50 DLPTEKA. 



on the vertex. Face brownish-yellow. Palpi long and very narrow, almost linear, 

 brownish-yellow, densely clothed with minute black hairs. Antennae pale red ; third 

 joint with a flat excision, its upper angle forming a sharp, rectangular projection, but 

 not drawn out in a point ; annulate portion black. Thoracic dorsum pale brown, 

 with two yellowish-white longitudinal lines, expanding, but evanescent posteriorly, 

 and coalescing in front of the scutellum with the pale lateral margins ; the intervals 

 between these pale markings forming three more or less distinct brown stripes, which 

 do not reach the scutellum, the intermediate one being the broadest. Pleurae and 

 legs pale brown, the front legs darker ; front tarsi, and the tips only of the hinder ones, 

 dark brown. Abdomen brownish-red, a little more brown towards the end, with thin 

 fringes of short yellow hair on the hind margins of the segments. Halteres yellowish- 

 brown, the knob more yellow. Wings subhyaline, with reddish-yellow veins and brown 

 bands and spots, the extreme root hyaline ; a light-brown band across the proximal 

 portion of the basal cells ; a brown spot at the distal end of the first basal cell coalesces 

 with the second cross-band ; the latter begins from the elongated, dark brown stigma 

 and bifurcates in the first posterior cell ; the proximal branch takes an irregular course 

 across the discal and the fourth and fifth posterior cells towards the anal cell; the 

 much shorter distal branch enters the second posterior cell and fades away beyond it, 

 connecting with the proximal branch, and emitting more or less distinct rays along the 

 wing-veins ; a brown spot at the proximal end of the second submarginal cell ; first 

 posterior cell broadly open ; fork not appendiculate. Three female specimens. 



N.B. — A fourth female from British Honduras (Blancaneaux) agrees in everything 

 except that the brown spot within the fork is wanting ; the tips of the antennae are red, 

 and the segments of the abdomen have distinct and rather broad yellowish margins. 

 Is it a different species 1 



The eyes (revived on wet sand) are dark purple, unicolorous. 



T. ebrius has a superficial resemblance to T. potator, Wied., but the latter has the 

 upper angle of the third joint of the antennae drawn out in a long point. 



Tabanus alteripennis, Walker, Trans. Ent. Soc. Lond. n. ser. v. p. 274 (from Mexico), 

 represented by a single specimen in the British Museum, is perhaps a mere variety of 

 T. ebrius, in which the brown spots on the wings are more confluent. 



5. Tabanus erebus, sp. n., ? . 



Altogether black, including the wings ; knob of the halteres whitish-yellow ; frontal callus narrow, almost 

 linear ; subcallus flat, opaque ; first posterior cell broadly open ; upper corner of the third antennal joint 

 drawn out in a long point. 



Length 19-23 miUim. 



Hab. Nicaeagua, Chontales (Janson); Panama, Volcan de Chiriqui 2000 to 4000 

 feet (Champion). 



Face and cheeks subopaque; proboscis rather long, with long lips; palpi long, 

 narrow; third antennal joint with a distinct projection on the underside, deeply 



