AFRICAN APHIDIDAE— PART III. 279 



second ; third longer than fourth and a little shorter than sixth ; fourth a little 

 longer than fifth ; sixth with basal area nearly twice as long as the short blunt nail- 

 like flagellum ; sensoria on fifth and sixth normal ; third to sixth imbricated. Eyes 

 large. Proboscis reaches to second coxae. A marked papilla on each side between 

 meso- and meta-thoracic legs and two (?) pairs of lateral abdominal papillae. 

 Cornicles dark green, thick, rather short, slightly expanding basally, broad at apex ; 

 showing very faint imbrication ; not quite so long as the cauda. Cauda dark green, 

 acuminate, spinose, with four pairs of lateral hairs, the apical pair curved inwards, 

 at some little distance from apex and arising from marked tubercles. Anal plate 

 small. Legs rather thick ; tarsi and apices of tibiae darkened ; tibiae with a few 

 short hairs. In some the cornicles are thicker and shorter than in others and 

 consequently much shorter than the cauda. Four short hairs on the frons. 

 Length, 1-1*2 mm. 



Egypt: Ghizeh, 26. v. 10 (F. C. Willcocks). 



Food-plant. — Tamarix sp. 



Described from a number of apterous and two alate females preserved in spirit. 

 The specimens had retained a more or less greenish hue, but definite colours cannot 

 be given. It is a very marked species; however, easily distinguished by the structure 

 of the antennae, especially by the shortness of the flagellum and by the small 

 number of sensoria on the third antennal segment of the alate female. Wing 

 venation very erratic. Cauda long compared with the rather short, thick cornicles. 

 The only species recorded from this plant. 



6. Aphis bauhiniae, sp. nov. (fig. 6). 



Alate viviparous female. — Head dark brown ; thoracic lobes black ; rest of body 

 green. Sternal thoracic plates black. Proboscis pale. The green abdomen is 

 darkened in the middle and has three pairs of black lateral spots. Cornicles brown. 

 Cauda pale. Antennae pale, except just at the apex. Fore and mid femora pale ; 

 hind pair dusky ; apices of tibiae and tarsi dark. Antennae not so long as the body ; 

 first segment a little wider than second ; third longer than fourth, but shorter than 

 sixth, with four to seven round sensoria, more or less equally separated ; fourth 

 segment of about the same length as fifth ; sixth longer than four and five, its basal 

 area rather less than one-third the length of the flagellum ; third to sixth imbricated. 

 Head rather flattened in front. Eyes large. Proboscis reaches to the second coxae ; 

 apical segment longer than the penultimate. Cornicles longer than cauda, slightly 

 widened basally ; imbricated. Cauda projecting well beyond the cornicles, spinose, 

 with three pairs of lateral hairs. Anal plate spinose, with a few long apical hairs. 

 A papilla on each side of pronotum ; also one between the meso- and meta-thoracic 

 legs and some on abdomen. Wing veins rather pale. Length, 1—1*5 mm. 



Apterous viviparous female- -*-Green and mottled green. Cornicles dark greenish- 

 brown. Cauda greenish, somewhat darker than body ; apex of antennae dusky, 

 also apex of tibiae and the tarsi dark. Antennae not quite so long as the body ; 

 basal segment wider than the second ; third a little longer than fourth ; not so long 

 as the sixth ; fourth and fifth equal ; apex of fifth and all the sixth darkened ; 



