NOTES ON APHIDES FROM SUTHERLAND 



87 



Wicklow, and I am much indebted to Mr Laing for compar- 

 ing my specimens with the type in Walker's collection 

 and confirming their identity. The various forms are 

 described below. 



Apterous Vivipm'oiis Female. (Fig. i, C, and Fig. 2, C, D.) 



Jet black, the apex of the abdomen with a large tuft 

 of flaky white tomentum. Antennae brown, the base of the 



j>,jr^. 



Fig. I. 



Rhopalosiphum eriophori^ Walker. 



A = Antenna of alate viviparous female, x 96. 



B = Pourtla and fifth segments of antenna of male. X 96. 



C = Antenna of apterous viviparous female, x 96. 



third segment paler. Each segment with several very 

 distinct bristles; 4th, 5th, and 6th segments imbricated. 

 Third segment only slightly imbricated and with one to 

 five sensoria. Segments 5 and 6 each with a primary 

 sensoria, that on 6 with five small sensoria beside it. Apex 

 of spur with three bristles. Proportions of segments, 14, 11, 

 32, 17, 17 (12+36). Total length 0-92 mm. to 0-96 mm. 

 Head without prominent antennal tubercles, broader than 

 long and with several bristles. Front convex in the middle. 

 Rostrum reaching to the midcoxae. Thoracic and abdominal 

 segments each with a number of singly placed bristles on 



