THE COCCIDAE OF SOUTH AFRICA. — III. 237 



" Puparium of male white, with a sharply defined median ridge, sides rounded. 



" Female, adult. Subpyriform, widening considerably in the region of the 

 free abdominal segments ; gradually and widely rounded posteriorly ; narrowest 

 in front. Rudimentary antennae with one long curved spine and two very short 

 ones. Anterior stigmata with 4 parastigmatic glands ; posterior pair without 

 glands. Circumgenital glands in five groups, formula of two examples : — 



9 8 



14 12 12 12 

 14 15 13 14 



Anal orifice opposite the lower lateral groups of spinnerets. Fringe of pygidium 

 [fig. 158] almost denuded of appendages ; median lobes very short, broad, with 

 the inner margins touching, so that in some examples they appear as if fused. 

 There is a single long spine on either side of the lobes and beyond them one or 

 two smaller ones. Dorsal pores numerous and extending to the margin. 



" Closely allied to Chionaspis nudata, Newst., but easily distinguished from this 

 species by the form and position of the median lobes and also the shape of the 

 adult female. 



" Habitat : Sudwestafrika, Groot Namaland, Brukkarossberg, August 1905, 

 Dr. L. Schultze. On an unknown plant called Lobarus." (Newstead). 



144. Chionaspis mytilaspiformis, Newst. (Plate xvi, fig. 161). 



Chionaspis mytilaspiformis, Newst., ZooL Anthr. Ergeb. Westl. Zentr, Sudafr. 

 p. 19, 1912. 



" Puparium of female. Form closely resembling that of the common Mytilaspis 

 pomorum., when fixed to the slender stem of its food -plant ; a few forms are, however, 

 more or less straight, but all are highly convex. Length, 2 to 2 "25 mm. 



" Female, adult. Very elongate, narrowest in front. Antennae with two long, 

 stout, curved spines and a minute central one. Anterior stigmata with 4 to 5 

 parastigmatic glands ; posterior pair without glands. Abdominal and thoracic 

 segments with large groups of dorsal glands. Pygidium with five groups of circum- 

 genital glands, the anterior groups represented generally by a few isolated spinnerets. 

 Formula of three examples : — 



1 4 7 



12 10 13 11 10 8 

 28 29 30 30 26 23 



" Anal orifice opposite the anterior group of spinnerets. Margin of pygidium 

 [fig. 161] : median pair of lobes generally well developed, anterior edge irregularly 

 and coarsely serrate ; second pair quite rudimentary or sometimes obsolete ; third 

 pair absent. Squamae spiniform, long. Spines long, slender. Dorsal glands in 

 large and well-marked groups or bands. 



" I had, at first, thought that this insect might prove to be Maskell's C. natalensis. 

 It certainly bears no resemblance to his extremely poor figure, neither does it agree 

 with his diagnosis. It evidently belongs to the African group, and is nearly related 

 to G. nerii, Newstead. The latter has, however, a much longer second pair of 

 lobes, and the anterior group of circumgenital glands are much more numerous. 



