ALEYRODIDAE, OR WHITE FLIES ATTACKING THE 

 OIL\NGE, WITH DESCRIPTIONS OF THREE NEW 

 SPECIES OF ECONOMIC IMPORTANCE 



By A. L. QuAiNTANCE, Entomologist in Charge of Deciduous Fruit Insect Investiga- 

 tiotis, and A. C. Baker, Entomological Assistant, Bureau of Entomology 



Thirteen species of so-called white flies are recorded in literature as 

 infesting Citrus plants in different parts of the world. Eight of these 

 are present in Florida, four of them being native to the United States 

 and four having been introduced. The native forms have thus far been 

 of little economic importance, whereas two of the introduced species 

 are first-class Citrus pests. The remaining two introduced forms, 

 although recently established on the orange {Citrus aurantiaca), have 

 already attracted attention by reason of their injuries. Our knowledge 

 of the remaining five species of Citrus white flies, while meager, indicates 

 that these, in their range of distribution, are abundant and destruc- 

 tive and would in all probability prove to be very undesirable immi- 

 grants. The new forms treated herein must be classed in the same 

 category, especially Aleurocanthus woglumi, which, although previously 

 named, is here technically described for the first time. This last species, 

 of oriental origin, has already found its way to Jamaica and the Bahamas, 

 where it infests the orange to a serious extent. 



The present paper brings together the essential information concern- 

 ing the distribution and food plants of the white flies which attack Citrus 

 plants and describes three new species of economic importance. 



Aleurocanthus citricolus (Newstead) 



Aleurodes citricola Newst., 1911, in Mitt. Zool. Mus. Berlin, Bd. 5, Heft 2, p. 173.' 



This species is known only from the original description. It was 

 taken at Dar es Salaam, German East Africa, on Citrus sp. in 1902. 

 The immature stages occurred in large, overcrowded colonies, appearing 

 to the unaided eye as patches of a sootlike deposit on the lower surface 

 of the leaves. This is one of the spiny forms and bears a general resem- 

 blance to A. woglumi (fig. 2, A-J, Pi. LXIV, LXV). 



Aleurocanthus citriperdus, n. sp. 



This insect (fig. i) was taken by "Mr. R. S. Woglum, of the Bureau of 

 Entomology, in several localities in the Orient, as follows: Royal Bo- 

 tanic Gardens, Ceylon, on an unknown tree, October, 19 10; Lahore, 

 India, on Citrus sp., July, 191 1; Buitenzorg, Java, on orange, January, 

 191 1 ; Sandan Glaya, Java, on Citrus sp., January, 191 1. It is reported 



' All bibliographic citations in synonymy are civcn in full in "Literature cited," pp. 471-472. 



Journal of Agricultural Research, Vol. VI, No. 12 



Dept. of Agriculture, Washington, D. C. June 19, 1916 



el K-37 



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