On the Anatomy and Physiology of the Air-Sacs 
of the Larva of Corethra plumicornis. 
By 
K. S. Bardenfleth and R. Ege. 
ik the Laboratories of Biological fresh water research at Hilleråd 
of Zoophysiology at the earn of Copenhagen.) 
L 
Form and Structure.” 
By mag. sc. K. S. Bardenfleth. 
Since the first descriptions of the larva of Corethra") by Réau- 
mur and Lyonet the attention of the naturalists has been attrac- 
ted by the peculiar "phantom-like" appearence (Miall) of the totally 
transparent animal — so unlike the larvæ of the other Culicidæ —-, 
by its life-habits and no less by the curious air-sacs in its body. And 
") The name Corethra Meigen is in more recent works frequently substi- 
tuted by Sayomyia Coq., Corethra Meigen in its turn becoming a substi- 
tute for Mochlonyx Loew. The type species of Corethra Meigen is 
Tipula culiciformis of de Geer; but this species' being later on referred 
to the genus Mochlonyx of Loew, the genus-name Corethra Meigen 
international rules of nomenclature, to follow its type species, and a new 
or a still earlier name ought to be given to the remaining ci-devant 
Corethra-species; and consequently Coquillet has formed the new name 
Sayomyia. But setting aside that those names of hybrid nature (in a phi'o- 
logical respect) rather were to be avoided, and in this case easily can 
venient to exchange one well known name (in this case Mochlonyx) for 
another name formerly used in a differént sense. (Cfr. A. Handlirsch in 
Chr. Schråder: Handb. d. Entomologie, Bd. II, 1914.) In this paper, there- 
fore, Corethra will be used -in its old signification, including the species 
plumicornis and its allies. 
