NOTES ON NEW AND LITTLE KNOWN BRITISHAPHIDES 77 



down to the soil and none seemed to take wing. However, I 

 can find no trace of this Aphid on the roots of some fifteen plants 

 where the alatse produced their progeny. 



20. Drepanosiphum aeerina, Walker. 



A single alate female of this apparently uncommon species 

 was sent me by Mr. Eymer Roberts on July 25th, 1916, taken 

 on maple at Rothamsted. It was not as yellow as this species 

 was figured by Buckton in his monograph, being a pallid 

 yellowish-green to lemon-yellow ; the two marked cross-bars 

 on the abdomen were thick and the cornicles a rich pale chest- 

 nut-brown. 



The species is, however, very marked. 



21. Aphis familiaris, Walker (' Zoologist,' vi, p. 2219, 1848). 



In 1848 Walker described several species of Aphides from 

 "the small bugloss {Echiiim vidgare) under the following names : 

 familiaris, adjuvans, adscita, conjmicta, hasalis, Ij/copsidis, con- 

 sueta, adjasta, and suffragans. It seems to me that there are 

 only two species amongst these, namely : 



1. Aphis familiaris (including adjiivajis and adscita). 



2. Aphis lycopsidis (including consueta, the oviparous female ; 



adjusta, the nymph ; suffragans, the alate female ; also 

 conjuncta and basalis). 



All Walker's bugloss species were found at Fleetwood in the 

 autumn, evidently all together. 



These species, as it appears, seem to have been founded both 

 on different stages and colour variation of certainly no more 

 than two true species. 



On August 22nd, 1916, Mr. Bagnall sent me some Aphides 

 taken on bugloss {Echium vulgare) at Stockport. These were 

 undoubtedly Walker's Aphis familiaris, not recorded since the 

 date of the original description. Most were apterne, but there 

 were two alate females, unfortunately both too damaged to 

 describe. 



The apterffi are pale green to yellow, rather shiny, with very 

 short cornicles, which may be all pale or slightly dusky at the 

 tips. This species seems to be very sluggish in its movements, 

 and not easily removed from between the petioles of the blossoms. 

 A few also were found on and under the leaves. Some black 

 varieties occurred, and I fancy that these are merely parasitised 

 specimens. 



I also found this species on Romney Marsh, at Dymchurch, 

 in Kent, in July, 1916. The apterae of Aphis familiaris have the 

 antennae shorter than the body ; in Aphis lycopsidis they are 

 longer than the body. 



In the alatfB of familiaris {= adscita) the antennae are as 



