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437. BUREAU OF ENTOMOLOGY ill© PLANT QUARANTINE 
1935. A partial report of the section of extension of the American 
Association of Economic Entomologists Meeting in Pitts- 
burgh, Pa., on December 27, 1934. Informal discussion of 
field results v&th arsenical substitutes in the control of 
vegetable insects. U. S. Dept. Agr., Bur. Ent. and Plant 
Quar., 19 pp. [Processed.] 
438. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1935. Results of codling moth investigations, 1934. I. Work 
conducted by state agencies. U. S. Dept. Agr,, Bur. 
Ent. and Plant Quar., 59 pp. [Processed.] 
439. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1935. Results of codling moth investigations, 1934. II. Work 
conducted by Fruit Insects Division. U. S. Dept. Agr., 
Bur. Ent. and Plant Quar., 44 pp. [Processed.] 
440. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1935. Results of codling moth investigations, 1934.. IV. General 
summary and discussion. U. S. Dept. Agr., Bur. Ent. and 
Plant Quar., 5 pp. [Processed.] 
441. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1935. [Cracca.] U. S. Dept. Agr,, Bur. Ent. and Plant Quar. Ann. 
Rpt. 1935: 14, 45-46, 61-62. 
442. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1936. [Derris and cube.] U. S. Dept, Agr,, Bur. Ent. and Plant 
Quar. Ann. Rpt. 1936: 58-59, 61, 67, 76,. 87. 
443. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1937. [Derris.] U. S. Dept. Agr., Bur. Ent. and Plant Quar. Ann. 
Rpt. 1937, 98 pp. 
444. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1938. Tests on insecticidal value of certain compounds, U. S, 
Dept. Agr., Bur. Ent. and Plant Quar., Div. Control Invs. 
Rpt. No, 2, 56 pp. [Processed,] 
445. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1938. Tests on insecticidal value of certain compounds. U. S, 
Dept. Agr., Bur. Ent. and Plant Quar., Div. Control Invs, 
Rpt. No, 3, 41 pp. [Processed,] 
446. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1938. [Derris.] U. S. Dept. Agr., Bur. Ent. and Plant Quar. Ann, 
Rpt. 1938, 84 pp. 
447. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
1939. Results of codling moth investigations, 1938. II. Work 
conducted by the Bureau of Entomology and Plant Quaran- 
tine, U. S. Dept. Agr., 48 pp. [Processed.] 
