338 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 8 



We are indebted to Dr. R. C. L. Perkins of the Hawaii Sugar Plant- 

 ers' Association Experiment Station for the identification of the pre- 

 daceous and parasitic insects. 



BlBLIOGRAPHY 



1 Mally, C. W., 1904. The Fruit-Fly {Ceratitis capitata Wied.). Repr. Agric. 

 Jour., Dec, No. 28, Cape of Good Hope, pp. 1-18. 



2 Mally, C. W., 1908. The Fruit-Fly. Paraffin Remedy versus Poisoned Bait. 

 Ibid, No. 18, pp. 1-5. 



3 Mally, C. W., 1909. Poisoned Bait for Fruit-Fly. Ibid, No. 14, pp. 1-15. 



4 Mally, C. W., 1909. The Mally Fruit-Fly Remedy. Ibid, No. 49, pp. 1-6. 



5 Severin, H. H. p. and Hartung, W. J., 1912. ■ The Flight of Two Thousand 

 Marked Male Mediterranean Fruit-Flies {Ceratitis capitata Wied.). Annals of the 

 Entomological Society of America V, No. 4, pp. 400-7. 



^ Weinland, H. a., 1912. The Present Fruit-Fly Situation and some Results of 

 the Hawaiian Campaign. CaUfornia State Commission of Horticultm^e Monthly 

 Bulletin I, No. 1, pp. 845-852. ' . " 



Explanation of Plate 14 



Fig. 1. The two bottles on the right contain 10,239 Mediterranean fruit flies; these 

 were captured in ten kerosene traps during five weeks before spraying. The bottle 

 on the left contains 182 fruit flies and these were captured in ten kerosene traps 

 wired to the same trees during and after spraying in the following five weeks. 



Fig. 2. Leaf showing small droplets of spray. In this instance the solution was not 

 kept thoroughly agitated and consequently the last few pump-fulls of the poisoned 

 bait contained a large amount of the lead arsenate. The droplets of spray show 

 a white deposit of lead arsenate covered with a glossy sugar layer; the latter is 

 represented in black in the photograph. 



[Last of the papers read by title. — Ed.] 



A CONTRIBUTION TO THE LIFE HISTORY OF THE CORN- 

 FEEDING SYRPHUS FLY (MESOGRAMMA POLITA SAY) 



By C. H. Richardson, New Jersey Agricultural Experiment Station 



During the summer of 1913, the writer observed an infestation of 

 Mesogramma polita which extended over a considerable portion of two 

 hundred acres of sweet corn at Jobstown, Burhngton County, N. J. 

 The prosecution of other field work made it impossible to study the 

 activities of this Syrphid in detail at that time. However, observa- 

 tions were made at frequent intervals and the results are given here 

 as an addition to our present knowledge and a stimulus to further 

 interest in this species. 



References to the habits of Mesogramma polita are few. Riley and 

 Howard,^ who have given the most complete account of its life history, 



1 Insect Life, Vol. 1, 1888, pp. 5-8. 



