DURHAM DIPTEEA. I27 



XXIII. 218 



47 (46). Palpi white ; tip of the antennae black ; abdomen all 



shining black. ( JI 75- articulata, Mcq.) 



48 (39). Tarsi all yellow, or only the last joints dark. 



49 (50). V.3. and V,4. parallel ; palpi white. 



(n 74. calceatayMg.) 



50 (49). V.3. and V.4, converging, not quite parallel. 



51 (52). Abdomen black with grey marks. 



(1166. fasciata, Mg.) 



52 (51). . Abdomen all black. 



53 (54). Base of antennae and legs pale yellow ; palpi white ; 



tarsi with brown ends ; 2^-3 mm. 



(n 73. candicans, Fin.) 



54 (53). Base of antennae and legs tawny. 



55 (56). Size 3^ mm. Palpi yellow; head shining white in 



front; tarsi with brown ends; femora brown, 



tawny at the base and tip. 



(11 72. laticincta, Wlk.) 



56 (55). Size 2 mm. Palpi whitish ; head hoary ; legs stout ; 



ends of the tarsi not dark. (1164. robusta, Wlk.) 



57 (11). Legs yellow or orange with sharply bounded black 



parts on the femora and tibiae, or mostly black. 



58 (65). All the femora broadly black, only the extreme base 



or tip yellow. - . 



59 (64). Tibiae mostly pale. 



60 (63). All the tibiae entirely pale except the tip of the hind 



tibiae. 



61 (62). Large species, 2^-3 mm. ; tarsi ringed. 



(1165. annulata, Fin.) 



62 (61). Small species, 1^ mm. Tarsi orange with only the 



last joint black. ( II 5^>- exigua, Mg.) 



63 (60). Mid and hind tibiae black at the base and tip. 



(115 1. minuta, Mg.) 



64 (59). Legs all black except the fore and mid knees and the 



bases of the fore tibiae and joints of fore tarsi. 



(1154. dubia, Mg.) 



65 (58). Fore and hind femora yellow. 



