oq 



6/ 



PART OF PLANT ATTACKED. 

 The blades of the grass. 



* 



REMARKS. 



This species was collected beside the Cairo-Helwan road and 

 at Ma'adi. It will probably prove to be of wide distribution. 



36. Chionaspis striata Newst. (THE SNOW SCALE). 

 (Flos. 1, la, 16, Ic) 



BIBLIOGRAPHY : Newstead, Trans. Ent. Soc. Lond., p. 96 (1897). 



The female puparium is highly convex and usually widely pyri- 

 form. It is either a shining satiny-white or a dull opaque white 

 and often faintly striated transversely, but this is not always the 

 case. The pellicles are pale yellow to ochreous. The adult female 

 is pale yellow. 



The male puparium is white, of typical form, often transversely 

 striated and faintly tricarinate. Pellicle pale yellow. 



Length of female puparium 1-2 millimetres. Male puparium 

 1 millimetre. 



My microscopic preparations of this species show constant pygidial 

 features and differ considerably from those figured by Newstead in 

 his original description (loc. cit.}. The following is the description 

 of the microscopic characters of the adult female as it occurs in this 

 country. 



Adult female elongate, ovate ; rostral filaments short ; anterior 

 spiracles with two parastigmatic glands. Abdominal segments without 

 squames but with minute pores on the ventral surface and a group 

 containing from two to five comparatively large drawn out tubercles. 

 Pygidium broadly rounded with median and first lateral lobes only . 

 Other lobes wanting. The median lobes are small, somewhat elongate, 

 free, bluntly rounded, but in some specimens the extremities of the 

 lobes are more pointed. The lateral lobes are stout and slightly 

 shorter than the median lobes. There is a squame situated between 

 the median and lateral lobes close to the median lobe and one just 

 beyond and close to the lateral lobes. Marginal pores large, seven 

 or eight in number on either side of the median lobes. Conspicuous 

 series of dorsal pores arranged in three broken arches. There is a 

 certain amount of variation in the number of pores in these series. 

 Circumgenital glands in five groups showing considerable variation : 

 median 2-8, anterior laterals 6-13, posterior laterals 7-18. 



HOST PLANTS. 



Coniferse Oupnnu sp., Thuja sp. 



