FURTHER NOTES ON APHIDES l6l 



thickly clustered near the apex of the terminal shoots of thistle 

 {Cnicus arvensis?) at Swordale, Evanton, on 15th August. 



Aphis grossularicB, Kalt. I took alate viviparous females on 

 gooseberry at Stirkoke, Wick, on 9th September. 



Aphis ilicis, Kalt. I noticed in the beginning of September that 

 many of the holly leaves at Stirkoke, Wick, were curled by the 

 action of this species, and numbers of dead ap erous females and 

 a few winged ones were to be found on the under-surface of the 

 leaves. Each aphide was more or less covered with a greenish grey 

 mould from which the legs of the insect projected, and though 

 I searched carefully I could not find a single live specimen. 



Aphis myosotides, Koch. Apterous females and young were 

 abundant on Myosotis in the garden at Swordale, Evanton, on 15th 

 July. They occurred on the young flowering shoots, inside the 

 young leaves, and on the under-surface of the old ones, and the 

 growth of the plants was stunted in consequence. 



Aphis pruni, Reaumur. I found nymphas and alatte on plum 

 leaves at Evanton on nth July. 



Aphis ri/f?iicis, Linn. Alate viviparous females occurred on leeks 

 at Swordale, Evanton, on 12th August, and I took one at Stirkoke, 

 Wick, resting on a blade of grass on loth September. 



Aphis viburni, Scopoli. I found alate and apterous viviparous 

 females, larvae, and nymphce on Viburnum at Stirkoke, Wick, on 

 loth September. 



Aphis achillece, F. This species was originally described by 

 C. J. Fabricius in 1776 in his "Gen. Ins.," p. 302. His description 

 is as follows: "flavescens, abdomine viridi, antennis pedibusque 

 albidis. Habitat in Achillea mi lief olio. Antennae filiformis, albids. 

 Alae albidiB. Anus, slytus et cornicula albida. Frequens kiliae." 



As no further description has been made of this insect I here 

 describe it 



Alate viviparous female. Head dark brown, antenna blackish 

 brown, 0.899 ^i"^'^!- to 0.96 mm. long, about three-quarters the length 

 of the body; the third segment imbricated with fifteen to twenty 

 conspicuous sensoria with double contour distributed along it ; 

 fourth segment nearly half the size of the third, imbricated, and with 

 four or five sensoria with double contour; fifth segment shorter than 

 the fourth, imbricated, and with a large apical sensorium ; sixth 

 segment imbricated, and with rhinarium and two small sensoria 

 below it. Pronotum. brownish ochreous, meso- and meta-nota dark 

 brown, abdomen brownish ochreous, legs dingy brownish ochreous, 

 with the apices of the femora and tibi^ dark brown. Cornicles 

 brownish ochreous, short and thick, rather restricted at the base 



93 AND 94 S 



