AFRICAN APHIDIDAE— PART III. 289 



Fabricius* says of Aphis acetosae, Linn., ' Parvus totus niger fascia viridi. 

 Habitat in Rumice acetosa." 



Bucktonf says of his alate female, " Head and thorax shiny black. Abdomen 

 shining, dark olive-green, with obscure transverse bars " ; and of the apterous 

 female, " dark brown or nearly black " ; he figures the alate female as all black 

 (Plate lxii, fig. 7). 



Miss PatchJ lists Linnaeus' acetosae on Atriplex hortensis (Hunter, 1901, p. 104), 

 and Kaltenbach § records Fabricius' acetosae on Rumex conglomerates ; presumably 

 these refer to Linnaeus' species and not the acetosae of Koch. 



The colour notes were sent me by Mr. Willcocks. 



14. Siphocoryne (Aphis) pseudobrassicae, Davis. 



Canad. Ent., xlvi, pp. 231-234 (1914). 



Professor Davis of Lafayette, Indiana, writes me that he has received this species 

 from Mr. Lounsbury from the Cape. 



It is closely related to Aphis brassicae and can, so far as I can see, be separated 

 from that species only by the alate female having sensoria on segment four of the 

 antennae. 



It is found on radish, turnip, rape, kale, mustard and turnip greens. Davis 

 records it from Geneva, New York ; Evansville, Indiana ; Lafayette, Indiana ; 

 and College Station, Texas. 



The specimens I recorded from turnips from Onderstepoort, Transvaal, as Aphis 

 brassicae (Bull. Ent. Res., iv, p. 320, 1914) show no trace of sensoria on segment 

 four, so are undoubtedly not this species. The other African records I have 

 given refer only to apterae and these evidently cannot be separated in the two 

 species. 



15. Hyalopterus insignis, sp. nov. (figs. 13, 14). 



Apterous viviparous female. — Rich dull brown, covered with white or slightly 

 greyish-white farinose or nocculent secretion, except in certain areas (figure 13) 

 which appear black to the naked eye or low power lens ; this ornamentation is very 

 marked in fresh specimens. Head entirely covered with white secretion ; eyes 

 black. Antennae slightly less than half the length of the body ; the first and second 

 segments dusky ; the third ochreous, dusky towards the apex ; rest of antennae all 

 dusky ; first segment considerably larger than second ; third as long as fourth and 

 fifth, and about as long as the sixth ; fourth and fifth about equal ; third to sixth 

 showing faint imbrication ; basal area of sixth not nearly as long as the flagellum. 

 Proboscis short and thick, only just reaching the base of second pair of legs ; the 

 last two segments nearly equal in length ; the apical one bluntly acuminate. On 

 pro-, meso- and meta-notum a dark central area, remainder (except for narrow 



* Ent. Syst., iv, p. 220 (1794). 



t Monog. Brit. Aphid., ii, p. 81, pi. lxii, figs. 5-7 (1877). 



X Bull. 220, Maine Agric. Exp. Sta., pp. 289-290 (1913). 



§ Die Pflanz. Ins., p. 519 (1874). 



(C419) G 



