AFRICAN APHIDIDAE — PART II. 141 



and tkorax yellowish, venter of a greenish, hue. There are two fleshy tubercles or 

 processes on the dorsal surface of the penultimate segment. Body much flattened. 

 Some are paler than others and the dusky areas are more intense." — F. C. W. 



Pale yellowish-brown in spirit, speckled with black on the dorsum ; dorsal Hue 

 paler than the rest of the body and with three pairs of more pronounced black spots 

 on the thorax. Head large, flattened in front ; the sides long, straight, slightly 

 diverging, with short, thick, sickle-shaped lateral hairs ; the frons in some examples 

 seems to be slightly projecting in the middle. Eyes large and black. Proboscis 

 short, not reaching the second pair of legs. Antennae as long as or rarely sUghtly 

 longer than the body, thin, of six segments ; the first a httle longer and wider than 

 the second ; the third the longest ; fourth and fifth nearly equal ; the sixth longer 

 than the fifth, its basal area long, more than one-half the length of the flagellum ; 

 a single sensorium near the apex of the fifth and one at the junction of the basal area 

 and flagellum of the sixth ; apex of the third and all the fourth, fiith and sixth dark 

 brown, the last three spinose and annulated. Thorax large and only a Httle wider 

 than the head ; prothorax large ; mesothorax still larger ; all three segments 

 sharply defined. Abdomen narrow, of the same width as or slightly wider than the 

 thorax ; the segments well defined, especially those behind the cornicles ; covered 

 with large expanded hairs, some expanded apically, others sickle-shaped. Cornicles 

 short, cup-shaped to bluntly tubular, pale, with fine speck-hke ornamentation. 

 Cauda pale, of somewhat similar form to that in the alate female, with some 

 long hairs, which are shghtly capitate ; some hairs at the apex of the abdomen long 

 and simple or shghtly capitate, arising from prominent tubercles. Lengthy 2-2-5 mm. 



Egypt : Ghezireh, S.v.lO {F. C, Willcocks). 



Food-plant. Sedges (Scirpus). 



This very marked aphid is described from a number of apterous females and two 

 alate females. It is not only of very peculiar form and structure, but also is particu- 

 larly noticeable on account of its jumping habits in the apterae. I have placed it 

 in a new genus, as I know of no aphid with such an enlarged head or with similar 

 venatior in the hind wings. Mr. Willcocks describes it as a very shy species, and 

 says that the antennae are held out in front of the head, resting on the surface of the 

 leaf when the insect is at rest. It springs from the plants on the shghtest alarm, 

 and then moves to some httle distance. 



Anoecia willcocksi, sp. nov. (figs. 30, 31, 32). 



Alate viviparous female. — Black and green. Head black, dull ; hairs pale ; eyes 

 black. Antennae black or deep sepia-brown. Thorax black, with a few pale hairs. 

 Abdomen pale green, with conspicuous deep sepia-brown markings (black to naked 

 eye), viz., 2 sepia bars at base of abdomen ; from the middle area to cornicles a large, 

 very deep sepia, almost black, area ; two bars of same colour posterior to it ; five 

 pairs of dusky lateral spots in front of cornicles. Rings of cornicles black and shiny. 

 Legs black, hairs pale ; first femora ochreous at base. Venter green, farinose ; under- 

 side of head and thorax dull black. AVing insertions dusky, also veins. Head 

 rounded in front, with rather long hairs. Eyes large and prominent ; stemmata 

 marked. Antennae as long as head and thorax ; first two basal segments nearly equal, 

 or first slightly larger ; third longest, with 8 to 10 slit-like sensoria ; fourth a little 



