CHRYSANTHEMUM MIDGE. 23 



experiment station or to the Bureau of Entomology, United 

 States Department of Agriculture. 



The California Experiment Station (18) recommends the practice 

 of growing the bulk of the chrysanthemum crop under cloth as a satis- 

 factory means of preventing the attack of the gall-fly. 



As a further preventive measure, it is recommended that cuttings 

 be dipped in the following solution at the time they are taken : 



Nicotine sulphate, 40 per cent part. . 1 



Water parts. . 800 



Laundry soap ounce per gallon. . -I— 1 



Another satisfactory method of securing chrysanthemum cuttings 

 free from the midge when the previous season's stock has been infested 

 is to plant the stocks in benches or cold frames directly after the 

 season's crop has been removed. This should then be followed by 

 thorough treatment with a mixture consisting of equal parts of dry 

 or air-slaked lime and tobacco dust. It is advisable to keep all new 

 growth covered with the mixture until further operations in the 

 spring. 



LITERATURE CITED. 



(1) Perris, E. 



1870. Histoire des insectes du pin maritime. (Dipteres). In Ann. Soc. Ent. 

 Fr., v. 10, p. 135-232. 



Page 177: States that he observed ceeidomyiid larvae in a gall formed by the union 

 of the leaves of the central shoot of the terminal rosette of Leucanthemum vulgarc. 



(2) Von Bergenstamm, J. E., and Low, P. 



1876. Synopsis Cecidomyidarum. In Verh. zool.-bot. Gesell. in Wien, v. 26, 

 p. 90, no. 516. 

 Identical with (1). Reference taken from E. Perris. 



(3) Low, F. 



1885. Beitrage zur Naturgeschichte der Gallenerzeugenden Gecidomyiden. 

 In Verh. zool.-bot. Gesell. in Wien, v. 35, p. 483-510. 

 Pages 488-489: Original description of male, larva, egg, pupa, and gall. 



(4) RtJBSAAMEN, E. H. 



1892. Die Gallmiicken des koniglichen Museums fur Naturkunde zu Berlin. 

 In Berl. Ent. Zeitschr., v. 37, p. 319-412. 



Page 375: Records synonymy and gives list of 19 species. Among them appears 

 (as No. 7) Cecidomyi'a hypogaea Fr. Low, as mentioned by him in reference (3). 



(5) KlEFPER, J. -J. 



1897. Synopse des Cecidomyies d'Europe et d'Algerie. In Bull. Soc. d'Hist. 

 Nat. de Metz, Cah. 20, 2nd ser., v. 8, p. 1-64. 



Page 21: Mentions occurrence of subterranean galls on C. atratum and C. leucan- 

 themum. 



(6) 



1897. Rectifications synonymiques. In Bui. Soc. Ent. Fr., 1897, no. 16, p. 

 261, par. 6. 



(7) 



1900. Monographie des Cecidomyides d'Europe et d'Algerie. In Ann. Soc. 

 Ent. Fr., v. 69, p. 180-472. 



Pages 351 and 353: Mentions injury to chrysanthemums caused byRhopalomyia hypo- 

 gaea F. Low. 



