118 FRED. V. THEOBALD. 



Egypt : Gizeh, 18.ii.08 (F. C. Willcocks). 



Food-plant. Wheat. 



Mr. Willcocks describes this species as " a very handsome green and crimson 

 insect " inhabiting the lower part of the stems of wheat and the adventitious roots 

 and also found on a spiky creeping grass, a common weed of agricultural land. 



Its marked characters are the brilliant coloration, the presence of long hairs on 

 the antennae and legs, and the shortness of the third to fifth antennal segments. 

 In some respects it resembles Forbes' Aphis maidisradicis, but this species is all green 

 and not the bright green and crimson of this one found in Egypt. Moreover, in com- 

 paring American specimens it is seen to be quite distinct. 



I have not seen the alate female, so give Mr. Willcocks' notes on this form and 

 also on the larva and nymph. 



Siphocoryne nymphaeae, L. 



Aphis nymphaeae, L. 



Aphis plantarum aqiiaticum, F. 



Rhopalosiphum nymphaeae, Koch, Passerini. 



Rhopalosiphum alismae, Koch. 



Rhopalosiphum najadum, Koch. 



Aphis butomi, Schrank. 



Aphis aquaticus, Jackson. 



Linnaeus, Syst. Nat., ii, p. 714 (1767), and Fn. Suec, p. 983 (1789) ; Fabricius, 

 Ent. Syst., iv, p 214 (1794), Syst. Rhyng., p. 297 (1803), Mant. Ins., ii, p. 315 (1807) ; 

 Boyer, Ann. Soc. Ent. Fr., x, p. 166 (1841) ; Amyot, Ann. Soc. Ent. France, (2) 

 V, p. 478 (1847) ; Schrank, Fn. Boica, ii, 1, p. 117 (1801) ; Kaltenbach, Mono. Pflanz., 

 p. 104 (1843) ; Walker, Ann. Nat. Hist. (2) v, p. 26 (1850), List Homopt. B. M., iv, 

 p. 984 (1852) ; Koch, Die Pflanz., p. 26, figs. 33-35 (1857) ; Passerini, Aphid. Ital., 

 p. 21 (1863) ; Ferrari, Spec. Aphid. Liguriae, p. 217 (1872) ; Buckton, Mono. Brit. 

 Aph., ii, p. 12, pi. xli (1877) ; Schouteden, Mem. Soc. Ent. Belg., xii, p. 236 (1892) ; 

 Riley, Insect Life, v, p. 236 (1893) ; Osborn & Sirrine, Proc. Iowa Acad. Sci., i, 3, 

 p. 98 (1892) ; Cowen, Bull. Agri. Exp. Sta. Colorado, Tech. Ser. 1, p. 123 (1895) ; 

 Cockerell, Science, xxii, p. 764 (1905) ; Jackson, Ohio Nat., viii, p. 243 (1908) ; 

 Davis, Ent. News, xxi, p. 245 (1910) ; Theobald, Entomologist, xliv, p. 18 (1911). 



Egypt : Gizeh, 5.vi.l914 {F. C. Willcocks). 



Food-plant. Lotus Water Lily. 



Mr. Willcocks found this common water-plant aphid on the upper sides of the leaves^ 

 and on the leaf and flower stalks and flower buds of the lotus Hly. It is common in 

 Europe and America and occurs on Nymphaea lutea, N. alba, Alisma plantago, Potamo- 

 geton natans, Sagittaria sagittifolia, Utricularia vulgaris, Butomus umbellatus, Foste- 

 deria cordata, Hydrocotyle vulgaris, Hydrocharis morsusranae, Lemna gibba, Pontederia, 

 Azolla filiculoides, Marsilea quadrifolia, Salvinia natans. Ranunculus sceleratus, 

 Typha latifolia, Sparganium ramosum, Acarus calamus, Saururus cernus and Menyan- 

 thes trifoliata in Europe. In America also on Philotria canadensis, Nymphaea odorata, 

 Sagittaria variabilis, Najar flexilis, Elodea canadensis, Richardia africana, J uncus sp.,. 

 Calla sp., and Myriophyllum verticillatum. 



