127 
J. C. H. de Meijere, 1916: Beitråge zur Kenntnis der Dipteren-Larven 
und -Puppen. Zoolog. jahrbücher. Abt. f. System. Bd. XL. 
Fr. Meinert, 1886: De eucephale Myggelarver. Dansk Vidensk. Selsk. 
Skr. 6 R. nat-math. Afd. III. 
L. C. Miall and N. Walker, 1895: The life history of Pericoma canes- 
cens. Trans. Entom. Soc. Lendon 1895. 
Fr. Miiller: Contribution towards the history of a new form of larvæ 
of Psychodide from Brasil. Trans. Entom. Soc. London 1895. 
C. R. Osten-Sacken, 1895: Appendix to the paper of prof. Miall and Nor- 
man Walker. Trans. Entom. Soc. London 1895. 
H. Schmitz, 1917: Biologische Beziehungen zwischen Dipteren und 
Schnecken. Biol. Zentralbl. Bd. 37. 
G. H. Verrall, 1886: A hundred neu British species of Diptera. Entom. 
Monthly Mag. Vol. XXIII. 
M. Zuelzer, 1909: Beitrag zur Kenntnis der Entwicklung von Psychoda 
sexpunctata Curtis, der Schmetterlingsmücke, Mitteil. aus d. 
kgl. Prüfungsanstalt f. Wasserversorgung u. Abwässerbe- 
seitigung. Hft. 12. 
Summary. 
The larva of Philosepedon humeralis Meig. is not previously de- 
scribed; only in papers of Gimmerthal, Verrall and Schmitz I have found 
a little note, that it has been found among rotten potatoes and in the 
houses of dead snails. The material in question was found in the 
houses of dead snails in the neighbourhood of Copenhagen in March; 
in the same month the imagines emerged. The larva of this species 
differs from the larve of allied species by the absence of spiracles 
on the prothoracal segment. The mouthparts are well-developed and 
resemble in several respects the mouth-parts of the primitive Tipulide 
especially Trichocera. From the posterior edge of the mouth (the 
mandibular segment) a process protrudes; in front of this there is the 
mentum (m), the præmentum (pm) and the hypopharynx (h). The 
maxilla as well as the mandibles are large; on the mandibel (fig. 6) 
there is tree plumose sete; at Psych. alternata has Zuelzer errone- 
ously described this seta as antenna. The antenne (fig. 4) are only 
little knobs as in the other Psychodian larve. As in the Chirono- 
midian larvae there are distinct pramandibles. On the ventral side 
of the prothoracal segment is a button with chitinous spines (fig. 3) 
very like the prothoracic appendages in the Chironomidian larve but 
smaller. On account of the larval structure I suppose it correct to 
consider the Psychodide not as usual as specialized Culicide, but as 
a separately developed group as the Pfychopteridw. 
Zool. Museum, Copenhagen 22.— 10.— 19, 
