THE SUGAE-BEET THEIPS. 11 



The spray should be appUed to both sides of the leaves ; if possible, 

 on a dull or cloudy day. The adults are not so active at this time 

 and are, therefore, less likely to move out of reach of the spray. 



BIBLIOGRAPHY. 



(1) Reuter, O. M. 



1891. Thysanoptera, funna i finska orangerier. In Meddel. af Societatis pro 

 Fauna et Flora Fennica, v. 17, p. 161-167. 

 Original description of the female as Hcliothrips femoralis n. sp., p. 166. 



(2) Pergande, Theo. 



1895. Observations on certain Thiipidse. In U. S. Dept. Agr. Div. Ent. 

 Insect Life, v. 7, no. 5, p. 390-395, July. 

 Description of the female as Helioihrips cestri n. sp., and notes of its habits, with food plants, 

 p. 391. 



(3) Uzel, Heinrich. 



1895. MonograpMe der Ordnung Thysanoptera. Koniggratz, 427 p. 10 pi. 

 Description. 



(4) Bergroth, E. 



1896. Nouvelle espece de Thysanoptcres. In Ann. Soc. Ent. Belg., v. 40, 



p. 66-67. 

 Description, p. 67. 



(5) Reuter, O. M. 



1899. Thysanoptera fennica. Forteckning och beskrifniiig ofver finska 

 Thysanoptera. In Acta Soc. pro Fauna et Flora Fennica, v. 17, no. 

 2. 67[2] p. illus. 

 Description and list of food plants, p. 39. 



(6) Hinds, W. E. 



1902. Contribution to a monograph of the insects of the order Thysanoptera 

 inhabiting North America. In Proc. U. S. Nat. Mus., v. 26, p. 79-242. 

 11 pi. 

 Descrii,tion of female, with list of its food plants, p. 172-173, PI. V, figs. 55, 56, PI. VI, fig. 57. 



(7) Chittenden, F. H. 



1902. Thrips injurious in greenhouses. In Weekly Florists' Review, v. 9, p. 

 738-740, 2 figs. April 17. 

 General description of Heliothrips cestri, a list of food plants, and methods of control. 



(8) BuFFA, Pietro. 



1907. Trentana specie ditisanotteriitaliani. Pisa. 77 [2] p. 2 pi. Separate 



from Atti Soc. Tosc. Sci. Nat. Mem. 23, p. 226-303. 2 pi. 

 Description, p. 63. 



(9) Bagnall, R. S. 



1908. Notes on some genera and species of Thysanoptera new to the British 



fauna. In Ent. Mo. Mag. ser. 2, v. 19 (whole ser. v. 44), no. 1, p. 3-9. 

 Jan. 

 Records its occurrence in orchid houses at Wylam-on-Thyme, Northumlierland. (Footnote) 

 Note on its occurrence in Antwerp and Brussels in large numbers, p. 6, 7 (footnote). 

 (10) BUFPA, PlETRO. 



1908. Contribuzionc alia conoscenza doi Tisanotteri italiani. In Redia, v. 5, 



p. 13:i-137. 

 Kecord of occurrence in Italy, p. 135. 

 (U) Bao.vall, R. S. 



1909. A contribution 1 o our knowledge of the British Thysanoptera (Tere- 



hrantia), with notes on injurious species. In Jour. Econ. Biol., v. 4, 

 no. 2, p. 33-41. July 7. 

 Not uncommon In a hothouse on a iiirge variety of [jjauts, Kew (lardous and Now Castle, 

 p. 39. 



