ORNITHOMYIA. 431 
ORNITHOMYIA. 
Ornithomyia, Latreille, Hist. Nat. Crust. et Ins. xiv. p. 402 (1804). 
Of this genus also I have seen three Mexican species, one of them being identical 
with the common European 0. avicularia, L. The principal characters distinguishing 
them are :— 
1. First vein ending in the costa distinctly before the small cross-vein . . avicularia, L. 
First vein ending in the costa just above the small cross-vein . . . 2. 
2. Fourth portion of the costa (between the first and second veins) much 
longer than the fifth portion (between the second and third veins) . . robusta, v. d. Wulp 
Fourth portion of the costa as long as the fifth. . . . . . . . . pilosula, v.d. Wulp. 
1. Ornithomyia avicularia, (Tab. XIII. fig. 4, wing.) 
Hippobosca avicularia, Linn. Faun. Suec. no. 1922+; Fabr. Ent. Syst. iv. p. 415°; Syst. Antl. 
p- 3388 °. 
Ornithomyia avicularia, Meig. Syst. Beschr. vi. p. 232°; Schiner, Faun. Austr., Dipt. ii. p. 647° 
Ornithomyia viridis, Meig. loc. cit. p. 233°. 
Ornithomyia fringillina, Curt. Brit. Ent. xiii. p. 5857 
Hab. Costa Rica, Rio Sucio (Rogers).—Evurors !~“, 
A single female. 
2. Ornithomyia robusta, sp.n, ¢ 2. (Tab. XIII. figg. 5; 5a, head; 
5 b, wing; 96, leg.) 
Brown ; front, antenne, and legs rufous; wings brownish-hyaline ; first vein ending in the costa above the 
small cross-vein ; fourth portion of the costa much longer than the fifth. 
Length 7 millim. 
The ocelli are less conspicuous than in O. avicularia and only recognizable in the three impressed points on the 
posterior frontal plate. Front rufous and, except the median space, very glossy, in the ¢ as broad as the 
eyes, in the 9 much broader ; antenne coniform, rufous, and hairy. Thorax reddish-brown ; the humeral 
prominences dentiform. Abdomen dark brown. Legs rufous; femora thick and, as well as the tibie, 
with long bristly hairs; the foot-claws black, strong. Wings brownish ; first vein reaching the costa 
above the small cross-vein, which stands distinctly before the middle of the wing; the auxiliary vein 
reaches the costa near the end of the first vein, the second vein close to the termination of the third (the 
third portion of the costa, that is, between the auxiliary and first veins, thus being very small and the 
fourth portion very large and much longer than the fifth); the second basal cell is a little shorter than 
the superior, and the cross-vein by which it is closed is often inconspicuous ; the inferior basal cell (anal 
cell) is trigonal and rather distinct. 
Hab. Mexico, Jalapa (Godman); Guatemata, Zapote (Champion); Costa Rica, 
Caché (Rogers); Panama, Volcan de Chiriqui (Champion). 
One male and four females. In its large size, general facies, neuration of the wings, 
&c., this species much resembles 0. columbe, Wiedem., from Java, Borneo, &c., but is 
probably distinct, the habitat being very different. 
3k 2 
