316 Scientific Proceedings., Royal Dublin Society. 



EXPLANATION OF PLATE. 



Larva and Puparium of Oscinis frit. 



Fig. 



1. Fully grown Maggot. Lateral view, in., mouth ; /., feelers ; a. sp,, anterior 



spiracles, a. p., anal proleg ; jj. SjJ., posterior spiracles, x 30. 



2. Head region of macggot. Lateral view. /., feelers ; sp., spines ; r., thickenings 



of cuticle. X 50. 



3. Anterior segments of young maggot. Ventral view, cleared, showing 



c. sk., eephalopharyngeal skeleton (somewhat displaced); /., feelers; 

 a. sp., anterior spiracles ; Z. p., lateral plates, x 100. 



4. Small head prominence, x 620. 



5. Lateral view of mouth-hooks, and part of eephalopharyngeal skeleton. 



TO. h., mouth-hook ; h. s., hypostomal selerite ; jj. s., parastomal sclerites ; 

 .s., small lateral selerite. x 430. 



6. Parastomal sclerites. Ventralview. x 430. 



7. Anterior spiracle (a), x 210. (b) spiracular opening, x 620. 



8. Posterior spiracles, x 100. 



9. Posterior spiracle, th., thickenings of cuticle, x 620. 



10. Anal prolegs and anus (a), x 50. 



11. Puparium. Ventral view. Outline of pupa visible within, p. s., posterior 



spiracles, x 45. 



