AFRICAN APHIDTDAE. 



317 



sixth imbricated. Cornicles cylindrical, slightly swollen at the base, black, 

 thick, longer and thicker than the third antennal segment and much longer than 

 the cauda, marked with fine dark specks, scarcely to be called imbrication ; 

 canda black, spinose, bluntly acuminate, dilated basally, with three pairs of pale 

 lateral chaetae (one shows a fourth on one side). Length, 2 to 2*5 mm. 



Fig. 3. — Macrosiphum neavel, Theo., apterous 9 ; (A) head and antenna ; (B) cornicle ; 



(C) cauda ; (D) body hairs. 



Nymph. — Very similar to the apterous female, the wing-buds dark brown. 

 Length, 2 to 2*5 mm. 



Nyasaland : Mlanji, iv. 1913 (S. A. Neave). 



Described from two apterous females and some nymphae. No food-plant is 

 recorded. The ornamentation of the cornicles is very marked. 



Macrosiphum antirrhinum, Macchiate. 



Siphonophora anterrhinum, Macchiate. 



Macchiate, Ann. Soc. Ent. Ital. xv, p. 228 (1883); Theobald, Journ. Eco. 

 Biol, viii, p. 151-153, fig. 59 (1913). 



British East Africa : Njoro, 16. i. 12 (T. J. Anderson). 



Food-plants : Antirrhinum spp. (cultivated). 



The only other records are Italy {Macchiate) and Glasgow, Scotland (Af/ar). 



Mr. Anderson obtained the alate Q and many apterae. No alate females 

 have occurred in Britain, yet Mr. Agar, of Glasgow University, has bred this 

 Aphis all the year. 



Macrosiphum granarium, Kirby (The European Grain Louse). 



Aphis gr anuria, Kirby. 



Aphis cerealis, Kaltenbach. 



Siphonophora cerealis, Koch. 

 Kirby, Trans. Linn. Soc. iv, p. 238 (1798) ; Curtis, Journ. Roy. Soc. 

 Agric. vi. ; Kaltenbach, Mon. Pflanz. p. 16 (1843) ; Koch, Pflanzenlause, p. 186 

 (1857); Buckton, Mon. Brit. Aph. i, p. 114, pi. vi (1875); Pergande, Bull. 

 44. U.S. Dept. Agric. Div. Ent. pp. 13-21 (1904); Theobald, Journ. Eco. 

 Biol, viii, pp. 58-61, figs. 283 (1913). 



