482 SUPPLEMENT. 
white, almost silvery, head, the absence of yellow coloration on the abdomen, which is 
not at all transparent, and the shorter (not fringe-like) bristles on the hind tibie *. 
EXORISTA (p. 60). 
12. Exorista geminata. 
Masipoda geminata, Brauer & v. Bergenst. Denkschr. Akad. Wiss. Wien, lvi. p. 162 (1889)’. 
Ezorista latimana, v. d. Wulp, antea, p. 67 (1890) °*. 
The above change in the synonymy (as already noted, anted, p. 211) is required. I 
do not think that the dilatation of the front tarsi in the female, nor the ciliation of the 
hind tibiz in the two sexes, is sufficient for generic separation. 
15 (a). Exorista leuconota. 
Exorista leuconota, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 195°. 
Head and thoracic dorsum whitish; abdomen grey, with black reflections and black hind-borders to the 
segments; antenne and legs black ; proboscis yellowish-rufous. 
Length 8 millim. 
Front somewhat narrower than the eyes; frontal band only indicated by a longitudinal groove, which is a little 
enlarged above the points of insertion of the antenne ; frontal bristles few in number ; vibrisse surmounted 
by some shorter bristles; beard white. Eyes densely pilose. Antenne a little shorter than the face; 
third joint four times as long as the second ; arista thickened in nearly half its length. Thoracic dorsum 
with a whitish tomentum and obsolete dark lines; viewed in some directions it has a blackish coloration, 
and then the sides and a line on the transverse suture are white; scutellum blackish, its hind border 
grey. Abdomen conical, grey ; the first segment and the hind borders of the following segments black ; 
blackish reflections are also visible, but there is no black dorsal stripe; ventral surface blackish-grey 
with white incisions; marginal macrochetee only present. Underside of the femora with bristly hairs, 
which are longer on the first and second pairs; middle tibize with two bristles beneath; hind tibiee with 
rather long bristles. Tegule white. Wings hyaline, with a faint greyish tint ; small cross-vein on the 
middle of the discal cell; third vein arcuate before its end; apical cross-vein very slightly concave; 
posterior cross-vein nearly straight. 
Hab. Mexico}, Amula in Guerrero 6000 feet (H. H. Smith). 
A single female specimen. In its general aspect and coloration this species is 
extremely like E. flavirostris. The head, however, is more purely white and shows 
no yellowish tint; the frontal band is nearly absent; the antenne and face are shorter ; 
the eyes do not quite reach the inferior part of the head; the abdomen is not so broad 
and more conical, and has more extended blackish reflections, on account of which the 
black hind-borders of the segments are less defined and the black dorsal stripe less 
conspicuous. ‘The bristly hairs on the underside of the femora are much longer and 
more numerous; the hind tibize have outwardly a row of bristles of unequal length, 
while in EL. flavirostris these bristles are short and fringe-like, except for a longer one 
in the middle. ‘he third vein in the wings is distinctly curved. 
* [The type is now without abdomen.—Ep.] 
