BiBlO may be distinguished from Dilophus Meig., which it 

 most resembles, by the mucronated anterior tibiae and by its 

 9-jointed antennae, the nervures of the wings are also different. 



The large heads and transparent wings of the males give 

 them an appearance so dissimilar to the females, which are in 

 one instance of a totally different colour, that no one would at 

 first believe them to belong to the same genus. During May 

 the flowers in the fields and meadows round London swarm 

 with the B. hoi'tulanus, and about the same period our streets 

 are frequently visited by the large, heavy and sombre-coloured 

 Bibio Marci, figures of which with its larva and pupa are 

 given by Reaumur, tom. 5. pi. 7. 



We find in our cabinets the following species ; and there 

 may be 2 or 3 more unnamed. 



1 B. Pomonae R, Don. Br. Ins. 9. 300. 



2 Marci L., Reaum., Panz. 95. 20. — brevicornis Linn., 



Fab., mas. 



3 hortulanus L., Schceff.pl. 104./ 8 — 11. 



4 Johannis i., De G. 6. tab. 27./ 1 2-20.— Pyri Fab. Ent. 



Syst. — praecox Fab. Syst. Ant. 



5 vernalis Meig. 



6 nigripes Meig. 



7 venosus Meig. 



8 ferruginatus L., DeG. 6. 160. 35. 



9 lanigerus? Hgg., Meig. 



10 clavipes Meig. — Johannis Fab. 



11 dorsalis? Meg., Meig. 



The beautiful female figured I took at Birch Wood, Kent, 

 in the early part of May a few years since, and Mr. Stephens 

 has 2 males in his cabinet. 



For specimens of the plant Paris quadrifolia (Herb Paris) 

 I am indebted to Professor Henslow and Mr. George Charl- 

 wood, who found it at Harefield, Middlesex. 



