HYALOPTEKUS DILINEATUS, 113 



more active than the plum Aphis, which does not affect 

 the upper sides of those leaves upon which it feeds. 

 The winged form is somewhat solitary in its haunts. 



Hyalopterus DILINEATUS, BucJdon, Plate LXXYI. 



Apterous viviparous female. 



Inch. Millimetres. 



Size of body 0-060 X 0-027 l-52x0'67. 



Length of antennas 0'025 0"62. 



cornicles 0-002 0*05. 



Small, oval, more linear than H. pruni. Body 

 bright pale green, with two well-marked longitudinal, 

 blotched, dark green lines down the dorsum. Head 

 and thoracic region broad. Antennae, cornicles, and 

 legs pale green. Eyes brown. Rostrum short. 



Sometimes numerous in July, at Haslemere and at 

 Wanstead, feeding in company with Siphonophora rosoe 

 on Rosa centifolia. At that time they are adult and 

 full of embryos. 



Variety a. More linear. Nectaries longer. Head, 

 two thoracic spots, and two broad converging lines 

 down the dorsum, dark brown. Cauda dark and hir- 

 sute. 



Pupa. 



Like the apterous female. Bright green and slightly 

 mealy. Wing-cases with smoky tips. Eyes red. 



Many specimens were kindly sent me by Mr. Thomas 

 Hardy, from Alnwick, Northumberland. They were 

 all feeding on the moss-rose at the end of May. 



Winged viviparous female. 



Inch. Millimetres. 



Expanse of wings 0-280 "^ 8-10. 



Size of body 0-070x0-030 1-77x0-76. 



Length of antennge 0-060 1-52, 



cornicles 0*007 0-17. 



VOL. II. 8 



