9«Q [December, 



margin, beino- recessed in a, median excavation; their distal margins strongly 

 indented iit three points (one on the outer and two on the inn6r side of each). 

 They are separated by a space equal to their own breadth, and bearing two 

 spiniforni sq names — one of which is almost invariably longer than the other. 

 There are no circumgenital ceriferous pores. Some conspicuous oval pores 

 open on to ihe dorsal surface. 

 Length 1'25-1'5 mm. 



On Neplirodium sp. (under glass), Royal Botanic Gardens, Kew. 

 The scales are often partiallj^ concealed beneath the sporangia of 

 the fern. 



Leonardi has erected two suhgenera (Opunfiaspis a,n(\. Mi/filella) 

 to contain those species in which the cephalothorax is sharply demarked 

 from the abdomen — as in desmidioides. This species is, however, 

 debarred from inclusion in Opiintiaspis, as the puparia are without 

 longitudinal ribs ; it is equally excluded from Mytilella on account of 

 the absence of circumgenital pores. 



Kuwania gorodetsJcia Na.ssonow. 



After reix)i-ting the occurrence of this species at Camberley, in lOl^, 

 I completely lost sight of it, though I searched the same trees and others 

 in the neighbourhood each year. In June of the present year (1917) it 

 reappeared in some abundance. I was again too late to observe the 

 nvmphal stage. At the time of their rediscovery the insects had already 

 constructed ovisacs and were depositing their eggs. As before, a few 

 obvious examples were noticed in crevices of the bark, usually near the 

 base of the tree ; but most of them had left the stems and had fonned 

 their ovisacs amongst dead leaves and rubbish at the base of the trees. 

 They seem to prefer old leaves that have become plastered together by 

 the action of the weather. Another favourite situation is within a 

 tightly curled fallen leaf, in one of which as many as five or six 

 individuals may be collected. In such cases the ovisacs are more or 

 less confluent. 



Three dead and partialh' decayed male Coccids were found entangled 

 in the woolly material of the ovisacs ; bvit I am doubtful if they can 

 be really associated with this species. They had none of the special 

 characters that are common to the males of other Margarodinae, but 

 were more like those of a Pseudococcus, having simple eyes and a single 

 pair of long, white, caudal lilaments. The true male oi Kuwania may be 

 expected to exhibit compound, facetted eyes, and a tuft of long silky 

 hairs springing from the dorsum of the penultunate segment of the body. 

 Should these Pseudococcus-Yike males eventually prove to be truly asso- 

 ciated with gorudelskla, the species must be excluded from the genus 



