76 THE ENTOMOLOGIST. 



Cornwall, and were placed in his cabinet between suffumata 

 and silaceata. 



A. W. Mera. 



Outwood, High Koad, 

 Loughton. 



NOTES ON NEW AND LITTLE KNOWN BRITISH 

 APHIDES. 



III. 



By Fred. V. Theobald, M.A., F.E.S., etc. 



18. Pemphigus borealis, Tullgren (' Arkiv. f. Zoologi,' v, No. 14, 



p. 142, 1909). 



In 1904 I took a number of a species of Pemyhigus in July 

 on lettuce roots at Wye, and had labelled them Pemj)h'igus lactu- 

 carins, Passerini (which is the same as Linnaeus' P. bursarius). 

 I now find that they are the species described by Tullgren as 

 horeolis taken on poplars {Po2)ulus). It is possible that thia 

 insect migrates from the poplars to the lettuce and other plants. 



I have not yet been able to identify it in Britain on poplars 



19. Procipliilus cratagi, Tullgren (' Arkiv, f. Zoologi/ v, No. 14, 



pp. 96-102, 1909). 



This very marked Pemphigid, described by Tullgren, was 

 sent me by Mr. E. Green from Camberley on June 13th, 1916, 

 taken on hawthorn. A single colony sent showed much white 

 flocculent wool and farinose matter, and consisted of about fifty 

 alate females and some nymphae ; the former evidently hatched 

 out in transit. The alate females were decidedly mealy in 

 appearance and their wings dusted with a fine grey powder. In 

 habit they were very sluggish. 



The thorax of these alatse was black, the abdomen green to a 

 dull greyish -green. 



The nymphas a pale green. One apterous female sent was a 

 dull greyish-green also. 



Further colonies were received on the 17th in a fresher 

 condition. 



The " hawthorn " leaves sent with them had a fine mealy 

 coating all over them, especially on their upper surfaces, and 

 also much white wool where nymphae were present in any 

 numbers. 



Alatae continued to hatch'out until July 3id. These produced 

 young in the breeding-jars, in which I had placed rooted grasses 

 and various other plants, with the hope that the viviparae might 

 develop on the roots, especially as ail the alate females moved 



