90 ANNALS OF SCOTTISH NATURAL HISTORY 



2. (i.) Mediastinal vein complete. 



3. (4.) Halteres black or blackish ; third joint of antennae and 



palpi reddish or yellow. unispinosa, Ztt. 



4. (3.) Halteres whitish or yellow. 



5. (6.) Small species (1-2 mm.) $ palpi very large and with a 



single long terminal bristle, ? smaller and with several 

 terminal bristles; legs moderately stout; halteres whitish; 

 costa not thickened on outer third. nudipalpis, Beck. 



6. (5.) Large species (3 mm. or more) palpi normal, pointed, and 



with a few short marginal bristles ; legs long and slender ; 

 halteres yellow ; costa thickened on its outer third. 



autumnalis, Beck. 



pubericornis. Mall. I took a large number of this species 

 in the autumn of 1907 at Bonhill. They were taken 

 on the undersides of a species of Agaricus on fallen 

 timber. Mr. J. E. Collin informed me that he has it 

 from New Forest. 



unispinosa, Ztt., a very common species everywhere. 



nudipalpis^ Beck, as common as the foregoing. 



autumnahs, Beck, so far only recorded from England. I 

 have seen it from Cambridge. 



PARASTENOPHORA, nov. nom. 



I placed the single species of this genus in a genus I named 

 Woodia in a previous paper, but since writing this I have been 

 informed by Mr. Grimshaw that the name is preoccupied in Mol- 

 lusca (Deshayes, 1860). I have thus had to alter the name to one 

 which I have less liking for. 



Generic description : Antennae normal, arista dorsal ; frontal 

 bristles unusually weak and situated as in Stenophora ; costa to about 

 middle of wing ; second vein present, first thin vein bent at base, 

 four thin veins present ; mid tibiae with one bristle at base, hind 

 tibiae with no bristle on middle. 



gracilis, Wood, is the only species of the genus. It is a peculiar- 

 looking insect, and shows an approach to the next genus in that 

 sometimes the legs are entirely devoid of bristles. The third thick 

 vein is incrassated in both sexes. I have met with it at Bonhill, 

 and Dr. Wood has taken it at Hereford, from which place the 

 specimens came that the original description was drawn from. 



BECKERINA, nov. gen. 



Generic description : Antennae moderately large, arista dorsal ; 

 frontal bristles as in Phora, Latr. ; post-antennal bristles erect ; costa 



