1 34 Chionaspis. 



CHIONASPIS POLYGONI, sp. nov. 

 (Plate XLIV.) 



Female puparium white, more or less tinged with reddish brown {fig. 3) from 

 adherent particles of the membranous stipules of the plant, beneath which the 

 scales are often concealed. Sometimes the whole scale is covered in this 

 manner {fig. 4). Secretionary area thin and transparent ; usually dilated 

 behind. Pellicles very pale straw colour. Ventral scale remaining attached to 

 the plant as a delicate whitish film. Length 2 to 3 mm. Breadth about 

 I '50 mm. 



Male puparium {fig. 2) of normal form ; slightly widened behind. Carinse 

 smooth and not very prominent. Length r2 5 mm. 



Adult female {fig. 5) at first yellow, deepening to reddish orange during 

 gestation. Position of stigmata and circumgenital glands marked by white 

 waxy patches. Median area (including meso- and metathorax and first two 

 abdominal segments) broadest. Segments well defined. Both pairs of spiracles 

 with parastigmatic glands. Second and third abdominal segments each with 

 ten to twelve stout spiniform squames on margin. Pygidium {fig. 6) broad. 

 Median lobes large and prominent, bluntly conical ; inner edge sub-parallel at 

 base, then widely divergent and minutely serrate ; outer edge with small in- 

 conspicuous lobule. First and second lateral lobes duplex, of about equal size ; 

 both lobules bluntly pointed {fig. 6), or mesal lobule slightly dilated towards 

 extremity {fig. 7). The pore-bearing prominence on second and third spaces 

 strongly developed. Squames large and stout ; one on each of first to 

 fourth spaces, and five to seven on base. A series of conspicuous oval pores on 

 each of fourth and basal spaces, and a similar series on third abdominal 

 segment. Circumgenital glands in five groups ; orifices numerous : median 

 12 to 19; upper laterals, 35 to 40; lower laterals, 27 to 35. Anal slightly 

 anterior to genital aperture. Length averaging r25 mm. Greatest breadth 

 about 075 mm. 



Adult male bright red. Rudimentary eye-spot on gense rather prominent. 

 Foot with three digitules (one ungual, two tarsal). Terminal joint of antenna 

 with a stout knobbed hair at apex as long as the joint, and a small sub-apical 

 tubercle bearing two small spines. Genital sheath about one-third the length 

 of the body. Total length 1*50 mm. 



Eggs numerous, dull pale orange. 



Habitat on stems on Polygoiium cJiinense. Pundaluoya. At first concealed 

 beneath the membranous stipules, but afterwards exposed by the extension of 

 the stem during growth {fig. i). 



This species in many characters closely approaches the American insect 

 Ch. lintnerij but Mr. W. A. Cooley, who is well acquainted with the latter 

 species, and who is making a special study of the genus Chionaspis, assures me 

 that they are quite distinct. Ch. lintneri may be distinguished by the presence 



