DURHAM DIPTERA. 389 



LVII. 663. 



55 (54). Costa only extending to the middle of the wing; fork 



of V.3. long and very acute at the base ; size 

 3| mm. {aptina, Schin. $) 



56 (53). Scutellum with four bristles. 



57 (57a) (58). Palpi orange ; abdomen orange, often black in 



the male. 



(2855. abdominalis, Fin. =2873. ftorea, F. ?) 

 57a (57) (58). Palpi black ; abdomen brownish black with 

 pimpled patches on the fore margin of the segments 

 shewing orange in certain lights. 

 Phora fiapillata, nov. sp. (see E.M.M., 1906). 

 Brancepeth, 1 ?, 15-6-02. 



58 (57) (57a). Palpi and abdomen black. 



59 (60). Two pairs of dorso-central bristles ; third antennal 



joint very large in the male; fore tibiae with one, 

 mid and hind with three bristles, and the hind in 

 the male with a row of 7-8 hind bristles in 

 addition. {strobli, Beck.) 



60 (59). Only one pair of dorso-central bristles. 



61 (62). It is a female, with a small brown third antennal 



joint, and 1-3 bristles on the hinder and outer 

 sides of the hind tibiae. (2848. crassicornts, Mg. ?) 



62 (61). It is a male. 



63 (64). Third antennal joint large and black ; hind tibiae with 



3-4 bristles on the hind and outer sides ; upper 

 frontal bristles lower than the upper fronto-orbital. 



(2848. crassicornis,_ Mg. $) 



64 (63). Third antennal joint short; hind tibias without the 



hind bristle ; upper frontal bristles higher than the 

 upper fronto-orbital. (2849. concinna, Mg. <£) 



65 (2). V.3. not forked. 



66 (70). Vertex with a distinct raised ocellar knob. 



67 (68). Third antennal joint large and orange. 



(bernuthi, Egg.) 



68 (67). Third antennal joint small and black. 



