452 
Melinda cognata Meigen 
Living snails, closed with epiphragms, were put in a jar containing the 
larvae of M. domestica. In eight days the snails were completely eaten up by 
the larvae. The latter burrowed their way through the epiphragm and com¬ 
pletely penetrated into the foot of the Mollusc. The penetration occupied 
about eight hours, and the abundant secretion of mucus by the snail did not 
seem to disturb the larva. The attacked snails are very often covered with a 
mite: Eyrenetes limaceum Schrank. The larvae, after they have destroyed one 
snail, pass easily into another living or dead specimen. 
Living snails were placed under a bell-jar containing several pairs of M. 
domestica and 12 days later they were all devoured by the maggots. In the 
middle of January, 50 snails were collected from the wall close to the military 
hospital, they were separated in tightly closed jars which were placed at 25° C., 
9 of the 50 Molluscs yielded M. domestica larvae. 
The larvae, pupae and adults of this fly, bred from the snail, seem to be 
smaller than those which live, or are bred from decomposed organic sub¬ 
stances. 
Seguy also recorded the presence in the snails of the larvae of Calliphora 
erythrocephala and Phora giraudii Egg. 
REFERENCES. 
Aldrich, J. M. (1915). The economic relations of the Sarcophagidae. Journ. of Economic 
Entom. viii. 242-246. 
- (1916). Sarcophaga and Allies in North America. La Fayette, Indiana. Edited by 
The Thomas Say Foundation of the Entomological Society of America (see pp. 158-161). 
Barnard, K. H. (1911). Chironomid larvae and Watersnails. Entom. Monthl. Mag. XLvn. 
76-78. 
Bergenstamm, J. von (1864). Ueber die Metamorphose von Discomyza incurva Fall. 
Verh. d. zool.-bot. Gesel. Wien, xiv. 713-716. 
Bottcher, G. (1913). Die mannlichen Begattungswerkzeuge bei dem Genus Sarcophaga 
Meig. und ihre Bedeutung fur die. Abgrenzung der Arten (Dipt.), Schluss. Deutsche 
Entom. Zeitschr. pp. 351-377 (see p. 367). 
Bowell, E. W. (1917). Larva of a Dipterous Fly feeding on Helicella itala. Proceed, of the 
Malacol. Soc. of London, xii. 308. 
Brues, Ch. T. (1903). Melanophora roralis, parasitic on an Isopod. Entom. News, xiv. 291. 
Cholodkovsky, N. (1908). Ueber den weiblichen Geschlechtsapparat einiger viviparen 
Fliegen. Zool. Anzeig. xxxm. 367-376. 
Dufour, L. (1840). Recherches sur les metamorphoses du genre Phora, et description de 
deux especes nouvelles de ces Dipteres, avec figures. Mem. de la Soc. R. des Sc. de VAgric. 
et des Arts de Lille , pp. 414-424, 21 fig. 
Goureau (1843). Note sur un Diptere dont la larve vit dans VHelix conspurcata ( Melano¬ 
phora helicivora Goureau). Ann. Soc. Ent. Fr. 2 me Serie, i. 77-80. 
Hendel, F. (1901). Beitrag zur Kenntniss der Calliphorinen (Dipt.). Wien. Ent. Zeitung, 
xx. 28-33. 
Keilin, D. (1911). Recherches sur la morphologie larvaire des Dipteres du genre Phora. 
Bull. Scient. de la France et Belgique, xliv. 27-78, Pis. I-IV. 
- (1912). Phora maculata Mg. est-il parasite de Gelechia maculatella Hb. ? Feuilles de 
Jeunes Naturalistes, pp. 150-151. 
