May, 1912.] New Species North Avieriean Tahanidae. 5^5 



Tabanus fulvistriatus n. sp. 



Female, length 8 millimeters. Antennec yellow, sides of the 

 front nearly parallel, frontal callosity shining blaek, 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 brow^n 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 

 antenna which show only three annulations in the third segment 

 instead of five, although this last character shows some tendency 

 to vary. Eyes 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 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. 



