42 EEPOET OF SEAKCH FOE ENEMIES OF CITEXJS WHITE FLY. 
The citrus white fly has other host plants than the varieties of 
citrus, and below is given a list of its definitely known food plants 
as taken from Bulletin 92 of this bureau, page 29: 
Definitely known food plants of the citrus white fly (Aleyrodes citri). 
Class I. Preferred. 
Introduced: 
1. Citrus (all species cultivated in America). 
2. China tree (Melia azedarach). 
3. Umbrella China tree (Melia azedarach umhraculifera) . 
4. Cape jessamine (Gardenia jasminoides) . 
5. Privets (Ligustrum spp.). 
6. Japan persimmon (Diospyros kaki) . 
7. Lilac (Syringa sp.). 
8. Coffee (Coffea arabica). 
Native: 
9. Prickly ash (Xanthoxylum clava-herculis) . 
10. Wild persimmon (Diospyros virginiand) . 
Class II. Occasionally Infested. 
Introduced : 
11. Aliamanda (Aliamanda neriif olid) . 
12. Cultivated pear (Pyrus spp.). 
13. Banana shrub (Magnolia fuscatum) . 
14. Pomegranate (Punica granatum) . 
Native : 
15. Smilax (Smilax sp.). 
16. Cherry laurel (Prunus laurocerasus) . 
17. Wild olive or devil wood (Osmanthus americanus) . 
18. Viburnum ( Viburnum nudum.) 
19. Green ash (Fraxinus lanceolata). 
The bulletin just referred to goes on to say that in addition to those 
of the foregoing list there are several species reported as food plants 
of the white fly which, although probably true food plants, can not 
consistently be included in the recognized list until the observations 
have been repeated and the infesting species positively identified. 
Authorities on the white-fly situation in this country appear 
agreed that the economic control of this insect necessitates proper 
attention to different food plants. It can then be seen that in case 
a citrus orchard was so treated that the fly was eradicated therefrom, 
the presence of other species of infested food plants in the immediate 
neighborhood which might escape treatment would furnish a direct 
source for its reinfestation. Knowledge of the different kinds of 
food plants would readily enable the horticulturist to determine 
before treatment whether or not his sole efforts could be devoted to 
his orchard trees. 
As the white fly is an introduced pest it has also been conceded 
that knowledge of the different preferred food plants might Lssist 
materially in the discovery of the original host plant as well as indi- 
rectly the original home of the insect. Practically all investigators 
