Baker & Moles.— thb albyrodid^-: of south ambrica 613 



since beeu added to the Aleyrodid literature, some 

 systematic, others economic and altogether too few on 

 niology and life histories. Because of its wids-spread dis- 

 tribiition the family had beeu of iuterest to many foreign 

 writers. 



Until the work of Quaintance and Baker appeaved, the 

 Aleyrodidae had been considered in an intermediate posi- 

 tion between the Aphididae and Coccidae, but these writ- 

 ers after a careful morphological stndy, decided that it 

 was ratherau offshoot frora the Psyllid group, being very 

 closely allied to this group in many particulars (Láms. 

 IjXVII and LXA^III). Similarities were found in wing vena- 

 tion, genitalia, mouth parts and legs, and during the past 

 year wci have reeeived specimens of Ak;yrodids frora Aus- 

 tralia which have the habits of the Psyllids. Enderlein and 

 Quaintance and Baker have divided the family into three 

 large subfamilies, TJdaraoselinae, Aleurodicinae and Aleu- 

 rodinae. In the latter classification the Udaraoselinae are 

 restricted to tliose forms in which both the media and 

 cubitus are present in the forewing, the Aleurodicinae to 

 those forms where the media is retained, but the cubitus 

 is lost, and the Aleurodinae with the media lost and the 

 cubitus retained. Eachsubfaraily contains one or more gen- 

 era and subgeuera, and the species of the family nura- 

 ber into the hundreds. 



Family ALEYRODIDAE Westwood 



Small or minute insects; oviparous, eggs stalked; me- 

 tamorphosis intermediate; larval stages (except ñrst) 

 quiescent upon leaves of plant; raost species surrounded 

 or covered with a waxy secretion. 



Mature sexes with four wings which are transparent 

 white, clouded or mottled with spots or bands. Antennae 

 in most genera of seveu segments; compound eyes single 

 or divided (reniform); ocelli two. Tarsi of two segments, 

 terminating in two claws, and a médium process or paro- 

 nychium; mouth parts suctorial, labium long, 3-segment- 

 ed, setae four; male genitalia a pair of prominent clasp- 

 ers; feraale genitalia an acute ovipositor. Anus opening 

 dorsally at the socalled (■.vasiform orifico». 



