38 
Parasitic Diptera 
Philornis. 
Meinert, 1889, p. 315. 
1. Philornis pici (Macquart). 
Aricia pici, Macquart, 1853, p. 657, pi. xx, 2. 
Hylemyia pici, Osten Sacken, 1878, p. 167; Aldrich, 1905, p. 553. 
Mydaea pici, Miranda Ribeiro, 1901, p. 156, pi. i; Busck, 1906, p. 2; 
Lutz and Neiva, 1912, p. 133; Aiken, 1913, p. 3 (sep.), figs. 1-11; Rodham 
and Bequaert, 1916, p. 247; Neiva and Penna, 1916, p. Ill; Keilin, 1917, 
pp. 399 and 436; Stein, 1919, p. 123; Engel, 1920, p. 250. 
? Hylemyia angustifrons, Loew, 1861, p. 41. 
Mesembrina anomala, Jaennicke, 1867, p. 377, pi. ii, fig. 4. 
Spilogaster anomala, Brauer and Bergenstamm, 1893, p. 209, note 114, 1; 
Blanchard, 1895, p. 118 and 1895, p. 652, pi. 17, figs. 5-9. 
Mydaea anomala, Nielsen, 1913, p. 252, figs. 1-4; Aiken, 1913, p. 3 (sep.); 
Keilin, 1914, p. 114 and 1917, p. 399; Stein, 1918, p. 212. 
Philornis molesta, Meinert, 1889, p. 315, pi. vi. 
Geographical distribution. If all the above records belong really to one 
species, it must have a wide range of distribution over Neotropical Region, 
from Cuba, San Domingo and Central America to Argentina. 
Ethology. Well illustrated by Meinert and others. The larva pupates in a 
cocoon of earth cemented by a white substance. This fact seems to be un¬ 
common in Anthomyidae, but is observed also in the tropical Synthesiomyia 
nudiseta, v. d. Wulp, besides the cases recorded by Dr Keilin, 1917, p. 437. 
2. Philornis torquans (Nielsen). 
Mydaea torquans, Nielsen, 1913, p. 252, fig. 3; Aiken, 1913, p. 3 (sep.); 
Keilin, 1914, p. 114 and 1917, p. 399. 
Mydaea anomala, Nielsen, 1911, p. 195, figs. 1-14. 
Geographical distribution. At present only known from Argentina. 
Ethology. The larva pupates freely, without producing a cocoon. 
3. Philornis spermophilae (Tyler Townsend). 
Mydaea spermophilae, Tyler Townsend, 1893, p. 381; 1894, p. 173 and 
1895, p. 79; Aldrich, 1905, p. 543; Aiken, 1913, p. 3 (sep.). 
Mydaea spermophila, Keilin, 1917, p. 399. 
Geographical distribution. Only known from Jamaica; but Townsend, l.c., 
records a different species, which infests birds in Trinidad. 
Ethology. The larva does not make a cocoon for pupation. 
These three flies can be distinguished as follows: 
1 (4). Third antennal joint about twice as long as the second 1 ; abdomen 
1 The figure given by Blanchard, 1896, pi. 17, figs. 5—8, if really belonging to pici {anomala), 
must be somewhat inaccurate, showing, in opposition with the figures of Macquart, Jaennicke, 
Miranda Ribeiro and Aiken, a much longer third antennal joint and a bare arista. 
