NEW AND LITTLE KNOWN BRITISH APHIDES. 159 



along its whole length ; fourth as long as fifth ; sixth as long as or a 

 little longer than fourth and fifth, basal area nearly one-half length 

 ■of fifth ; flagellum four times as long as basal area ; third to sixth 

 itabricated. Cornicles slightly longer and much broader than fourth 

 antennal segment, cylindrical, slightly expanding basally (in some 

 tliey are the same length as the fourth segment), markedly imbricated. 

 Cauda about half length of cornicles, acuminate, broad at base, 

 spinose, with four hairs each side. Anal plate black and spinose, with 

 hairs. Wings normal ; second cubital cell with the stem as long as 

 the cell to not quite so long. 

 Length, 1-9-2 mm. 



Apterous viviparous female. — Similar to A. galii in colour, but 

 ■cornicles very much longer. Antennae shorter than body. Cornicles 

 black, longer than third antennal segment. Cauda black, one-fourth 

 to less the length of cornicles. Basal segment of antenna larger 

 than second ; third longer than fourth, but not so long as sixth ; 

 fourth longer than fifth ; sixth about as long as fourth and fifth, its 

 basal area half as long as fifth, and not quite as long as one-quarter 

 the length of flagellum ; fifth and sixth black. Cornicles thicker than 

 antenme, but thinner than cauda, densely imbricated and laterally 

 serrated. Cauda broad at base, narrowed to apex, which is blunt, 

 with three hairs on each side, finely spinose. Eyes black, rather 

 small. Legs moderately long and thick ; brownish-yellow ; tarsi 

 ^dark and to some extent the apex of tibite and femora. 



Length, 1-5-1-7 mm. 



Food Plant. — Bedstraw (Galium cruciatum). 



Localities.— Stoutina, nr. Hythe (23, v, 13) ; Wye (1-10, vi, 13) ; 

 Yarmouth, Isle of Wight (1, vii, 15). 



De>cribed from a series collected by Captain Alban Duffield, 

 M.C., and myself at Stouting and Wye. It bears a general 

 resemnlance to Kaltenbach's Aphis (lalii, but can be separated at 

 once by the long cornicles. It lives in dense clusters on the toj) 

 shoots of the Bedstraw, both on the stems and under and on the 

 leaves and also in the flower heads. I have never noticed any 

 di-tortion caused by it. The colour varies roughly from almost 

 black to deep dusivy or clayey brown. From the shiny black 

 Aphi^ apariues, Kaltenbach, the Aphis molluginii^, Koch, it may 

 al>o be told by its long cornicles, especially of the apter^ in 

 which they diverge, and not markedly converging as in that 

 species, which feeds on Gallium mollugo. Del Guercio describes 

 an apbis on Galium erectum from Portugal, the apterous female 

 being dark green and pear-shaped and the alate female with four 

 sensoria on the terminal third of the third antennal segment, and 

 another, ApJii.^ phlomoidea, which is green like A. erecta, but with 

 ringed antenna? in the alate female and with three rows of 

 sensoria on the third segment, and the cornicles in the apterous 

 female barely longer than the cauda. The species described here 

 can clearly be none of these. 



