100 Ai.ril, 



record of its occurrence, and Walker omits it from his " List of 

 British Homoptera " (1860), so that it is virtually now added to the 

 British fauna. 



On December 23rd, 1885, on the small branches of an alder 

 (AInus glufinosa), a near ally of the birch, at Lewisham, I found 

 several scales of a Pidvinaria, but as they were then six months old, 

 perforated by parasites, and (with the ovisacs also) black with the 

 filmy grime of coal smoke that defiles every exposed thing within 

 many miles of London, I could do nothing with them, and I have 

 found none since, until on August 21st, 1890, on the same tree, there 

 were half a dozen of the same sort of scales in better condition than 

 on the former occasion, though evidently past their prime. Comparing 

 them with P. hetulcs, the scales conform very well to the foregoing 

 description of that species from birch, the chief difference to be per- 

 ceived being that in these the legs and antennae are much more slender, 

 and there is a very slight variation in the relative length of some of 

 the joints of the antennae, of which I give Mr. Newstead's figure for 

 comparison (-^c). As at present advised, I do not think there are 

 sufficient grounds to do more than to call this " var. P. aZ«/," but this 

 remains an open question. 



Adjacent to some of the $ scales were two or three of those of 

 the (J, from which the imago had not been developed. 



EXPLANATION OF PLATE I. 



Page 95 — Lecanimn nigrum, ? , fig. 1, antenna (abnormal). 

 „ 65 — ,, sarothamni, $ , fig. 2a, antenna, 2b, leg. 



„ 67 — „ ciliatum, $ , fig. 3a, scale (profile), 3b, scale (front view), 3e, 



antenna, 8d, $ scale (broken). 

 „ 96 — ,, distinffuendum, $ , fig. 4a, antenna, 4b, leg, 4c, (J antenna. 

 „ 98 — Pidvinaria betiilce, ? , fig. 5a, antenna, 5b, leg. 

 „ 100 — „ „ var. alni, $ , fig. 5 c, antenna. 



153, Lewisham Road, S.E. : 

 October, 1890. 



MICROPTERTX SANGII; A NEW SPECIES FROM BIRCH. 

 BY JOKN H. WOOD, M.B. 



When describing the larvae of some of our Micropteryges (vol. 

 xxvi, p. 1) I pointed out that, in addition to the five species known to 

 inhabit birch {Betula alba), there was also a sixth, which had not, up 

 to that time, been differentiated, and for which I proposed provisionally 

 the name of inconspicuella. 



