ETPERSIA HALOPHILA. 195 



fine white mycelium commonly found in turf from 

 loamy soils, to which I have already called attention 

 (Vol. I. p. 64), also giving some hints on the treat- 

 ment of these coccids when found infesting pot-plants. 



EXPLANATION or THE PLATE. 



PL LXIX, figs 8, 8 a. Antennas of adult female. 



X 250. 

 Fig. 9. Leg of the adult female. X 250. 



GENUS EETOCOCCUS (Targioni-Tozzetti). 

 (PI. LXXI, figs. 1-16.) 



The normal characters of this genus are : Adult 

 female elongate or short ovate ; segmentation more 

 or less distinct ; dorsum or margin usually spiny. 

 Antennae of six or seven joints. Legs persistent. 

 Anal orifice with six or eight hairs. Anal lobes con- 

 spicuous. 



Ovisac of female usually elliptical or elongate, more 

 or less convex, felted, and either with or without a 

 minute opening at the anal extremity. 



Puparium of male resembling that of the female, but 

 much smaller. 



Males winged, or rarely apterous. 



The British representatives of this rather extensive 

 division are all typical species, and therefore afford all 

 the salient characteristics of the genus. About fifty 

 species have been described from various parts of the 

 world, of which no less than twenty-one are peculiar 

 to Australia. There is evidently a great variation in 

 the form of the ovisac in this genus, but more especially 

 so in the Australian representatives. Thus the ovisac 

 in Eriococcus eucalypti, Mask.,* is described as yellowish 

 or reddish-brown, or brown, but covered with a number 



* Ext. Trans. N. Z. Inst./ 1891, p. 27. 



