336 DURHAM DIPTEEA. 



XLII. 563. 



42 (41). Stigma spotted with brown, and always, even when 



unspotted, connected with X.4. by a brown 

 shadow. (2461. U. amcena, Frfld.) 



43 (40). Scutellum with four bristles. 



44 (45). Lattice work black-brown, and long rayed at the 



wing tip. (2459. U. cometa, Lw.) 



45 (44). Lattice work very pale and indistinct, not rayed at 



the wing tip, or imperfectly so. 



(2460. U. eluta, Mg.) 



Family XLIIL— LONCH^ID^E. 



TABLE OP GENERA. 



1 (2). Dark metallic blue or green, plump looking species. 



Lonch^a, Fin. (570) 



2 (1). Yellow, grey, and sometimes shining black, never 



metallic blue or green, of a somewhat slender 

 aspect. Palloptera, Fin. (571) 



TABLES OP SPECIES. 



570. LonchjEa, Fin. 



1 (6). Tarsi entirely black. 



2 (3). Dark green species. (2467. cenea, Mg.) 



3 (2). Dark metallic blue or black species. 



4 (5). Large species, 4-5 mm. Wings somewhat yellowish ; 



X.4. a little beyond the end of V.I .a. 

 2463. Lonchcea vaginalis, Fin. 

 Bishop Auckland, 1 $ and 2 ?, July- August, 1900-01. 



5 (4). Small species, 3 mm. Wings clear; X.4. directly 



below the end of V.I. a. 



2464. Lonchcea chorea, F. 

 Bishop Auckland, 1 $, June, 1897. 



6 (1). Tarsi at least partly yellow. 



7 (10). At least the first three tarsal joints yellow on all legs. 



8 (9). Palpi unusually broad and leaf-like, protruding far 



out of the mouth ; antennae distinctly shorter than 



the face ; third joint broad and round in front. 



(2466. palposa, Ztt.) 



