AFRICAN APHIDIDAE — PART III. 293 



base of femora ; with a few scattered hairs. Anal plate dark, with some long, pale 

 hairs. Small, slightly capitate hairs on the head ; body apjferently with no hairs. 

 Length, 1*8-2 mm. 



Uganda : Kampala (C. C. Gowdey). 



Food-plant. — Ferns. v 



Described from a number of alatae and apterae. Its general appearance and 

 shape resemble at first sight Idiopterus nephrolepidis, Davis, found on ferns in 

 America and England, but it is quite distinct. The wings show a marked, yet 

 narrow pale clouding along most of the veins, which also make it resemble Davis' 

 species, but the typical Myzus character and the antennal structure are quite distinct. 

 The colour can only roughly be described, as no colour notes were sent. 



In alcohol this insect gives a rich deep port- wine stain to the fluid. 



New Localities and Food-plants. 



Rhopalosiphum dianthi, Schrank. 



Bull. Ent. Res., iv, p. 320 (1914) ; vi, p. 153 (1915). 



Egypt : Cairo, 21.iii.08 and Spring, 1907 ; Ghezireh, 21.ii.08 (F. C. Willcocks). 



Food-plants. — On cabbages and savoys in great numbers, both alatae and 

 apterae, in company with Aphis brassicae, Linn. 



Aphis (Siphocoryne) brassicae, Linnaeus. 



Bull. Ent. Res., iv, p. 320 (1914) 



Egypt: Cairo, 16.iii.08 and Spring, 1907; Ghezireh, 21.ii.08 and 2.iv.09 

 (F. C. Willcocks). 



Food-plants. — On cabbage and savoys, in company with R. dianthi ; many atate 

 females and apterae. This species is now placed in the genus Siphocoryne, and I 

 think correctly. 



Hyalopterus pruni, Fabricius. 



Hyalopterus arundinis, Fabricius. 



Hyalopterus phragmiticola,, Oestlund. 



Previously recorded from Cairo on Primus spp. and various rushes (Arundo). 



Recently Mr. Willcocks has sent me specimens from the apricot or mishmish, 

 taken at Gizeh (10.iii.10), both alate and apterous females and also oviparous 

 females taken in January and notes on a winged male from the same locality. His 

 descriptions of the sexual forms are appended. He also sent specimens taken on 

 reed grass taken in February in the same locality. He finds that this grass is the 

 only alternative food-plant to the peach, apricot and plum. The insect appears in 

 large colonies on the underside of the leaves of the apricot, the leaves being little 

 malformed or curled, most hardly at all, a few with the margin slightly turned 

 down. The attack is usually severe during the spring months and the growth of 

 young trees is checked. The effect of this Aphid on peach is more marked, the 

 foliage suffering to a greater degree. 



I have never seen it on apricot or peach in this country, but it has been sent me from 

 the former from Woodbridge, Suffolk. 



