NOTES ON DIPTERA. 179 



12 a& . conicus, acuminatus : thorax trans caput longe prod ac- 

 tus : pedes crassi ; tarsi incur vi, arliculo basali brevissimo. 

 P. extremus. Fern. Obscure ferrugineus, puree hirtus : 

 thoracis et abdominis later a pallida : antennae fuscce : pedes 

 nigrofusci : alee fuscce, breves, pubescentes. (Corp. long, 

 lin. 1£-; alar. lin. %\.) Found near London. 



Cecidomyia producta, Meigen. Found near London. 



Eriopiera pygmcea, Macquart. Inhabits woods near Lon- 

 don in May. 



Limnophila, Macquart. Separated from Limnobia, Meigen, 

 and comprising L. punctata, Meigen, and other species, that 

 have five posterior cells to each wing. 



Limnobia occulta, Meigen. Frequents the verdant banks 

 of mountain rivulets in North Wales, and the vicinity of the 

 lakes of Westmoreland and Cumberland during the autumn. 

 The species of insects, as well as the soil and climate of the 

 above-mentioned countries, are nearly alike. 



Cylindrotoma, Macquart. Founded upon Limnobia dis- 

 tinctissima, Meigen. Taken at New Lanark, Scotland. 



Tipula dispar, Haliday. Rare near London, but very 

 common in North Wales from September to November. The 

 short wings of the female, like those of many winter moths, 

 are useless for flight, and it crawls over heath and furze 

 bushes. 



Pachyrhina, Macquart. A genus answering to Meigen's 

 second division of Tipula, and comprising T. crocata, pra- 

 tensis, imperialis, &c. 



Ptychoptera lacusiris, Meigen. Found at New Lanark. 

 It has darker and more slender legs than P. contaminata. 



Dictenidia and Xiphura, Brulle. These two genera were 

 separated from Ctenophora, by Brulle. The type of the 

 former is C. bitnaculata ; of the latter, C. atrata ; while 

 C. pectinicornis is left with that genus. Ptychoptera is allied 

 to Dictenidia and Ptych. peclinaia, Macquart connects them. 



Hexatoma nigra, Latreille. Found at New Lanark, 

 Scotland. 



Bolitophila maculipennis. B. fusca major ; alee maculis dua- 

 bus fuscis, una disco, altera ad nervi subcostalis apicem. 

 (Corp. long, lin 3| ; alar. lin. 6.) Found but very rarely 

 near London in the spring; and in the autumn, near Amble- 

 side, in Westmoreland. 



