20 Bulletin de la Société Entomologique iìE<ì>jpi'^ 



sta, Erythrina spp, Zizyphus spp, Ceratonia siliqua, 

 Psidium guajava, Acacia arabica, Parkinsonia acu- 

 leata, Robinia pseudacacia, Cajanus indiens. As a 

 rule annuals escape serious damage unless they are 

 in close proximity to heavy infection. This applies in 

 particular to cotton which is highly susceptible and 

 may be much damaged if it becomes infected suffi- 

 ciently early. 



An infected tree is characterised by the gnarl- 

 ing of the growing points which renders them 

 (msightly and checks or even arrests growth. The 

 growing points are always the places to look 

 for infection but in bad cases the insects can 

 be found almost anywhere on the tree. At the end of 

 the summer the adult females seek the best available 

 shelter in which to lay their eggs, so that they may 

 withstand the more rigorous winter conditions, and 

 the ovisacs are found in large numbers in the crevices 

 on the bark. 



Description 



\duU Female : 



The adult female is reddish in colour, slightly 

 elongate, and ovate and sparsely covered with white 

 mealy wax the colour of the body showing through, 

 especially at the articulation of the abdominal seg- 

 ments. Marginal appendages absent and caudal ap- 

 pendages frequently apparently so. The caudal setae 

 have no secretions on them and are inconspicious. 

 There may be a little cottony secretion at the pos- 

 terior extremity. The antennae are long, moderately 



