FAMILY TACHIXID.E THE TACHINIDS 423 



24. Aciostical bristles absent Eudejeania Townsend 



Acrostical bristles present (17) Dejeania Brauer & Berj^enstamm 



25. Abdomen convex, the apex rounded 26 



Abdomen very large, unusually flat above, sub-rectangular, the apex 



sti'ongiy emargindte (60) Paradejeania Brauer & Bergenstamm 



26. Second abdominal segment with at most four median marginals, if 



with discals they are arranged in pairs (11, 102) . . ."Archytas Jaennicke 

 Second abdominal segment with many marginals, numerous discals or 

 the pile very long and bristly (95) Jurinia Desvoidy 



27. Ultimate section of fifth vein two-thirds as long as preceding section. 



Metaplagia Coquillett 

 Ultimate section of fifth vein not one-third as long as preceding sec- 

 tion 28 



28. Abdomen without discals, or they are fine and hair-like 29 



Second and third abdominal segments with strong discals. 



Protodejeania Townsend 



29. Face not carinate on lower half of depression 31 



Face carinate on whole length of depression 30 



30. Hair of parafacials inconspicuous. .. .Myiomima Brauer & Bergenstamm 

 Hair of parafacials strong Ursophyto Aldrich 



31. Arista plumose Phalacrodexia Townsend 



Arista bare or pubescent 32 



32. Posterior sublateral bristle present. 



fCnephaliodes Bi'auer & Bergenstamm 

 Posterior sublateral bristle absent; proboscis long, the labellje small. 



Phytopsis Townsend 



33. Frontal bristles not or scarcely extending below the base of the an- 



tennas; arista strongly pubescent or plumose 38 



Frontal bristles usually extending to the base of the third antennal 

 segment; arista not conspicuously pubescent 34 



34. Ocellars present 35 



Ocellars absent JBelvosia Desvoidy 



35. Facial ridges with strong bristles on at least the lower half 37 



Facial ridges with only a few hairs above the vibrissa 36 



36. Eyes pilose (Zenillia submissa A. & W.) Collatia, n. g. 



Eyes bare Parademoticus Townsend 



37. Infrasquamal setulje present Hypochaetopsis Townsend 



Infrasquamal setulae absent Chaetophlepsis Townsend 



38. Arista with long rays 39 



Arista with long rays §Arctophyto Townsend 



39. Infrasquamal setulae absent 40 



Infrasquamal setulae present (Metopiidse) Opsodexia Townsend 



* Cui-ran. 1928. Can. Ent., Ix, p. 202. 



t Rowe, 1931, Ann. Ent. Soc. Amer., xxiv, p. 647 (Fabriciella). 



t Aldrich. 1928. Pr. U. S. N. M.. Ixxiii, Art. 8, pp. 1-45. 



§ Curran, 1924, Can. Ent.. Ivi, p. 302. 



