432 DIPTERA. 
3. Ornithomyia pilosula, sp. n., 9% (Tab. XIII. figg. 6, head; 6a, wing.) 
Head and thorax rufous; abdomen dark brown; legs yellowish, hairy ; wings brownish-hyaline ; first vein 
ending in the costa above the small cross-vein ; fourth and fifth portions of the costa nearly of the same 
length. 
Length 5:5 millim. 
Agrees in most respects with the European O. avicularia: the front is broader than the eyes; the semilunular 
plate before the antenne has a rather deep impression ; the ocelli are distinct ; the end of the auxiliary 
vein is close to that of the first vein ; and the inferior basal (anal) cellis present andcomplete. It differs, 
however, in having longer and more numerous hairs on the femora and tibie, the somewhat more elongate 
form, and also in the neuration: the first vein ends in the costa just above the small cross-vein, the 
latter being more retracted towards the base of the wing; the fourth portion of the costa (between the 
first and second veins) is as long as the fifth (between the second and third veins). 
Hab. Costa Rica, Volcan de Irazu (Rogers). 
A single specimen. 
The following Hippoboscide have been described from Mexico :— 
Trichobius dugesit, Towns. Ent. News, ii. pp. 105, 106 (1891); iii. p. 177 (1892). 
—Guanajuato. 
Found by Dr. Alfred Dugés on a species of bat, Glossophaga soricina. 
Lipoptena depressa, Say, var. mexicana, Towns. Ann. & Mag. Nat. Hist. (6) xx. 
p. 289 (1897).—Paso de Telaya, Vera Cruz. 
153 specimens taken, together with puparia, from the ventral region, 
hind-quarters, and sides of a white-tailed deer, Cariacus virginianus, 
var. mexicanus. 
