2l6 DURHAM DIMERA. 



XXXI. 



109 (HO). Cheeks below, near the eye margins, with a few 



large bristles. Rhinophora, Dsv. (409) 



110 (109). Cheeks without these bristles. 



111 (114). Third antennal joint at least twice as long as the 



second, but generally many times longer. 



112 (113). Facial bristles placed on the facialia. 



385. Anach^etopsis, Br. & Berg. 

 (1801. ocyftterina, Ztt.) 



113 (112). Facialia bare, the row of bristles placed on the 



cheeks continuing the fronto-orbital row. 



PHORicHiETA, Rnd. (386) 



114 (111). Third antennal joint scarcely longer than the second. 



115 (116) (117). X.5 2 very near to X.4. Stevenia, Dsv. (407) 



116 (115) (117). X.5 2 at the middle between X.4. and the 



bend of V.4. 



399. Psalida, Rnd. (1825. simplex, Fin.) 



117 (115) (116). X.5 2 nearer to the bend of V.4. than to X.4. 



Phyto, Dsv. (406) 



118 (1). Arista distinctly hairy, and mostly plumose (III. 50). 



119 (128). Arista bare on the tip half (III. 50) ; abdominal 



bristles (macrochaetae) present at least on the 

 two last segments. 



120 (121). Outer side of the tibiae with a row of regular and 



very strong bristles. 



418. Theria, Dsv. (1880. muscaria, Mg.) 



121 (120). Outer side of the tibiae with at most long thin hairs, 



or with isolated bristles, but not a regular row. 



122 (123). Frons very broad, and nearly equally so in both 



sexes ; arista generally short plumed. 

 417. Sarcophila, Rnd. (1879. lattfj-ons, Fin.) 



123 (122). Frons of the male always smaller than that of the 



female ; arista long plumed. 



124 (125). Grey species ; cheeks below near the eye-margins 



with a row of distinct little bristles; facialia, 

 above the strong mouth-bristles, with at most 

 two or three little bristles, but as a rule bare. 



Sarcophaga, Mg. (416) 



