May, 1912.] New Species North American Tabanidae. 
5 1 5 
Tabanus fulvistriatus n. sp. 
Female, length 8 millimeters. Antennae yellow, sides of the 
front nearly parallel, frontal callosity shining black, prominent, 
occupying "the entire width of the front and with a raised line 
connects with the upper side. A denuded spot at vertex but no 
ocelli present. Thorax brown without stripes, wings dilute 
brownish; legs largely yellow, front femora brown, apial half of 
front tibiae and entire tarsi black, other legs with each tibia 
narrowly brown at apex and each tarsus almost wholly black 
beyond the apex of the metatarsus. Abdomen brown in ground 
color, a wide middorsal stripe and lateral and hind margins of the 
segments pale yellow; venter pale at base, darkened toward 
the apex. 
The type female and one other specimen taken at Dona Maria, 
Chiapas, Mexico, by D. L. Crawford. 
This fly shows some resemblance to Tabanus unistriatus of 
Costa Rica and appears to be related to T. maculifrons of Guate- 
mala. The small size, together with the wide middorsal abdom- 
inal stripe easily designates the species however. 
Merycomyia n. gen. 
Closely resembling Tabanus, but distinct on account of the 
presence of well developed ocelli in both sexes and the anomalous 
antennas which show only three annulations in the third segment 
instead of five, although this last character shows some tendency- 
to vary 7 . Ey 7 es naked, no spurs at the apex of the hind tibia, wing 
venation as in Tabanus, anal cell closed and petiolate. No 
stump on the anterior branch of the third vein. Type species 
Merycomyia geminata. 
There are in my collection three specimens of two distinct 
species of this genus. I have held these specimens a long time 
and have compared many 7 descriptions without finding anything 
that suited, hence the conclusion to refer them to a new genus. 
Merycomyia geminata n. sp. 
Male, length 21 millimeters. A dark colored species with pale 
brownish wings. Third segment of the antenna largely reddish, 
proboscis short and dark colored, eyes contiguous, ocelli promi- 
inent. Thorax dark colored with the usual gray stripes, all the 
femora dark reddish, tibiae darker, tarsi black;" wings brownish 
gray with the veins in the anterior part quite plainly margined 
with brown. Abdomen nearly black, slightly reddish on the sides, 
fourth segment with a large transverse gray patch which is plainly 
indented anteriorly on the middorsal line by a black triangle, fifth 
segment with two small gray spots. 
