234 ©. R. Osten Sacken: 
Note on Mr. Bigot’s elassifieation of the Tipulidae. 
In order to complete the survey of all the genera of the Tipu- 
lidae, it remains for me to give in account of Mr. Bigot’s „Synoptie 
table” of these genera published in the Annales de la Soc. Entom. 
de France 1854, p. 447—482. Such an account is the more neces- 
sary, as these tables contain several new generic names, which have 
not been mentioned anywhere since their pnblication. As I am well 
aware that Mr. Bigot himself does not hold now the opinions he 
expressed in that paper, my remarks will have no other than an 
historical interest. 
Mr. Bigot selects the presence or absence of the discal cell as 
the basis of his first subdivision of the Nemocera; the result is as 
follows (l. e. p. 465): 
Wings with a discal cell. 
Head of an ordinary structure; no rostrum; proboscis more 
or less prominent . . . . . - . . Bhyphidae. 
Head prolonged in a more or less prominent rostrum 
Tipulidae. 
Wings without discal cell ete.e Limnophilidae, Psycho- 
didae, Mycetophilidae, Bibionidae. 
The reader who knows that the genus Limnophila Macq. with 
its numerous species has a discal cell, will naturally ask himself how 
it comes to be placed in a „Curia” without that cell? We find the 
answer on p. 456: „the species of Limnophila Macq. provided with 
a discal cell are my true Tipulidae (mes vraies Tipulides) and re- 
ceive the new generic name Phylidorea Bigot.“ Now what are the 
Limnophilidae Bigot (without discal cell)? 
The answer is found on p. 473, in the analytical table of the 
genera of Limnophilidae, as follows: 
A. Head prolonged in a rostrum: 
Macrochile Loew, Polymera, Ula, Ptychoptera, Apei- 
lesis, Trentepohlia n. gen., Limnophila, Dolichopeza, 
Octavia n. gen., Anisomera. 
AA. Head without rostrum: 
Dixa, Zygoneura (}!). 
Among this heterogeneous group, two genera do not belong here 
at all, even according to Mr. Bigot’s own system: Macrochile and 
Ula have a discal cell. 
The new genus Octavia is intended to receive all the Zrio- 
pterae without a discal cell (l. c. p. 456). Zrentepohlia nov. gen. 
