62 



4. Aleurodes vaporarium (?), Garman, Ann. Rept. Ky. Expr. Sta. r 



. p. 37 (1890). 



5. Aleurodes vaporarium (?), Garman, Agric. Science, vol. v, p. 



264 (1S91). 



6. Aleyrodes sp. (?), Riley, Insect Life, vol. v, p. 17 (1892). 



7. Aleurodes sp. (?), Webster, Ann. Rept. Ohio Expr. Sta., p. 



35 (1894). 



8. Aleyrodes vaporariorum, Britton, 19th Rept. Conn. Expr. Sta., 



p. 203 (1896). 



9. Aleyrodes sp. (?), Slingerland, Bui. 19, Cornell Expr. Sta., p. 



^S-^S (i9 01 )- 



10. Aleyrodes vaporariorum (?), Britton, Bui. 140 Conn. Expr. Sta., 



P. 3, IO > !4, 17 ( 1 9° 2 )- 



11. Aleyrodes packardi, Morrill, Can. Ent., vol. xxxv, p. 25-35 



09°3)- 



12. Aleyrodes vaporariorum (?), Britton, 2nd Rept. Conn. State 



Ent., p. 149, 156, 160, 162 (1903). 

 it,. Aleyrodes packardi, Morrjll, Psyche, vol. x, p. 80,81,83 ( I 9°3)- 



SUMMARY. 



Of the sixty-five known American species of the genus Aleyrodes, 

 the two herein treated, the greenhouse Aleyrodes (A. vaporariorum) 

 and the strawberry Aleyrodes {A. packardi), together with the orange 

 Aleyrodes (A. citri), are the only ones that have thus far proved of 

 much economic importance. The orange Aleyrodes occurs only in 

 greenhouses on citrous plants in northern climates, and at present is 

 of no importance in this state. 



The common names of the insects of this genus are : Aleyrodes, 

 white fly, mealy wing and snowy fly. 



The family Aleyrodidas, to which the genus Aleyrodes belongs, 

 occupies a systematic position between the plant lice and the scale 

 insects, and appears to be more closely related to the latter. 



