40 DIPTERA OF NORTH AMERICA. [PART IV. 



before, and five species from the West Indies and Mexico, thirty- 

 seven species remain. These are : — 



1. Erioptera caliptera Say, described below under the same 

 name. 



2. Erioptera fascipennis Zett. ; a Bhypholophus, closely allied 

 to R. nubilus, but' apparently distinct; unknown to me; its de- 

 scription is reproduced in the Appendix I. 



3. Pedicia albivitta Walk, is described below under the same 

 name. 



4. Limnobia argus Say = Trochobola argus (comp. below). 



5. Limnobia badia Walk. =Dicranomyia badia (comp. below). 



6. Limnobia biterminata Walker (Dipt. Saund. Y, p. 43T), 

 according to the author's description, has two submarginal and 

 five posterior cells ; the first submarginal with a very short 

 petiole ; the prsefurca rectangular near its origin, etc. I know 

 of no species to which this description can be applied ; it suggests 

 L. luteipennis, but this species is three lines long, and not six, 

 the antenme are not tawny at the basis, the wings are not 

 " grayish," but brownish ; the second marginal cell has not a 

 short, but a long petiole ; the third vein does not form a very 

 obtuse angle near its basis. Moreover there is a contradiction 

 in Mr. Walker's description ; the diagnosis says " abdomen basi 

 fulvum ;" the description on the contrary has : " abdomen taw r ny 

 at the tip." This description is reproduced at the end of this 

 volume. 



7. Limnobia cana Walk. I have seen the original of this 

 species at the British Museum and took it for Symplecta puncti- 

 pennis. I overlooked at that time Mr. Walker's statements 

 about the differences between these two species (List, etc. I, p. 

 49). Nevertheless these statements are not quite clear, and 

 would not influence my opinion in the absence of the original 

 specimen. 



8. Limnophila carbonaria Macq. is a species unknown to me, 

 the description of which is reproduced at the end of this volume. 



9. Limnobia cinctipes Say is described below under the same 

 name. 



10. Limnobia contermina Walk, is probably a variety of 

 Pedicia albivitta (compare this species). 



11. Limnobia fascipennis Say = Epiphragma fascipennis. 



