i6o THE SCOTTISH NATURALIST 



Oviparous female. Apterous; antennce pale, almost as long as 

 the body ; third segment without sensoria but with several scattered 

 bristles; the fourth segment is about two-thirds the length of the 

 third and has no sensoria, its apical portion is faintly imbricated ; 

 the fifth is slightly longer than the fourth, imbricated, and bearing 

 at its apex a conspicuous sensorium with double contour. The 

 sixth segment is imbricated and has the rhinarium conspicuous 

 with a group of six small sensoria below it. Cornicles pale, more 

 than twice the length of the cauda, slightly swollen in the centre, 

 the apex narrowly reticulate, and with traces of imbrications before 

 it. The cauda is pale, much smaller than that of the oviparous,, 

 female of R. brittcni, covered with very short pale bristles in trans- 

 verse lines, and with three long bristles on one side and four on the 

 other. Hind tibiae swollen and set with large and small sensoria for 

 more than three-quarters their length. Lengthy 2.0 mm. 



Rhopalosiphum persice, Sulzer. Apterous viviparous females, 

 larvre, and nymphse were common on the under-surface of potato 

 leaves at Stirkoke, Wick, on 9th September. The nymphae developed 

 into winged viviparous females a few days later. Several of the 

 apterous females were found dead on the leaves infected by a 

 fungus which developed also upon other specimens kept under 

 observation. Mr A. D. Cotton has identified this fungus as 

 EiiipKsa [Triplosporiuni) Frese/U!, Nowakowski. 



Genus Hyalopterus, Koch. 



Hyalopterus Jlavus, Kittel {aquilegice^ Koch, and trikodus, 

 Walker}. This species was abundant on columbine {Aqidlegia) 

 in the garden at Swordale, Evanton. In the beginning of July I 

 found only alate viviparous females and the young they had pro- 

 duced, but on examining the plants again on the 19th September I 

 found numbers of apterous viviparous females and nymphce; from 

 the latter I reared viviparous females. A few Syrphid and 

 Cecidomyid larvae were preying upon them, but had made small 

 impression on their numbers. This species also occurred at 

 Stirkoke, Wick, where I took a few apterous viviparous females on 

 the nth September. 



Genus Aphis, Linnaeus. 



Aphis adjecta, Walker. Apterous viviparous females and young 

 occurred on chrysanthemum in the garden at Swordale, Evanton, 

 on 5th July. They were much parasitised by a Chalcid. I found 

 them also on Eryngiuin alpiniim in the beginning of September. 



Aphis cardui, Linn. Numbers of apterous viviparous females 

 and young, together with a few nymphae and alatae, were found 



