Chionaspis. 127 



CHIONASPIS ARUNDINARI^, sp. nov. 

 (Plate XL.) 



Female puparium {fig. 3) whitish, very faintly tinged with ochreous ; of 

 irregular outline, usually broadest immediately behind the second pellicle. 

 Total length not greatly exceeding breadth. Secretionary area completely 

 surrounding second pellicle ; often marked with furrows and ridges from the 

 prominent ribs of the leaf. First pellicle very pale ochreous. Seen by trans- 

 mitted light {fig. 4), the disc appears to be covered with small opaque gland- 

 like spots, arranged in definite transverse lines on the posterior half; margin 

 set with stout curved spines. Second pellicle ochreous, darker and more opaque 

 towards margin and hinder extremity ; very irregular in form {fig. 5). Total 

 length V2$ to 1*50 mm. Breadth i mm. 



Male puparium {fig. 2) white ; very thin and delicate ; faintly carinate ; 

 sides sub-parallel. Pellicle pale ochreous, with opaque spots and marginal 

 spines. Length i mm. 



Adult female {fig. i) oblong, broadest across mesothorax ; bright pale 

 yellow. Margins of meso and metathorax with one or two small conical tubular 

 processes. Spiracles without definite parastigmatic glands. Abdominal seg- 

 ments without dorsal pores or marginal squames. Pygidium {fig. 6) with a 

 slight median indentation. Median lobes rather small, divergent, pointed, their 

 free edges irregularly dentate. First lateral lobes duplex, very minute and 

 inconspicuous. Other lobes obsolete. Squames large and prominent ; one on 

 each of the first to fourth spaces, none on base. Series of oval dorsal pores on 

 third, fourth, and basal spaces. Circumgenital glands in five lax groups : 

 median, 3 to 4 ; upper laterals about 6 ; lower laterals about 8. Anal slightly 

 anterior to genital aperture. Length about 075 mm. Greatest breadth 

 0*40 mm. 



Adult male not known. 



Habitat on under surface of leaves of bamboo {Arundinaria sp). Kelani 

 Valley, Udagama. 



A small and inconspicuous species. Allied to elongaia, but easily dis- 

 tinguished by the form of the scale. 



EXPLANATION OF PLATE XL. 

 Chionaspis arundinaria. 



Fig. I. Adult female, ventral view. 



2. Male puparium, from above. 



3. Female puparium, from above. 



4. „ „ first pellicle. 



5. „ „ second pellicle. 



6. Pygidium of adult female, dorsal view. 



7. Margin of metathorax, with tubular processes. 



