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505. Duffey, J. C. Transformations of a Carabid ( Plochionus timidus) 
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<Trans. St. Louis Acad. Sci., v. 5, No. 3, pp. 533-542, 2 pis. 
<Abstract in Insect Life, v. 3, p. 422. 
rioclnonus timidus eating Hypliantria larvfe, and Scymnus punctum eating red 
spider. 
50G. Duffey, J. C. Insecticides and fungicides. <Ann. ltept. State 
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507. Duges, A. [A spider-bite contribution.] <Insect Life, v. 2, 
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508. Duggar, B. M. A bacterial disease of the squash-bug. <Amer. 
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Abstract of paper read before Botan. Soc. Amer. 
509. Dunn, G. W. [Death due to whip scorpion and tarantula.] 
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510. Dunning, D. W. Concerning the cabbage maggot. <Pop. Gar¬ 
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Use quicklime in liquid manure. 
511. Dwight-Sanderson, E. Economic entomology. <Tlie Florida 
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General remarks on the ravages of insects. 
512. E[-], S. W. The cucumber beetle on the potato crop. <Prai- 
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Recommends pyretkrum; also dry-slacked lime. 
513. Earle, J. J. Notes on insecticides. <Bull. No. Id, Fla. Agile. 
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Analysis and effect of certain insecticides. 
514. Eaton, A. A. [On irrigation and its effects on insects.] <Insect 
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515. Edwards, H. Bibliographical catalogue of the described trans¬ 
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510. Eisen, G. The introduction of Blastophagapsenes into California. 
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517. Eisen, G. The first introduction of Blastophagapsenes into Cali¬ 
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518. Eisen, G. Biological studies on figs, caprifigs, and caprification. 
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519. Evans, W. M. Chinch bugs have about finished the wheat. 
<Amer. Agric., 4 July, 1890, p. 4. 
Methods by which a planter destroyed them. 
529. Farmer, L. J. The larva of the May beetle. Its effect on small 
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