DURHAM DIPTERA. 229 



XXXI. 379. 



9 (8). Scutellum black. 



10 (11). V.4. with a hang-vein. (1789. appendiculata, Mcq.) 



11 (10). V.4. without a hang-vein. (1784. nemorum, Mg.) 



12 (7). Dorsum with four stripes, or almost unstriped. 



13 (14). Dorsum bluish black ; abdomen black, only slightly- 



shimmering at the sides. (1791- vivida, Ztt.) 



14 (13). Dorsum black, with four almost complete stripes ; 



abdomen with distinct central tesselations. 



15 (16). Wings brown at the base. 



1786. Varichceta rttdis, Fin. 

 Hesleden, 2 $ and 1 ?, June-August, 1 899-1900. 

 It was swarming on fir trees at one spot near 

 Shull in July, 1902, but nearly all males. 



16 (15). Wings not brown at the base. 



1788. Varichceta consobrina, Mg. 

 Hesleden, 2 $, August, 1900. 



380. Echinomyia, Dum. 



1 (8). Abdomen, in addition to the usual bristles, with only 



short close-lying hairs, but not thickly covered 

 with long silky hairs. 



2 (7). Palpi not greatly widened at the end. 



3 (6). Antennae yellow ; third joint dark ; lower cheeks near 



the eye-margin bare. 



4 (5). All black except the palpi and antennas ; abdomen 



sub-globose. ( J 79 2 - grossa, L.) 



5 (4). All orange except the dorsum and a stripe on the 



abdomen. C1793. /era, L.) 



6 (3). Antennae black ; lower cheeks near the eye-margin 



with two or three long bristles. 



382. Peleteria, Dsv. (1795. tesselata, F.) 



7 (2). Palpi claviform, narrow at the base, and suddenly 



much thickened at the ends. 



381. Fabricia, Dsv. (1794. /mw, L.) 



8 (1). Abdomen, in addition to the usual bristles, thickly 



covered with long silky hairs. 



