54 THE SCOTTISH NATURALIST 



19th September 1920. The aphides occurred in longitudinal 

 rows along the hollows between the ridges on the upper 

 surface of the leaves, with their heads directed to the apex 

 of the leaf. Oviparous females were common, and beside 

 them in the channels on the leaves were greenish lineal eggs. 

 Apterous viviparous females were much less common, but 

 larval oviparous females were abundant. Several specimens 

 were attacked by the fungus Ej/ipusa {EntoinophtJiord) 

 aphidis, Hoffman, which Mrs N. L. Alcock has most kindly 

 identified for me. 



On 1 2th July 1921 I revisited this locality, but though I 

 made a thorough search of the Tufted Hairgrass in the very 

 spot where the aphides had been so abundant the previous 

 year, I failed to find a single specimen or any eggs. 



Atheroides serrulatus, Haliday. — Found singly on short 

 blades of grass growing in rough pasture near Inveran, 

 Invershin, on 23rd September. They were mostly oviparous 

 females and larvae, but a few viviparous females, frequently 

 parasitised, also occurred. The young are strikingly 

 different in colour from the full-grown specimens, being 

 bright yellow, sometimes tinted with green, with rows of 

 brown or reddish brown spots upon the dorsal surface of the 

 abdominal segments, and the head and thorax brown. 



Sub-tribe Callipterina. 



Genus Synidobius, Mordwilko. 



Symdobhis oblongus, Heyden. — Common upon birch 

 near Inveran, Invershin, in the beginning of September 

 1920. The aphides were to be found thickly clustered 

 on the twigs and lower branches, with which their colour 

 exactly harmonised. The colonies were always attended 

 by several specimens of Formica rufa. No alate aphides 

 were found ; apterous viviparous females and young were 

 abundant and a few apterous males and oviparous females 

 also occurred. 



Genus Myzocallis, Passerini. 



Myzocallis alni, Fabricius (non Essig). — On leaves of alder 

 at Inveran, Invershin, on 14th September 1920. Oviparous 



