APHIS PBDIOULARIS. 4l 



Inch. Millimetres. 



Size of body O'OeOxO'OSO l-54x0'76. 



Lengtli of antennge 0'025 0*62. —-j 



cornicles 0*007 1-77:- — 



Plentiful on the whitethorn at Wanstead in Novem- 

 ber, where it was mixed with the pupae and the winged 

 females. These insects were sent to me by Mr. Walker, 

 who, nevertheless, could not satisfy himself of their 

 species. 



It does not appear to be A. cratcegaria of Walker ; 

 and, as it wants the thoracic spines, and also does not, 

 so far as I can discover, possess the two small 

 tubercles on the abdomen characterised by Kalten- 

 bach, it cannot be his Aphis cratcegi. 



1 think it is therefore well to give it the provisional 

 name of A. edentula from its abdominal toothless 

 character. 



Aphis pedicularis, BucMon. Plate XLVIII, figs. 4, 5. 

 Apterous viviparous female. 



The general colour of this insect is dull yellowish- 

 green; form broadest across the nectaries. Head 

 convex. Eyes brown. Abdomen very transparent, 

 showing the underlying tracheae like a plaiting of silver 

 threads. Embryos also visible through the skin. Nec- 

 taries and the legs stout, the last a little clouded at 

 the tips of the femora and tarsi. Tail large, green, and 

 hairy. Rostrum reaches nearly to the second coxge. 

 Body slightly mealy. 



The young, just born, measure 0*025x0-012 inch. 

 The nectaries are at this time very short, whilst the 

 rostrum reaches considerably beyond the third coxse. 



