54 BEITISH APHIDES. 



Aphis salicis, W. Curtis (?). 



,, saligna, Walker. 

 Lachnus viminalis, Pass. 



Apterous viviparous female. 



Inch. Millimetres. 



Size of body 0-160X0-12O 4-06x305. 



Length of antennse 0-070 1-77. 



„ cornicles O'OIO 0-25. 



Very large, globose, shining from a fine pile of silky 

 grey hair. Colour dark ochreous brown. Head 

 small, front flat. Antennae short and slender, reddish 

 at their bases but black at their tips. Two cm^ved 

 spots on the thorax. Abdomen very globose ; centre 

 of the dorsum furnished with a characteristic horn-like 

 eminence. Cornicles large and obtuse. The dorsum 

 has several rows of large transverse black spots. 

 Cauda none. Legs long, particularly the hinder pair ; 

 pilose. 



Pupa. 



More elongated than the larva ; colour very similar. 

 Wing-cases sienna-brown, as also are the upper parts 

 of the tibiae. Dorsal tubercle large. 



Winged viviparous female. 



Incli. Millimeti'es. 



Expanse of wings 0*600 15"24. 



Size of body 0-180x0-070 4-56xl'77. 



Length of antennae 0*070 1-77. 



„ cornicles O'OIO 0'25. 



Very large, general colour like the above insect. 

 Head small. Antennae very short and slender. 

 Thorax robust. Abdomen oval, spotted with black, 

 the largest spot being placed in the middle ring. 

 This spot, which is covered by fine silky hair, seems 

 to be the representative of the large tubercle pos- 



