18S.S.] 105 



■which he foiTned for its reception ; but in his last volume* he removed it into the 

 genus Limiiophora along with d. litorea. Haliday saysf " This fly will form the 

 type of a genus allied to TAmnophora and Lispa," but he did not make one. 

 Schiner includes it in the genus Myopina, Desv., along with M. reflexa {3Iusca 

 myopina, Fall.), but the latter species has very minute alulets, and properly belongs 

 to the acalypterate division of the Muscidce, in which it was placed by Meigen. This 

 fly is not uncommon, and may often be found seated on stones in brooks and rivers. 

 Haliday described and figured the larvse and pupse, which are aquatic and live 

 among ConfervcB, to which they adhere by means of hooks with which they are 

 furnished. 



27. C^NOSIA, Meig. 

 Gen. cli. — Eyes bare, widely separated in both sexes ; arista pu- 

 bescent or bare ; forehead unprojecting ; alulets with scales o£ 

 unequal sizes ; abdomen of male mostly sub-cylindrical, and thickened 

 or clubbed at the end ; anal vein of wings more or less abbreviated. 



Sect. 1 — Legs hlack. 



1. TRIANGULA, Fall. 



nigripes ?, Macq. 



2. SOLITAEIA, Zett. 



octosignata ?, Eond. 



3. AGEOMTZELLA, Eoud. 



Sect. 2 — Legs wlioVy or partly yellow. 



4. INFANTULA, Eoud. 



5. ELEGAJfTULA, Eoud. 



6. PALLICOENIS, Zett. 



7. ANGULATA, Eoud. 



8. SEX-NOTATA, Meig. 



9. GENUALis, iJond. 



10. GENICULATA, Fall. 



11. VEENA, Fab. 



12. PEDELLA, Fall. 



C. TEIANGULA, Fall. 



This little species has been placed by Macquart in the genus LimnopTiora, and 

 it possesses more of the characters of that genus than of those of CcBnosia, with the 

 exception of having the eyes widely separated in both sexes, for the abdomen is 

 marked with a double row of large, triangular, or quadrate spots, whereas, in the 

 spotted species of Cisnosia, the spots are usually small and round or oblong. Not 

 uncommon. 



C. SOLITAEIA, Zett. 



This possesses very similar characters to those of C. triangula, the abdomen 

 being marked in a similar manner ; it differs from it, however, in being rather 

 larger, and in having the thorax entirely of a light ash-grey colour marked with 

 three narrow indistinct brown stripes ; while, in C. triangula^ the thorax is dark 

 brown or black with grey shoulders, and unstriped. Rare. 



C. AGEOMTZELLA, Eond. 

 I have only seen one specimen of this species, which was in the collection of 

 * Dipt. Italise prodromus, vol. vi. + Nat. Hist. Review, July, 185/", p. 195. 



