THE APHID OF TEA, COFFEE AND CACAO. 



339 



nearly all green, but a few were very dark and there seem endless variations in 

 those from Asia and Africa in colour, but very little in structural character. I 

 thus place the Tea, Coffee and Cocoa Aphid as follows : — • 



Toxoptera coffeae, Nietner. 



Aphis coffeae, Nietner. 



Ceylonia theaecola, Buckton. 



CeyJonia thaecola, Buckton (figure). 



Toxoptera fheobromae, Schouteden. 



The following is a detailed description of the species, which I have drawai up 

 from West Indian, Ceylonese and African material in my collection, taken on tea, 

 coffee and cacao. The colour is more or less taken from notes sent me and the 

 recent spirit specimens received. 



Alate viviparous female. 



Dark brownish to deep green or paler green on the abdomen, a few with it 

 fawTi-coloured. Head, pronotal band and thoracic lobes dark, almost black ; 

 the paler abdomen has small dark lateral spots and two dark lines on the venter. 



& 4 p31SS53» E. 



H. 



r Kiri 



Fig. 1. Toxoptera coffeae, Nietn. ; A, antenna and head of alate $ 

 from tea : B, cauda : C, cornicle ; D, head and antenna of apterous $ ; 

 E, cornicle ; F. cauda and cornicle • G, pronotal papilla ; H, head and 

 antenna of alate $ from cacao ; h.i, li.n, variations of the sensoria ; 

 h iii, sensoria further enlarged. 



arising from the third pair of black coxae ; some have a greener abdomen than 

 others. Cornicles, cauda and anal plate black. Antennae not quite as long as 

 the body, pale, with four dark bands (fig. 1, a and h), one at apex of third segment, 

 another at apex of fourth, one on apex of fifth and another close to it on basal area 

 of sixth ; first two segments black or very dark ; first wider and longer than the 

 second, the third longer than the fourth, but not so long as the sixth, with 4-6 

 roimd, double-contoured sensoria, usually 6 in number ; fourth and fifth about 

 equal in length ; sixth about as long as 4+5, its basal area about one-sixth the 

 length of the flagellum ; third to sixth segments plainly imbricated ; some 



