26 



34. Chionaspis bilobis Newst. 



BIBLIOGRAPHY : Newstead, Ent. Mon. Mag., xxxi, p. 233 (1895). 



Puparium of adult female, opaque white, somewhat polished, 

 very convex and broadly pyriform, widening considerably immediately 

 behind the second pellicle. Pellicles, pale yellow, usually covered by 

 a thin layer of white secretionary material. 



Length 1-5 millimetres. Breadth 0-75 millimetre. 



HOST PLANTS. 



Umbelliferae Pithyranthus tortuosus. 



REMARKS. 



Our only specimen of this species was kindly given to the collection 

 by Dr. Debski who collected it in 1918 at Helwan on the stems of 

 the above-named plant. 



35. *Chionaspis graminis var. divergens Green. 



BIBLIOGRAPHY : Green, Cocc. of Ceylon, Part ii, p. 123. 



Female puparium snowy white : elongate, moderately dilated 

 behind ; ventral scale well developed, and often coming away un- 

 broken with the dorsal parts. First pellicle very pale transparent 

 fulvous ; anterior margin rather deeply notched ; antennal sheaths 

 usually bent back and lying close along the margin. Second pellicle 

 reddish or fulvous covered by a very delicate layer of secretion ap- 

 pearing as fine white transverse lines ; sometimes, upon very fresh 

 examples, three or more longitudinal white lines are noticeable, more 

 especially in the second stage of the insect. 



Length 2-3-50 millimetres. Breadth 0-75-1-75 millimetres. 



Male puparium snowy white ; elongate, narrow, sides nearly 

 parallel ; rather indistinctly carinate ; at first thickly dusted with 

 powdery secretion which in older examples becomes rubbed off, 

 leaving the puparium quite smooth. Pellicle very pale fulvous, 

 often tinged with brown. Length averaging 1 millimetre (after 

 Green loc. cit). 



My specimens only differ from the above description of Mr. Green 

 in the distinct tricarination of the male puparium in many cases. 



HOST PLANTS. 



Graminese Agrostis alba. 



* Mr. Green has since examined some of my material and points out that it is not quite typical 

 of Chionaspis graminis var. divergent. He suggests that it might be described as a new variety 

 of Chionaspis graminis. The external features agree with var. divergent Green. This description 

 will appear in due course. 



