398 DIPTERA. 
Head rounded; front a little narrower than the eyes, with parallel sides, rufous, laterally short-haired ; 
face pale rufous, in the middle metallic blue; clypeus rufous; vertex metallic blue, with rather long 
bristles ; occiput brownish-rufous. Antenne rufous; third joint oval. Proboscis brown. Thorax metallic 
greenish-blue, the dorsal surface with some yellowish dust; scutellum bluish-black, its hind border rufous, 
with two long bristles. Abdomen flattened, attenuated posteriorly, metallic greenish-blue. Legs rufous, 
the middle and hind femora brownish; the tip of the hind tibie and the terminal four joints of all 
the tarsi infuscate. Halteres yellow. Wings hyaline, with four blackish cross-bands: the first near the 
base very small, at the humeral cross-vein ; the second and third much enlarged towards the hind margin ; 
the fourth, in the form of a large spot at the tip of -the wing, broader than the hyaline space before it ; 
the second cross-band is limited on its outer side by the small cross-vein ; the third cross-band covers 
the posterior cross-vein ; the third and fourth veins are slightly convergent towards the tip of the wing. 
Hab. Mexico, Cuernavaca in Morelos (H. H. Smith). 
Two males. A female specimen from Tierra Colorada in Guerrero (//. H. Smith) 
seems to belong here, the pattern of the wings being quite similar; but it has the 
whole scutellum and the third and fourth abdominal segments rufous and the legs 
not infuscate. It is perhaps not fully coloured. ‘The flattened basal joint of the 
ovipositor is shining black; the second and third joints are lanceolate, very thin and 
long, and pale rufous towards the tip. 
4. Kuxesta fascipennis, sp.n., ¢ 2. (Tab. XI. fig. 10, wing.) 
Metallic bluish-black ; front and antenne rufous; legs blackish; wings hyaline, with four blackish cross- 
bands, the second and third much enlarged towards the hind margin, the fourth at the tip of the wing 
and narrower than the hyaline space before it. 
Length 3°5 millim. 
Closely allied to the preceding (Z. latifasciata) and agreeing with it in most of its characters. The metallic 
coloration is more obscure, but on the face it is more extended; the tip of the scutellum is not rufous ; 
the abdomen is more shining black; the legs are blackish, the femora with metallic green reflections, the 
base only of the tarsi rufous (in one of the specimens, perhaps a not fully coloured one, the legs are 
rufous). The second and third cross-bands on the wings, though enlarged towards the hind margin, are 
narrower than in E. latifasciata, and the hyaline space between the third and fourth is much broader than 
the bands themselves. The apical joint of the ovipositor of the female is cylindrical and rufous. 
Hab. Mexico, Orizaba (H. H. Smith & F. D. Godman), Tepetlapa in Guerrero 
3000 feet, Medellin near Vera Cruz, Teapa in Tabasco (/7. H. Smith). 
Seven males and three females. 
5. Kuxesta major, sp.n.,¢. (Tab. XI. fig. 11, wing.) 
Thorax dark green; abdomen reddish-brown ; face metallic blue; wings hyaline, with four blackish cross- 
bands. 
Length 7-5 millim. 
Front as broad as the eyes, with parallel sides, brown, immediately above the antenne rufous; vertex metallic 
green, on each side of the front a double row of short bristly hairs, the ocellar and post-vertical bristles 
much longer; face and clypeus metallic blue; cheeks rufous; occiput black; the posterior orbits of the 
eyes whitish. Antenne rufous; third joint oval, infuscate towards the tip. Proboscis black, with 
rufous terminal lips; palpi rufous. Thorax metallic blackish-green, the dorsal surface with some greyish 
dust ; scutellum triangular, metallic green, with two apical bristles. Abdomen reddish-brown, the sides 
of the first three segments slightly metallic, the last segments shining black. Legs dark rufous; femora, 
except the base and the tip, metallic greenish-black. Halteres yellow. Wings hyaline, with four 
