4 PROCEEDINGS OP THE NATIONAL MUSEUM vol.66 



8. Puparium with posterior cavity located above or below the horizontal 



axis 9 



Puparium with posterior cavity located on the horizontal axis 10 



9. Posterior cavity distinctly below the horizontal axis ; spiracular plate 



rounded with a definite extension on the outer edge. 



No. 7, Sarcophaga eleodis Aldrich. 

 Posterior cavity distinctly above the horizontal axis; spiracular plate with- 

 out an extension: slits short and nearly straight. 



No. 8, Sarcophaga opifera Coquillett. 



10. Posterior cavity quite round with the edge flattened. 



No. 9, Sarcophaga subaenescens Aldrich. 

 Posterior cavity not as above 11 



11. Posterior cavity extremely small 12 



Posterior cavity very large 13 



12. Posterior end of puparium slightly tuberculate ; spiracular plates with three 



distinct lobes ; slits short, broad, pointed apically. 



No. 10, Sarcophaga hunteri Hough. 

 Posterior end of puparium more broadly tuberculate. with three segments a 

 little indefinite; lobes smaller, slits short and narrow. 



No. 11. Sarcophaga atlanis Aldrich. 



13. Posterior cavity extremely large 14 



Posterior cavity medium sized to large 15 



14. Posterior cavity located centrally on horizontal axis ; last two segments 



visible; spiracular plate rounded; slits narrow; two inner ones very long, 



outer slit noticeably shorter No. 12, Sarcophaga fuscicauda Buttcher. 



Posterior cavity slightly quadrate (especially at base) ; spiracular plate with 

 three broad slits ; the plate has a broad extension on the upper and outer 

 edges No. 13, Sarcophaga sternodontis Townsend. 



15. Posterior cavity large 16 



Posterior cavity medium sized 17 



16. Posterior cavity slightly semicircular, with yellowish pointed tubercles on 



the edge; spiracular plates with three narrow, nearly straight slits. 



No. 14, Sarcophaga australis Aldrich. 

 Posterior cavity iri-egularly rounded, with greater portion below the hori- 

 zontal axis ; spiracular plate large, with three large lobes, each lobe with 

 a long, broad slit No. 15, Sarcophaga sarracenioides Aldrich. 



17. Posterior spiracular plate without definite lobes 18 



Posterior spiracular plate with definite lobes 19 



18. Posterior cavity elliptical ; located centrally on horizontal axis, edge of 



cavity with indications of tubercles; below the cavity is a definite out- 

 lined rounded area containing two rounded tubercles ; spiracular plate 

 about as broad as long; slits broad, pointed at the base. 



No. IG, Wohlfahrtia vigil AValker. 



Posterior cavity elliptical, with only the lower edge of the cavity touching 



the horizontal axis; spiracular plate with three very broad slits pointed 



at the base No. 17, Sarcophaga aculeata Aldrich. 



19. Spiracular plate with a tuberculate projection on the inner edge ; plate 



rounded with three curved slits No. 18, Sarcophaga singularis Aldrich. 



Spiracular plates not as above 20 



20. Spiracular plates with a small narrow ridge in addition to the main 



lobes - 21 



Spiracular plates without the above ridge 22 



