118 LECANIUM HEMISPHJEKICUM. 



blotches on the collar ; antennae and legs paler ; wings 

 iridescent ; eyes and ocelli pitchy black. Head, viewed 

 in profile, pyriform, widest in front. Eyes conspicuous ; 

 ocelli fonr in number, very large, dorsal pair placed 

 immediately behind the antennas, ventral pair placed 

 very low down. Antennas of ten joints, very hairy ; 

 ninth joint with one or two additional long hairs, 

 and the apical joint with, usually, four, of which the 

 central pair are very faintly clubbed (fig. 12). Legs 

 ordinary. Terminal segment of abdomen (fig. 11) 

 with tivo pairs of tubercles ; the lowest pair, being 

 enormously developed, are thickly set with long hairs 

 and articulated to a large chitinised joint or process, 

 which is attached to the lateral sides of the base of the 

 genitalia. Anal filaments ordinary, their place of 

 attachment to the body bearing a few spinnerets and 

 several hairs of varying length. Genital sheath or 

 stylus with unusually long marginal hairs. 



Habitat (under glass). On various plants, and one 

 of the commonest of our greenhouse coccids. It was 

 first recorded as British by Mr. Douglas* from speci- 

 mens obtained at Canterbury by Mr. G. S. Saunders. 

 But long prior to this the insect must have been 

 recognised as a pest by horticulturists. Douglas also 

 records it from Sale, Cheshire (Cameron), in which 

 county I find it abundant in many places ; also in the 

 London district ; Deptf ord (W. Morris) ; and Armagh 

 (Rev. W. F. Johnson). It is abundant at the Royal 

 Gardens, Kew (Nicholson and Green), where I also 

 have found it on various plants. Dr. D. Sharp has 

 sent it from Cambridge, and it is common in the 

 same county at Upwell and surrounding district. In 

 Norfolk it is common in many places, and it was at 

 Ingoldisthorpe, near King's Lynn, that I obtained 

 males in a cool conservatory ; these, so far, being the 

 only examples known to have occurred in the British 

 Isles. It is common also in many parts of Denbigh- 

 shire, Flintshire, and Carnarvonshire. 



* ' Ent. Mo. Mag./ vol. xxiii, p. 78 (1886). 



