A NEW GENUS OF ALEYRODID.E. 173 



coalescence into two joints of the ringed segments 3 to 7. In the 

 fore Aving there is a single vein, as in Aleyrodes (fig. 36, 5), with a 

 rudimentary branch or fold near basal fifth and a very obscure rudi- 

 mentary vein at very base of wing. Hind wings with but a single 

 vein. Genitalia in male forcipate, penis bifurcate (fig. 36, c). Claws 

 long and slender, with central spinous process (fig. 36, d). In female, 

 length of body, 0.8 to 0.9 mm. ; length of fore wing, 0.8 to 0.9 mm. ; 

 width of fore wing 0.3 to 0.38 mm. ; length of antenna, 0.38 to 0.45 

 mm.; length of hind tibia, 0.25 to 0.3 mm. Male proportionately 

 smaller. 



Food plants. — Orange, Persea caroUnensis^ persimmon (?), avo- 

 cado pear. On orange this insect infests the older leaves, rarely or 

 never occurring on the new growth as is the case with Aleyrodes citri. 



Doctor Howard has given to the parasite of this species, reared 

 by Doctor Morrill, the manuscript name Encarsia variegatus. 



Bemarks on ALEYRODES NUBIFERA Berg-er, and ALEYRODES CITRI 



Riley and Howard. 



The recent interesting discovery by Dr. E. W. Berger, entomolo- 

 gist of the Florida Agricultural Experiment Station, that the so- 

 called orange white fly {Aleyrodes citri) of Florida represents two 

 distinct though closely related species, led the writer to go carefully 

 over the material in the Bureau of Entomology collection in order to 

 determine to what extent the new species Aleyrodes nuhifera Berger 

 might i^ossibly be found. The results have been interesting, and, as 

 showing the distribution of the new species, are worth recording. 

 Specimens of nuhifera are in the collection from the following 

 localities : 



Pass Christian, Miss., August 23, 1889, on orange. 



Raleigh, N. C, September 25, 1889, on orange. 



Raleigh, N. C, October 7, 1889, on orange. 



Xew Orleans, La., March 10, 1890, on orange. 



Baton Rouge, La., February 23, 1895, on orange. 



Crescent City, Fla., January, 1895, on gardenia. 



Crescent City, Fla., January 30, 1895, host not indicated. 



Crescent City, Fla., February 24, 1895, on orange. 



Crescent City, Fla., March 1, 1895, on orange. 



Santiago de las Vegas, Cuba, March 7, 1905, on orange. 



Santiago de las Vegas, Cuba, May 6, 1905, on orange and other 

 citrus fruits. 



Santiago de las Vegas, Cuba, June 6, 1905, on tangerine orange. 



Waco, Fla., October 21, 1908, on orange. 



Florida (locality not given), November 23, 1908, on orange. 



Florida (locality not given), January 18, 1909, on orange. 



