380 M. F. Meinert on Mochlonyx (‘Tipula) 
Schiner, in his ‘Fauna Austriaca’ (p. 622), adopts the 
genus Mochlonyx, and gives, from individuals which he ob- 
tained from Loew, a description of it, drawn up with constant 
references to Corethra and in his usual pattern of generic 
descriptions; but we learn nothing new from it. 
From all this I think that a complete description both of 
the genus in its two sexes and of De Geer’s so long misunder- 
stood species, Tipula culiciformis, will not be out of place. 
.... From this it will appear that, although the two genera 
[ Mochlonyx and Corethra| come very near together, espe- 
cially in the female sex, there are nevertheless besides those 
differences between the sexes which are so characteristic of the 
new genus sufficient characters for the establishment of the 
two genera. ‘The likeness between the imagines of the genera 
is the more remarkable as the difference between the larvee 
and pupx, and especially between the larve, is so great; 
but, on the other hand, there are other genera among the true 
Culicids, such as Culex and Anopheles, of which the ima- 
gines, at any rate in one sex *, are so like as to lead to con- 
fusion, while the larve are exceedingly different, inasmuch as 
some of them have and others are destitute of external 
breathing-tubes, therefore a difference similar to that between 
the larvee of Corethra plumicornis and Mochlonyx culictformis. 
Here, both with regard to the-undescribed larva of Anopheles 
and the other more or less known midge-larve, I may 
refer to the great memoir upon these larve, which, as already 
stated, I shall soon be able to complete; and in the mean- 
while the reader must content himself, as regards the larve 
of Mochlonyx, with De Geer’s rather rough representation 
(cempl. xxi. i198, 3—9),\ 9 
As it would occupy too much time and lead me too far 
should I establish an independent scheme of the genera of 
Culicids, and I should, moreover, run the risk of producing 
nothing better than we already possess, I shall here avail 
myself of Schiner’s, as elaborated by him in his ‘ Fauna 
Austriaca,’ and introduce into it various new characters. 
Familia Culicide. 
Genus Mocutonyx. 
Mochlonyx, Loew, Ent. Zeit. Stettin, Jahrg. vy. p. 121, note. 
Corethra, Ruthe, Zetterstedt. 
Magnitudinis mediocris species figuram Culicés sensu 
strictissumo quodammodo referunt. 
* Thus with regard to Culex nemorosus see Zetterstedt (J. c. p. 3458 
. . 8 ? 
note) :—“ Caveas ne hune cum Anophele bifusciato confundas. 
