1920.] 



129 



Median lobes {cycadis). V^ery sliglilly recessed: projecting far beyond the 

 margin ; free edge minutely serratulate ; apex at a con- 

 siderable distance from the outer edge ; a dense chitinous 

 fold across the base ; greatest width from two to three times 

 the distance between first and second squames. 



Lateral lobes (t/ault/ieriae). Both lobules strongly developed ; base of inner 

 lobule extending far within the margin. 

 {m-(/entosis) . Inner lobule only strongly developed ; its base not 



extending within the margin. 

 (cycadis). Ditto, ditto. 



Other, but less important, differences between gaultheriae and 

 cycadis are noticeable in the number of pores in the supplementary 

 groups of circumgenital glands. These average 5 (for the median 

 group) and 7 (lateral groups) in gaitltheriae; while, in cycadis they 

 are said to average 3 in each group. The puparium of gaultheriae 

 exhibits a brilliant silky sheen, which appears to be absent in that of 

 cycadis. 



Chionaspis sal ids L. 



I have taken this species on stems of Jasminum at Stroud ; and the 

 stem of a young Lime tree at Bournemouth was observed to be densely 

 encrusted with scales of the same insect. 



Aspidiotus palmae Ckll. 



Examples of this insect, which, hitherto, has not been recorded from 

 the British Isles, were sent to me, in May of last year, from Ouudle, 



Fig. 8. — As-pidiotus palmae : pygidium of adult 9 , X 450, 



Northants, where they occurred freely upon Kerahts (a Eromeliad). 

 The species is well characterized by the unusually prominent and 

 arborescent marginal squames which form a conspicuous fringe on the 

 posterior extremity of the female, almost completely masking the pygidial 

 lobes (see fig. 8). 



