ABT. 10. PUPARIA OF 100 MUSCOID FLIES GREENE, 9 



19. Apical segment narrow, of equal width. 



(No. 62) Chaetogaedia analis "Van der Wulp. 



Apical segment hemispherical (No. 63) Archytas analis Fabricius. 



Apical segment much wider below (No. 64) Archytas hystrix Fabricius. 



20. Puparium obliquely flat on posterior end ; stigmal plate with three long slits. 



(No. 65) Archytas lateralis Macquart. 

 Puparium not as above 21 



21. Bottom slit about horizontal 22 



Bottom slit not horizontal 23 



22. The three slits of equal length (No. 66) Gonia capitata de Geer. 



The upper slit much longer than either of the other two. 



(No. 67) Gonia exul Williston. 



23. Stigmal plates round; a large, prominent, transverse elevation below the 



stigmal plates (No. 68) Blepharipeza adusta Loevv. 



Stigmal plates not round 24 



24. Stigmal plate elliptical or oval ; slits narrow. 



(No. 69) Masicera eufitchlae Townsend. 

 Stigmal plate not as above 25 



25. Stigmal plates small, subdorsal ; two short ridges, with a groove between 



them vertically between the plates. 



(No. 70) Linnaemyia comta Fallen. 



Stigmal plates larger, not subdorsal 26 



2G. Upper slit horizontal, other two slits pointing obliquely downward ; button 



near upper edge of plate (No. 71) Peleteria robusta Wiedemann. 



Not as above 27 



27. Puparium with a prominent elevation at base of stigmal plates 28 



Puparium without such elevation 29 



28. A large transverse elevation below the stigmal plates, extending up narrowly 



between them (No. 72) Tachina mella Walker. 



Elevation rounded, depressed in center; at base of plates oniy. 



(No. 73) Euphorocera claripennis Macquart. 



29. Puparium quite small 30 



Puparium medium to large size 32 



30. Stigmal plates elliptical; slits small and the ridges narrow. 



(No. 74) Hypochaeta longicornis Schiner. 

 Stigmal plates not elliptical; slits and ridges large 31 



31. Stigmal plates widely separated ; an elevation ^elow and between plates ; 



anal opening remote from stigmal plates. 



(No. 75) Phorocera tortricis Coquillett. 



Stigmal plates contiguous ; no elevation below plates ; anal opening much 



nearer stigmal plates (No. 76) Phorichaeta sequax Williston. 



32. Stigmal plates somewhat flattened ; slits and ridges very small, on the outer 



edge; button large, round (No. 77) Dichaetoneura leucoptera Johuson. 



Stigmal plate not as above 33 



33. Inner slits and ridges noticeably larger than the others 34 



Slits nearly equal in size 35 



34. Two lower slits nearly parallel (No. 78) Tachina rustica Meigen. 



Two lower slits not parallel (No. 79) Tachina robusta Townsend. 



35. Slits faintly elevated ; ridges indistinct 36 



Slits located on ridges 42 



36. Slits small, close together 37 



Slits larger, remote 38 



37. Stigmal plate broader above; puparium not very long. 



(No. 80) Masicera myoldea Desvoidy. 



