JOURNAL 



OF THE 



ASIATIC SOCIETY OF BENGAL, 



Vol. LXXII. Part II. — NATURAL SCIENCE. 



No. 3.— 1903 



Contributions toward a Monograph of the Oriental Aleurodidae. — Part J.— 

 By H. W. Peal, F.E.S. 



[Received 28th January, 1903. Read 4th February, 1903.] 



CHAPTER I. 



Introductory. 



The Aleurodidae are a family of the Homoptera which are allied to the 

 well-known Coccidae or Scale Insects. Owing to their similarity to this 

 family they are usually mistaken for such by Agriculturists and such 

 mistakes can easily be excused owing to this family being so little known. 



The Aleurodidae, like all the bugs, are sucking insects and derive 

 their nourishment from plants by pumping up the sap by means of a pro- 

 boscis formed of three fine setae. In the Coccidae the winged males (the 

 females are un winged) are destitute of mouth parts, but in the Aleurodidw 

 the males and females both possess wings and the mouth parts and diges- 

 tive organs are present. It is however in the immature and stationary- 

 stages that the greatest damage is done by these insects. In a country 

 like India where there is practically a perpetual summer, these insects 

 are present in great abundance and they are more destructive than in 

 colder climates» This is due to there being a continuous succession of 

 J. ii. 10 



