D. Keilin 
183 
As to the puparia of these two species they also differ: "By examination 
of the puparia of domestica sent me from Dr Schmitz it was proved, that these 
puparia are identical with the puparium described by Keilin (Bull. Sci. France 
et Belgique (7), 45, 1911, 47) as bergenstammi, so that the species treated by 
Keilin under that name is in reality domestica. An easily observable difference 
between the two puparia is, that while that of domestica has at the lateral 
margin of each segment two papillae, a small and a larger, with bristles on the 
apex, there are in bergenstammi on each segment three such papillae, a small, 
a medium sized and a large (Fig. 2)."” 
REFERENCES. 
Annandale, N. (1919). Mortality among snails and the appearance of Blue-bottle Flies. 
Nature, civ. 412—413. 
Keilin, D. (1911). Recherches sur la morphologic larvaire des Dipteres du genre Phora. 
Bull. Sci. France et Belgique, xliv. 27-78, Pis. I-IV. 
__ (1919). On the life-history and larval anatomy of Melinda cognata Meigen (Diptera, 
Calliphorinae) parasitic in the snail Helicella ( Heliomanes) virgata Da Costa, with 
an account of the other Diptera living upon Molluscs. Parasitology, xi. 430-455, 
Pis. XXII-XXV. 
Lundbeck, W. (1919). Remarks on Paraspiniphora maculata Meig., notata Zett., bergen¬ 
stammi Mik. and domestica Wood, together with change of names of three newly 
described species of Aphiochaeta. Vidensk. Medd. fra Dansk. naturh. Foren, lxxi. 
125-132. 
Oldham, Ch. (1912). Report on land and fresh-water Mollusca observed in Hertfordshire 
in 1910. Trans, of the Hertfordshire Natur. Hist. Soc. xiv. See p. 288. 
Rostand, J. (1920). Sur la biologie de Sarcophaga filia Pandelle [Dipt.]. Bullet. Soc. Ent. 
France, 215-216. 
Seguy, E. (1920). On Sarcophaga melanura. MS. note, see p. 181 of this paper. 
Shipley, A. E. (1920). The fly and the snail. Country Life, xlvii. 14-15. 
Thompson, W. R. (1921). Contributions a la connaissance des formes larvaires des Sarco- 
phagides [Dipt.]. 1. Engyzops pecchiolii Rond. Bull. Soc. Ent. France, 27-31. 
Woodruffe-Peacock, E. A. (1920). MS. note on Helicella virgata and Melinda cognata. 
See p. 180 of this paper. 
Note: Professor A. E. Boycott, F.R.S., has kindly called my attention to the following 
few misprints which he found in my previous paper (1919): 
pp. 433 and 435, instead of Hygromyia read Hygromia. 
p. 434, para. 2, and in References, instead of Steep read Step. 
p. 435, para. 1, instead of rufiscence read rufescens. 
p. 442, para. 5, and p. 448, para. 2, instead of cantioniformis read cantianiformis. 
He informs me also that “//. virgata is hardly ‘very common’ in England and Wales. In 
many parts of the west and north it is quite a rare species, especially inland.” 
