176 DURHAM DIPTERA. 



XXVIII. 278. 



16 (23). Edge of scutellum with black bristly hairs. 



17 (18). Legs entirely black. 



1460. Chilosia variabilis, Pz. 

 Harperley, 1 $, 24-4-00 ; Hesleden, 1 $, 20-8-02. 



18 (17). Legs partly orange. 



19 (20) Scutellar bristles short ; tibiae pale at the base only. 



(1461. honesta, Rnd.) 



20 (19). Scutellar bristles long; tibiae pale at both ends. 



21 (22). Antennae blackish ; legs considerably orange. 



(1462. vulfiina, Mg.) 



22 (21). Antennae reddish ; legs but little orange. 



(1463. barbata, Lw.) 

 28 (16). Edge of scutellum without any black bristles ; legs 

 partly orange. 



24 (25). Wings without conspicuous markings ; hairs all pale 



brown. 



1464. Chilosia intonsa, Lw. 



Hesleden, 1 ?, 18-8-99. 



25 (24). Wings darkened across the middle. Hairs of three 



colours ; very hairy, bee-like species. 

 1465. Chilosia ilhtstrata, Harr. 

 Hesleden, 3 $, 1 ?, August, 1899, 7 $, 4 $, August, 

 j 902 ; " Killingworth," C. Robson. 



26 (15). Face, apart from woolly tomentum, with no trace of 



hairs, except on the eye margins. 



27 (36). Edge of the scutellum without black bristles. 



28 (29). Third antennal joint brownish black. 



(1466. grossa, Fin.) 



29 (28). Third antennal joint orange. 



30 (31). Pubescence bright foxy ; third antennal joint rather 



angular at its upper tip. (1467. chrysocoma, Mg.) 



31 (30). Pubescence orange or greyish yellow ; third antennal 



joint rounded above at the tip. 



32 (35). Wings not at all clouded. 



33 (34). Pubescence on the thorax very long, and all greyish 



yellow. (1468. albipila, Mg.) 



