748 
RHYNCHOTA. 
Nyzus nerii, Boyr. 
Macrosiphum granarium, Kby. 
Chaitophorus maculatus, Buckt. 
Rhizobius jujubce, Buckt. 
Ceylonia thececola, Buckt. 
Schizoneura lanigera, Hausm. 
Pemphigus cedificator , Buckt. 
,, napceus ,, 
,, immunis ,, 
Siphonophora rosce, Beam. 
Rhopalosiphum nymphece , Fabr. 
,, dianthi, Schr. 
Oregma h ambus ce, Buckt. 
on Ak. ( Calotropis ). 
,, Wheat, barley, etc. 
,, Lucerne. 
,, Ber ( Zizyphus jujubce). 
,, Tea. 
„ Apple. 
,, Pistachia terebinthus. 
,, Poplar. 
,, Aspen. 
,, Rose. 
,, Aquatic plants. 
,, Rape. 
,, Bamboo. 
Aleurodim;. 
Mealy wings. Tarsi two-jointed. Both sexes winged , with jew veins. 
Nymph in a scale with a vasiform orifice. 
This is a family of small insects, difficult to distinguish in any but the 
adult winged stage from Coccidce. The adults have two pairs of wings, 
Fig. 523— Aleurodes nubilans. (I. M. N.) 
with at most two veins in each ; this separates them from Coccidce in 
which the male has but one pair of wings, the female none, and from 
Psyllidce, in which the wings have more than two distinct veins. The 
adults are small moth-like insects, with floury wings, usually white, 
sometimes with black or grey spots or bands. 
