp. 28, tigs. 11. Also in Third Ann. Rept., 1890. 
Aphis persicce-niger and a few common insects. 
95. Beckwith, M. H. Practical notes on the use of insecticides. <In- 
sect Life, v. 3, March, 1891, pp. 269-275. 
96. Beckwith, M. H. The peach tree aphis. <Farm and Home, 1 
July, 1891. 
97. Beckwith, M. H. Notes on a corn Crambid. <Insect Life, v. 4, 
October, 1891, p. 42. <Twenty-second Ann. Rept. Ent. Soc. 
Out., 1891, p. 64. 
Notes on Crambus caliginosellus. 
98. Beckwith, M. H. Notes on a corn Crambid. <Bull. No. 14, Del. 
Agric. Exp. Sta., December, 1891, pp. 13-15, 1 Jig. Also in 
Fourth Ann. Rept., 1891. 
Description and depredations of Crambus caliginosellus. 
99. Beckwith, M. H. Report of committee on injurious insects. 
<Trans. Penin. Hortic. Soc., 1892, pp. 62-68. 
Notes on Phytoptus pyri and Heliothis armiger. 
100. Beckwith, M. H. Report of the entomologist. <Fifth Ann. 
Rept. Del. Agric. Exp. Sta., 1892, pp. 102-109. 
Sphenophorus sculptilis, Anthonomus signatus , fungus disease on white grubs. 
101. Beckwith, M. II. The strawberry weevil. <Bull. No. 18, Del. 
Agric. Exp. Sta., September, 1892, pp. 11-16, figs. 2. Extract; 
Ent. News., 1892, pp. 262-263. 
Anthonomus musculus, description aud remedies. 
102. Beckwith, M. H. Injurious insects. <Trans. Penin. Hortic. 
Soc., 1893, pp. 39-43. 
Brief notes, mostly on grain insects. 
103. Beckwith, M. H. Insects injurious to stored grain. <Bull. No. 
21, Del. Agric. Exp. Sta., September, 1893, pp. 12, tigs. 7. 
General account of granary insects. 
104. Beckwith, M. H. Injurious insects. <Trans. Penin. Hortic. Soc., 
1894, pp. 53-57. 
Brief notes, mostly on fruit insects. 
105. Beckwith, M. H. The San Jos 6 scale insect in Delaware. <Bull. 
No. 25, Del. Agric. Exp. Sta., May, 1895, pp. 8 , tigs. 4. 
General account of insect. 
