20 



TlIK SCOTTISH NATUKAUST 



TiiK ruPAKiUAi (Fig. 8). — Length 7 to 8 mm. Oblong 

 oval or almost cylindrical, somewhat conical at the anterior 

 end and blunter at the hind end. Bright golden brown when 

 wet, dull pinkish brown when dry ; often much darker 

 towards the extremities. Segments more clearly defined at 

 the sides than on the ventral and dorsal aspects. On the 

 dorsal surface the segmentation is only faintly traceable. 

 Cuticle thin, and little wrinkled. Prothoracic spiracles of the 

 larva still conspicuous as blackish ridges. Posterior tubercles 

 and anal lips clearly discernible. 



.-/ ■ 



^ 



f.fi.H 



Fig. 5. — Three anterior segments of 

 mature larva, ventral asptct, to 

 s!iow position of antenna; and 

 sensory spots. 





■:*^ 





J J!.) 



Fig. 7. — Posterior face of ultimate 

 segment of mature larva, show- 

 ing tubercles and posterior stig- 

 mata. 



Fig. 6. — Prothoracic spiracle of 

 mature larva. (Greatly magni- 

 fied ; camera lucida drawing.) 



■T MM ^tf 



Fig. S. — Puparium of Hyleinyia 

 "risea. 



As regards the life cycle of Hyleuiyia grisea, there is one 

 generation in the year, and the winter is passed in the pupal 

 stage. I found flies in June and July; eggs in July; larvae 

 in July and August; and puparia in September, October, 

 November, December, January, February, March, April and 

 May. 



In concluding this paper I wish to acknowledge my 

 indebtedness to Dr R. Stewart MacDougall for his constant 

 kindly interest and many helpful suggestions. 



