NOTES ON APHIDES FROM SUTHERLAND 53 



marshy ground near the Kyle of Sutherland, Invershin, on 

 19th September 1920. They were most common on the 

 yellowish withered ends of the blades. The majority were 

 apterous oviparous females, and these were sluggish in habit 

 and occurred stationary upon the blades. Males (apterous) 

 were common and were to be found running about upon 

 the grasses. Lineal green eggs were found later on the 

 grass leaves inside the tin in which the aphides were 

 placed, and black eggs, probably longer laid, also occurred. 

 Apterous viviparous females were rare and the few specimens 

 found were mostly dying. 



Genus ChaitopJiorus, Koch. 



Chaitophorus populi^ Linn., var. leuconielas, Koch. — Common 

 on the under surface of leaves of aspen near Inveran, Inver- 

 shin, on 14th September 1920. Alate males and nymphae 

 were particularly common, oviparous females were less 

 abundant, and apterous viviparous females were scarce. 

 Also taken at Rogie Falls, Strathpeffer, 22nd September 

 1 92 1. 



ChaitopJiorus salicivoriis, Walker. — Apterous viviparous 

 females and larvae swarmed upon the under surface of the 

 leaves of a bush ■ of sallow {Salix capred) near Inveran 

 Invershin, on 5th September. The leaves of this whole 

 bush were withered and darkened by their attack, but on 

 the other sallows near by no aphides were to be found 

 and the leaves were of normal colour. On 8th October 

 192 1 a sallow growing near Nigg, Ross-shire, was found 

 to be similarly attacked by this species, but only apterous 

 oviparous females, apterous males, and larvae were found. 

 Many specimens were attacked by the fungi Empusa 

 {EntoiiiopJitJioj'd) spJicerosperma^ Fresenius, and Cladosporium 

 aphidis^ Thiirm, for the identification of which I am indebted 

 to Mrs N. L. Alcock. 



Genus AtJieroides^ Haliday. 



Atheroides hirtellus, Haliday. — Found commonly upon 

 the blades of Tufted Hairgrass {Aira ccespitosa L.) growing 

 amongst rushes near the Kyle of Sutherland, Invershin, on 



