276 FRED. V. THEOBALD. 



with femora of first and second pairs greenish ochreous ; tibiae ochreous, dark at 

 apex ; tarsi dark ; hind femora with apical half dusky ; tibiae as in the anterior 

 legs. Antennae not as long as the body ; first segment larger than second ; third 

 about as long as the sixth, with 7-8 circular sensoria ; fourth longer than fifth, 

 with 3-4 sensoria ; fifth with normal subapical sensorium ; basal area of sixth half 

 the length of the flagellum ; the usual sensoria at apex of basal half ; all the segments 

 imbricated. Proboscis reaching to third pair of legs ; acuminate. There are lateral 

 abdominal papillae, one pair caudad of the cornicles and two pairs close together 

 cephalad of them. Cauda as long as cornicles, spinose, with three pairs of lateral 

 hairs, the apical pair curved inwards. Anal plate spinose, with a few long apical 

 hairs. Cornicles rather short, slightly expanding basally, apparently spirally ringed 

 up to nearly the apex, which is unadorned. Legs normal, with a few short hairs on 

 the tibiae. Length, 1*8-2 mm. 



Apterous viviparous female. — Yellowish green, mottled with darker shades of green. 

 Antennae of the same colour as the head, but apex of fifth and whole of sixth 

 segments are dusky. Eyes dark reddish-brown. Cornicles yellowish green, dusky 

 at apex. Legs yellowish green ; tibiae with apices shaded ; tarsi dark. Cauda 

 yellowish green. Antennae shorter than body ; basal segment larger than second ; 

 third longer than fourth and about as long as sixth ; fourth longer than fifth ; basal 

 area of sixth half the length of the flagellum ; sensoria on fifth and sixth normal. 

 Cornicles moderate in size, slightly expanding basally, imbricated. Cauda nearly as 

 iong as the cornicles, spinose, with three pairs of lateral hairs, the apical pair curved 

 inwards. A large lateral papilla between the prothoracic and mesothoracic legs. 

 Length, 1*5-2 mm. 



Egypt: Gizeh, 31.xi.10 (F. C. Willcocks). 



Food-plant. — Zizyphus spina-christi. 



Mr. Willcocks found this species swarming on the end portions of the young shoots 

 of Zizyphus which had grown up from the base of the trunk and also on any young 

 growth on the trees. 



Zizyphus is a genus of the Rhamneae or buckthorn tribe. Zizyphus spina-christi 

 occurs in Asia and North Africa, including Egypt. 



4. Aphis ficus, sp. nov. (fig. 4). 



Apterous viviparous female. — Head, thorax and abdomen a pale bright apple- 

 green. Eyes very dark red to reddish brown. Antennae with the first and second 

 segments of the same colour as the head ; the third to fifth segments pale ; the sixth 

 smoky. Legs very pale yellowish or yellowish green ; tarsi and tips of the tibiae 

 shaded dusky. Cornicles of the same colour as the body, but the tips smoky. Cauda 

 yellowish green. Antennae not so long as the body ; the first segment larger than 

 the second ; the third longer than the fourth, about as long as the sixth ; fourth 

 and fifth about equal in length ; the fifth with the usual subapical sensorium ; basal 

 area of the sixth about one-third the length of the flagellum. Cornicles more or less 

 cylindrical, with irregular transverse striae, showing a dotted appearance. Cauda 

 about as long as the cornicles, spinose, with three pairs of lateral hairs. Anal plate 

 spinose, with some long apical hairs. Length, 1*8-2 mm. 



