ILLUSTRATIONS 



PLATES. 



Page. 



Plate I. Fig. 1 . — Musca domestica: Side view 38 



2. — Musca domestica: Posterior stigmal plates 38 



3. — Musca domestica: Tip of body 38 



4. — Musca domestica: Head from above 38 



5. — Lyperosia irritans: Tip of body 38 



6. — Lyperosia irritans: Head, side view 38 



7. — Lyperosia irritans: Posterior stigmal plates 38 



8. — Stomoxys calcitrans: Anterior si:)iracle 38 



9. — Stomoxys calcitrans: Posterior stigmal plate 38 



10. — Stomoxys calcitrans: Cephalopharyngeal skeleton 38 



11. — Pseudopyrellia cornicina: Tip of body 38 



12. — Pseudopyrellia cornicina: Anterior spiracle 38 



13. — Pseudopyrellia cornicina: Head, side view... 38 



14. — Pseudopyrellia cornicina: Head, top view 38 



15. — Pseudopyrellia cornicina: Stigmal area 38 



16. — Musca domestica: Anterior spiracle 38 



II. Fig. 17:— Muscina stabulans: Stigmal plates 38 



18. — Muscina stabulans: Tip of body, side view 38 



19. — Muscina stabulans: End of body 38 



20.— Muscina assimilis: Tip of body, side view 38 



21. — Muscina assimilis: Stigmal plates 38 



22. — Muscina assimilis: End of body 38 



23. — Near Muscina: Last two segments 38 



24. — Near Muscina: Anterior spiracle 38 



25. — Near Muscina: Head, above 38 



26. — Near Muscina: Stigmal plate 38 



27. — Muscina stabulans: Head, side view 38 



28. — Muscina stabulans: Anterior spiracle 38 



29.— Muscid C: Tip of body, side view 38 



30.— Muscid C: Stigmal plates 38 



31. — Muscid C: Anterior spiracle 38 



32.— Muscid C- End of body 38 



83.— Muscid A: Tip of body, side view 38 



34.— Muscid D: End of body 38 



35. — Muscid D: Anterior spiracle 38 



36. — Muscina stabulans: Head, above 38 



37.— Muscid A: Stigmal plate 38 



38. — Muscid A: Anterior spiracle 38 



III. Fig. 39. — Chrysomyia {?): Tip of body, side view 38 



40. — Muscid B: Anterior spiracle 38 



41. — Muscid B: Tip of body, side view 38 



42.— Muscid B: Stigmal plates 38 



43.— Muscid B: End of body , 38 



