AFRICAN APFITDIDAE. 



319 



moderate length, much expanded basally, the apical two-thirds with large 

 reticulations, the basal area imbricated ; about two-thirds the length of the 

 cauda. The Cauda is black, longer than the cornicles, narrow and bluntly 

 acuminate, with five hairs on each side and six or seven on the dorsum near 



Fig. 4. — Macro8iphoniella bedfordi, Theo., apterous 9 ! (A) head and antenna ; 



(B) cornicle : (C) cauda. 



the apex ; anal plate dark, with six prominent long chaetae and two or more 

 less distinct. Legs moderately long, tibiae much thinner than the femora ; both 

 femora and tibiae with rather long stiff hairs, denser on the tibiae than on the 

 femora ; the base of the femora and most of the mid area of tibiae paler. 

 Length, 1*5 to 1*8 mm. 



Transvaal : Onderstepoort, 6. iv. 13 (Gerald Bedford). 



Food-plants : Cultivated chrysanthemums. 



This species at first sight resembles Del Guercio's Macrosiphoniella chrys- 

 anthemi* but cannot be conspecific, for the first two antennal segments are 

 markedly unequal and not equal as in that species, and the cornicles are much 

 thicker and more expanded basally. No mention is made of their ornamenta- 

 tion by Del Guercio, nor as to the presence of antennal sensoria in the apterous 

 female, and the antennae in the Transvaal species are longer than the body. 



Rhopalosiphum lactucae, Kaltenbach (The Currant and Lettuce Aphis). 

 Aphis lactucae, Kaltenbach. 

 Rhopalosiphum ribis, Buckton (ncc Linnaeus). 

 Rhopalosiphum lactucae, Buckton, Passerini. 

 Kaltenbach, Mon. Pflanz., p. 37 (1843) ; Buckton, Mon. Brit. Aph. ii, pp. 9-10 

 (1877); Theobald, J. Econ. Biol, vii, pp. 105-107, pi. iii, fig. 2 (1912). 



British East Africa : Njoro, i. 1912 (T. J. Anderson). — Europe generally. 

 Food-plants : Ribes spp. ; Sonckus, Lactuca, Lapsana vulgaris, Pier is 

 hieracioides, and Cichoriinn endivum. 



The African specimens were found on sow-thistles (Sonchus) and agree 

 exactly with British examples. 



* Redia, vii, p. 332, fig. 30 (1911). 



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