142 

 XX 

 105 

 106 

 107 



108 



109 

 110 



111 

 112 



113 



114 

 115 



116 

 117 

 118 

 119 



120 

 121 



122 



123 



124 



125 

 126 

 127 



128 

 129 

 130 



DURHAM DIPTERA. 



V. 223. 



104). Hind femora with only one praeapical bristle. 



109). Antennae nearly all black. 



108). Fore tarsi pale, with only the last joint black. 



(1206. confusus, Ztt.) 



107). Fore tarsi black, with only the metatarsus pale. 



trivialis, Hal. (1229) 

 106). Antennas mostly orange. 



111). Hind tarsi pale at the base. 



(1226. virgultorum, Wlk.) 



110). Hind tarsi entirely black. 



113). Hind tibiae entirely yellow. 



(1227. arbustorum, Stan.) 



112). Hind tibiae darkened at the tip. 



(1228. festtvuSf Hal.) 



103). Mid metatarsi without any bristle above. 



116). Mid tibiae with two bristles beneath. 



(1207. discifer, Stan.) 



115). Mid tibiae with only one bristle beneath. 



120). Hind femora with more than one praeapical bristle. 



119). Hind tibiae all yellow. popularis, W. (1211) 



118). Hind tibiae black, at least on the apical half. 



urbanus, Mg. (12 13) 



117). Hind femora with only one praeapical bristle. 



124). V.4, distinctly bayonet-shaped, twice bent at right 



angles, and then running parallel with V.3. 

 123). Hind metatarsi nearly all black, with only one 



bristle above. griseifiennis, Stan. (1221) 



122). Hind metatarsi black only at the tip, and with two 



bristles above. (1220. nittdus, Fin.) 



121). V.4, only indistinctly bayonet-shaped, obtusely 



bent, and then gradually nearing V.3. 

 128). Hind metatarsi with only one bristle above. 

 127). Femora mostly blackish. (1201. clavifies, Hal.) 

 126). Femora yellow. (1222. signifer, Hal.) 



125). Hind metatarsi with at least two bristles above. 

 130). Hind tibiae nearly all black, urbamts, Mg. (1213) 

 129). Hind tibiae yellow, unless at the tip. 



