:;r, i-r.\(,i PARASITIC UPON ALEYRODES CITRI. 



out from the edge. This is the only growth that lias so far been observed 

 under artificial conditions. 



niSTKII'.r H<>.\ OF THE BROWN FUNGUS. 



Florida. Alva. Bartow, Buckingham, Bradentown, Fort Myers, Largo, 

 Leesburg, Manatee, Oneco, Orlando, Palmetto, St. Augustine and St.. 

 Petersburg, on Ale yr odes citri. 



Ceylon, as reported by J. Parkin, on various species of Aleyrodes. 



SUPPLEMENTARY NOTES. 



1. Since the above has been written, what appear to be the spores of 

 the Brown fungus of Aleyrodes citri have been discovered. These spores 

 are germinating in hanging drop cultures of sugar solutions, and are pro- 

 ducing hyphae that seem to be identical with those of the Brown fungus. 

 Further studv is needed to prove the relationship of these spores to the 

 Brown fungus. 



V. A species of Sporotrichuin has been discovered upon the adult and 

 larva of Aleyrodes citri. This fungus seems to be responsible, during damp 

 weather, for the premature death of great numbers of adults. Cultures and 

 inoculation experiments are being carried on, the results of which will be 

 published later. 



3. Since the writing of this thesis it has been shown by Dr. E. W. Berger, 

 Entomologist of the Florida Experiment Station, that the insects hitherto 

 designated as Ale\rodes citri comprise two distinct species of Aleyrodes; 

 one with smooth eggs and clear wings, and the other with rough eggs 

 covered with a delicate net of five- and six-sided meshes, and wings with 

 a smoky-colored area at the end of each fore wing. Specific differences 

 have also been observed in the first and fourth stage larvae. (See Press. 

 Bulletin t)T, Fla. Agri. E\p. Sta., and Proc. Fla.'Sta. Ho'rt. Soc., p. 86, 1908.) 

 Dr. Berger's observations and also those of the writer seem to show that 

 these two species of Aleyrodes are differently attacked by the Aschersonias 

 (A. oleyrodis and ./. flavo-citrina}, and also by the Brown fungus and 

 Microccra sp. Aschersonia flaz'O-citrina attacks readily onlv the smoky- 

 winged Aleyrodes. but will attack the clear-winged species. Aschersonia 

 ulcyrodis and the Brown fungus attack both species of Aleyrodes in an equal 

 degree, but the greater number of the specimens so far observed have been 

 found upon the clear-winded species. The Microceni has been found on 

 both species of Aleyrodes, although it is more effective upon the smoky- 

 winged .species. The infection experiments described in the foregoing pages 

 with cultures of Microccni sp. (page :;>) and / V/7/V/7/////// hetcrochuinm 

 (pag &4) were made up. .11 the clear-winged species. The infection ex- 

 periments also made by E. \Y. Berger at St. Petersburg and ('.ainesville-- 

 i page 1'i) weft aNo upon the clear-winged Aleyrodes. 



October 1, 1908. 



