330 DURHAM DIPTERA. 



XLII. 554. 



tables op species. 



554. Acedia, Dsv. 



1 (4). V.4 3 about half as long as V.4 4 ; X.4. about the 



middle of 0.5 2 . 



2 (3). 0.6 1 and 0.5 1 , or at least the latter, wholly or mostly 



clear. 



2403. Acidia cognata, W. 

 Bishop Auckland, 1 ?, July, 1901. 



3 (2). O.6 1 and 0.5 1 wholly darkened, or at least the latter, 



except a small spot. ( 2 4°5- lychnidis, F.) 



4 (1). V.4 3 scarcely one-third of the length of V.4 4 ; X.4. 



far beyond the middle of 0.5 2 . 



2404. Acidia heraclei, L. 



Bishop Auckland, 1 $, April, 1902 ; Bedburn, 1 $, 

 June 12, 1905. 



557. Spilographa, Lw. 



1 (8). Third antennal joint rounded in front; V.3. distinctly 



bristly ; hind femora without bristles on the under 

 side. 



2 (3). X.4. distinctly before the middle of 0.5 2 . 



2409. Spilographa zoe, Mg. 

 Bishop Auckland, 3 $ and 2 ?, April-June, 1902. 



3 (2). X.4. on the middle of 0.5 2 . 



4 (5). Third antennal joint somewhat concave above ; male 



frons with an antler-like protuberance bearing 

 strong bristles. (2408. abrotani, Mg.) 



5 (4). Third antennal joint not concave ; male frons without 



protuberance. 



6 (7). Tip of the wing broadly dark ; the bands on X.4. and 



X.5 2 united at the hind margin; the X.5 2 band 

 only reaching up to V.4. (2410. hamifera, Lw.) 



7 (6). Tip of the wing narrowly dark ; band on X.4. not 



reaching the hind margin, and not united to the 

 X.5 2 band, the latter long and reaching the fore 

 margin. (241 1. artemisice, F.) 



