392 DURHAM DIPTERA. 



LVII. 663. 



106 (107). Palpi large, protruding, and much dilated ; second 



abdominal segment without side bristles. 



{projecta, Beck.) 



107 (106). Palpi normal ; second abdominal segment with 



distinct side bristles. 



108 (111). V.4. bent in a single curve or nearly straight, not 



bent back at the tip. 



109 (110). Hind femora strongly dilated to the tip, then 



suddenly diminishing. (Jatifemorata, Beck.) 



110 (109). Hind femora normal. 



Phora ruficomis, Mg. 

 Bishop Auckland, i $, 25-5-00. 



111 (108). V.4. waved in a double curve, bent back at the tip; 



dorsum sometimes yellow or red-brown. 



112 (113). Abdomen either yellow with black fore margins, or 



black with yellow hind margins ; tip of male 



organ with two strong thorn-like bristles 



beneath. (meigeni, Beck.) 



113 (112). Abdomen usually all black, or only with narrow 



yellow hind margins; male hypopygium with 

 only the usual hairs. (giraudii, Egg.) 



114 (103). Only two scutellar bristles. 



115 (116). Costa short, only reaching the third of the wing; 



ciliation long ; C 1 three or four times as long as 

 C 2 ; colour variable. (2860. fiygmcea, Ztt.) 



116 (115). Costa reaching the middle of the wing. 



117 (137). Costal ciliation long. 



118 (119). Fourth abdominal segment ivory-white; 1 mm. 



{zonata, Ztt. $) 



119 (118). Abdomen entirely black. 



120 (121). Basal half of the hind femora with long ciliation 



beneath ; male abdomen almost bare. 



(sordida, Ztt.) 



121 (120). Hind femora not ciliated beneath. 



122 (123). Male abdomen with long erect scale-like hairs ; 



hind tibia? not ciliated. 



2864. Phora rufipes, Mg. 

 Common. 



