144 FEED. V. THEOBALD. 



From the general body markings and shape of the alate and apterous females 

 this insect resembles Anoecia corni, F., and A. [Schizoneura) panicola, Thos., but it 

 clearly differs from both. From the European corni it differs in having sensoria 

 on the third antennal segment in the apterous form and in generally having two on 

 the fourth segment (not three), and one on the fifth (not two), and only the one large 

 one at the base of the nail. In apterous corni I have never seen sensoria on the third 

 segment, but in some there may be none on any segment except on the fifth and 

 sixth. In the alatae the number of sensoria on the third is much the same, but in 

 willcocksi there are two, not three, sensoria on the fourth, and on the fifth one large 

 subapical one ; whilst in corni there are two others. In the American A. panicola, 

 the alate female, according to Hart's figure, has only five sensoria on the third segment 

 and one only on each following segment. 



This new species appears to be common on the roots of wheat in Egypt, but at 

 present we do not know to what bush the alate females fly. As there is some 

 variation in the sensoria in both alate and apterous forms in corni and the Egyptian 

 species I might place them as one, but there is also a marked difference in the 

 anterior form of the head ; in the Egyptian species it is markedly rounded, in the 

 European corni it is flat. 



Amongst the colonies of green apterae Mr. Willcocks found a few specimens of 

 darker ohvaceous hue, which he describes as follows : — Head dusky grey, the greyness 

 due to a mealy covering ; eyes black ; antennae with the two basal segments greyish ; 

 third with basal half pale, apical half smoky ; fourth to sixth pale smoky. Pro thorax 

 olivaceous, with sHghtly greyish mealy covering. Meso- and meta-notum olivaceous, 

 paler at the sides and between the segments. Abdomen ohvaceous above, greenish 

 laterally, highly polished ; two apical bands of olivaceous green ; numerous pale 

 hairs along lateral margins and apex. Venter pale green, slightly farinose ; hairs 

 pale, most numerous on apex. Anal plate dusky. Spiracles surrounded by dark 

 areas. Legs smoky, femora pale at base, tarsi dark. One specimen was quite dusky 

 all over the dorsum and the sides green ; they were not shiny, but otherwise resembled 

 the type described, except that the olivaceous areas are replaced by a dusky hue. 



Lachnus viminalis, Boyer. 



Aphis viminalis, Boyer. 



Aphis saligna, Sulzer, Walker. 



Aphis salicina, Zett. 



Aphis solids, Curtis. 



Lachnus dentatus, Le Baron ? 

 Boyer de Fonscolombe, Ann. Soc. Ent. Fr., x, p. 184 (1841) ; Sulzer, Ins., pi. ii, 

 fig. 6 (1761) ; Walker, List Homop. (B.M.), pt. iv, p. 959 (1852) ; Zetterstedt, Ins. 

 Lapp., i, p. 311 (1840) ; Curtis, Trans. Linn. Soc, vi, p. 75, pi. v., figs. 1 and 2 

 (1800) ; Passerini, Aphid. Ital., p. 64 (1863) ; Ferrari, Aphid. Liguriae, p. 80 (1872) ; 

 Buckton, Mono. Aphid. Brit., iii, p. 53, pi. xcix (1880) ; Muller, Eastbourne Nat. 

 Hist. Soc, pp. 1-6 (1881) ; Theobald, First Kept. Econ. Zool. Brit. Mus., p. 116 

 (1903) ; Theobald, Journ. S.E. Agric Coll., no. 14, pp. 126-132, fig. 36 (1905) ; 

 Schouteden, Mem. Soc Ent. Belg., xii, p. 207 (1906) ; Theobald, Kept. Econ. Zool. 

 for 1912, pp. 96-98 (1913). 



