262 DURHAM DIPTERA. 



XXXIII. 455. 



455. Limnophora, Dsv. 



1 (4). Wings blackish. 



2 (3). Dorsum with four stripes. 



2008. Limnophora compuncta, W. 

 Wearhead, 2 $, June, 1901. 



3 (2). Dorsum with three stripes. (2009. sororcula, Ztt.) 



4 (1). Wings clear. 



5 (8) (9). Dorsum with three stripes. 



6 (7). Eyes widely separated in both sexes. 



(2015. triangula, Fin.) 



7 (6). Eyes nearly touching in the male. 



(2014. litorea, Fin.) 



8 (5) (9). Dorsum hoary, almost unmarked. 



2013. Limnophora solitaria, Ztt. 

 Bollihope, 1 $, June; Wearhead, 1 $, August, 1901. 



9 (5) (8). Dorsum black, unstriped or obscurely striped. 



10 (11) (12). Eyes of the male moderately widely separated; 



three post-sutural bristles. 



(2010. triangnligera, Ztt.) 



11 (10) (12). Eyes of the male quite touching ; abdomen 



ovate, with three pairs of spots, and also a single 

 spot on the fourth segment ; four post-sutural 

 bristles. (2012. septemnotata, Ztt.) 



12 (10) (11). Eyes of the male nearly touching; abdomen 



somewhat cylindrical. (201 1. contractifrons, Ztt.) 



456. Melanochila, Rnd. 



2016. Melanochila riparia, Fin. 

 Wearhead, 1 $, August, 1901. 



457. Macrorchis, Rnd. 



2017. Macrorchis meditata, Fin. 



Wearhead, 1 $, August, 1901 ; Bishop Auckland, 1 $ 

 and 2 $, June, 1901. 



