﻿22 THE ENTOMOLOGIST. 



some seventy wingless females from a poplar, Wye, July 14th, 1911. 

 The insects were densely packed on the yomig wood near the top of 

 a shoot. After several days' searching, I could find no more of this 

 marked species. 



Genus Pemphigus, Hartig. (Byrsocrypta, Hahday). 



Pemphigus injriformis, Lichtenstein. — Ulcombe and Bilting, near 

 Wye, June. Galls full of winged females, continued at Bilting until 

 July 9th, when winged females, pupas and larvae, still in galls. Also 

 from Haddenham, Cambridgeshire, June 27th, 1911. 



P. marsuinalis, Couchet. — Bilting, near Wye, July 9th, 1911. 

 Galls found on poplars with the former, but scarce. Winged females 

 and nymphs and a few larva3. 



P. affinis, Kaltenbach. — Bilting, near Wye, July 9th, 1911. Very 

 abundant on poplars with above, notably with the latter on the pointed- 

 leaved poplars. All winged females, many having left the galled 

 leaves. Colour of young galled leaves tinged with red and pink, of 

 older ones pale yellow. The females with very mealy coverings. 



P. filaginis, Boyer. — Wye, near railway station, on Gnaphalmm 

 uligmosuvi, the marsh cudweed ; September 17th, on a few roadside 

 plants. Many apterous females and one winged. Looks much like 

 P. affinis/-' but slightly distinct. Produces a copious mass of white 

 wool. I failed to find the host plant near Bilting, where P. affinis 

 occurs on the poplars some two miles away. At this time there is no 

 trace at all of live Pemphigus on the poplars, and it is quite possible 

 that Boyer's filaginis is the migrant form of the poplar gall aphis of 

 Lichtenstein. 



Kaltenbach's Gnaphalium appears to be the same species. 



P. lactucarius, Passerini. — On lettuce, July 24:th, 1904, Wye. 

 Wingless females and also winged females. 



Genus Schizoneura, Hartig. 

 Schizoneura corni, Fabricius. — On Cornus sanguinea near Wye ; 

 winged females appeared in abundance beneath the leaves on October 

 7th, and produced living young. Still breeding, October 17th, and 

 very numerous. 



Genus Lachnus, Burmeister. 

 Lachnus tomentosus, De Geer. — Wye Downs, on Scots fir, August 

 20th, 1911, a colony of wingless females. Also sent me on September 

 10th, from Pitlochry, N.B., by Mr. Duftield. I have three other 

 Lachnus which I cannot yet identify, all from Conifers. 



Genus Vacuna, Heyden. 

 Vacuna dryophila, Westwood. — Wye, on oaks, July 4th, 1909. 

 Winged and wingless females. 



Genus Ehizoicus, Passerini (Khizobius Burmeister). 

 Ehizoicus {Rhizohius) graminis, Buckton. — Eoots of grasses, 

 Paddock Wood, 1904, in winter. 



* Lichtenstein (1886) places this as the type of his genus BucMonia, 



