306 THE MONTHLY BULLETIN. 



2. Cloudy-winged whitefly, Dialeurodes citrifolii (Morgan). Formerly Alegrodes 

 nubifera Berger. Regarded as being of Oriental origin. Occurs in Cuba and Mexico. 

 Known from North Carolina (1SS9), Florida (1S95). Mississippi (1SS9). Louisiana 

 (1890), California (1907). and Texas. The writer found it in Brownsville. Texas, 

 in 1914. The California infestation was at Bakersfield and is said to have been 

 eradicated. In Florida it is largely confined to a belt surrounding Tampa Bay, 

 which belt extends northeastward to the Atlantic Ocean, and then southward in a 

 narrower belt along the east coast, including north Dade County. It also occurs 

 at Key West. It has been found to infest only citrus, and Ficus nitida at Audubon 

 Park, New Orleans, La. An important pest, but not considered as noxious as the 

 common whitefly. 



3. Woolly whitefly, Aleurothrixus howardi (Quaintance) . Formerly Aleyrodes 

 howardi. Probably of West Indian, Mexican or South American origin. It occurs 

 in Cuba, Isle of Pines, Porto Rico, Jamaica, other West Indies, Mexico, British 

 Guiana, Brazil, Argentina, Canal Zone, Chile and Paraguay. Apparently first found 

 in Florida in 1890, on the sea-grape, at Miami, by Prof. P. H. Rolfs, but it has 

 never infested citrus at that place. 3 It was first observed on citrus in Florida at 

 Tampa, by Dr. E. A. Back, in 1909. Since then it has spread rapidly to many parts 

 of the state. It has apparently the same food plants as A. floccosus (see next 

 paragraph). It is a serious pest, and were it not for a minute hymenopterous 

 parasite, Erctmocnrus haldcmani, which brings it under control during the summer 

 and fall, it would be difficult to control. 



4. Aleurothrixus floccosus (Maskell). Probably of West Indian. Mexican, or 

 South American origin. Found on citrus, sea-grape (Coeeoloba uiifcra), Plumeria 

 sp., Baccharis genistelloides, lignumvitw, guava, a coarse grass, and a climbing vine. 

 Probably at times a serious pest. It has the same distribution as A. howardi (see 

 previous paragraph). Occurs in Florida. 



SPECIES NATIVE TO UNITED STATES. 



1. Bay tree whitefly, Paraleyrodes pcrsew (Quaintance). Reported only from 

 Florida. Feeds on Persea, avocado, citrus and persimmon. Rarely common on 

 citrus. Not a pest. 



2. Florida whitefly, Trialeurodes floridensis (Quaintance). Reported only from 

 Florida. Feeds on avocado, guava. annona squamosa, and citrus. Not a pest, 

 except at times on avocado and guava. 



3. Trialeurodes vitrinellus (Cockerell). Reported from Mexico on orange, and 

 southern California on oak. Probably not a serious pest. Not known in Florida. 



4. Mulberry whitefly, Tetraleurodes mori (Quaintance). Widely distributed over 

 eastern United States, including Florida. Feeds on a large variety of plants, 

 including mulberry, sycamore, maple, dogwood, hackberry, persimmon, holly, moun- 

 tain laurel, etc. Found several times on orange. Not known to be a pest. 



5. Mulberry whitefly, Tetraleurodes mori, var. arizonensis (Cockerell). Reported 

 from Arizona and Mexico, but regarded by Quaintance as only a race of T. mori 

 which has taken to breeding on orange. A pest of some importance in Mexico. Not 

 in Florida. 



SPECIES NOT IN UNITED STATES. 



1. Aleurocanthus citricolus (Newstead). Reported only from German East Africa 

 on Citrus sp. Probably capable of becoming a serious pest. 



2. Aleurocanthus citriperdus (Quaintance and Baker). Taken by R. S. Woglum in 

 Ceylon on an unknown tree, in India on Citrus sp., and Java on orange and Citrus 

 sp. Regarded of considerable economic importance. 



3. Spiny citrus whitefly, Aleurocanthus woglumi Ashby. Found in India. Ceylon, 

 and Philippine Islands. Recently discovered in Jamaica, Cuba and New Province, 

 Bahamas. Found infesting orange, grapefruit, Citrus sp., mango, avocado, guava, 

 Capparis roxlurghi, C. pedunculosis, Mortis sp., Salacia reticulata, Kurrimia zey- 

 lanica, Guiacum officinale, Oestrum nocturnum L., and an unknown tree. A very 

 injurious pest. 



4. Aleurocanthus spiniferus (Quain.). Found on Citrus sp. and rose in Java, 

 and on orange in south China. Not indicated if a pest. 



5. Aleurolohus marlatti (Quain.) Found in Japan on orange, in India on Citrus 

 sp, and Morus sp., in Ceylon on Ficus sp., and on an unknown tree in Java. Not 

 indicated if a pest. 



3 After the manuscript for this paper had gone to press specimens of Aleurothrixus 

 howardi were taken on citrus at Miami, Florida. E. W. B. 



