330 . DIPTERA. 
dorsal line. The arista is slightly pubescent. The wings are brownish-hyaline; the posterior cross-vein 
is slightly sinuate. 
Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, and Sierra de las Aguas / 
Escondidas 9500 feet, all in Guerrero (H. H. Smith). 
Seven male specimens. 
5. Leucomelina garrula. (Tab. VIII. fig. 9, 3.) 
Leucomelina garrula, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 18’. 
Eyes separated by a linear front (3); thorax black, with two stripes on the prothorax and two lateral bands 
white; anal segment cinereous ; wings brownish ; posterior cross-vein oblique. 
Length 7 millim. 
This and the following species (Z. minuscula) differ (in the male sex) from all the preceding in having the eyes 
not quite contiguous, but separated by a narrow black front. L. garrula bears a striking resemblance to 
L. pica, and may be distinguished from it, apart from the above-mentioned difference in the form of the eyes, 
by the presence of two white stripes on the prothorax. The wings are brownish, darker along the costa. 
Hab. Mexico}, Sierra de las Aguas Escondidas 7000 feet and Omilteme 8000 feet, 
both in Guerrero (H. H. Smith). 
Seven male specimens. 
Some females from the same localities and one from Cuernavaca in Morelos 
(H. H. Smith) seem to belong to this species, as they agree with it in the large size, 
the brownish wings, and the cinereous anal segment; the thoracic dorsum in these 
females is cinereous, with three broad, somewhat irregular, black stripes. 
6. Leucomelina minuscula, sp. n., ¢ ¢. 
Eyes separated by a linear front (3); thorax black, with two stripes on the prothorax and two lateral bands 
white ; anal segment cinereous; wings hyaline; posterior cross-vein nearly perpendicular. 
Length 3°5 millim, 
Of much smaller size than any of the other species of this genus, for the rest agreeing in most respects with 
L. garrula, The head is more pure white, and the narrow front (¢) is bordered by linear white orbits ; 
the black spots on the second and third abdominal segments are less extended and more perfectly 
triangular; the wings are not infuscate; the position of the posterior cross-vein is more perpendicular ; 
and the curvature of the fourth vein is less marked. The female specimens which I consider to belong 
here conform with the males in their small size, hyaline wings, and neuration; the thorax may be 
described as whitish, with five black bands, three dorsal and one on either side of the pleura. 
Hab. Mexico, Atoyac in Vera Cruz and Xucumanatlan in Guerrero (1. H. Smith). 
‘two male and seven female specimens. The females much resemble the same sex of 
Limnophora delecta (anted, p. 325), but may be distinguished from them by the white 
markings on the thorax. 
TRICHOPHTHICUS. 
Trichophthicus, Rondani, Dipt. Ital. Prodr. iv. p. 9 (1861), and vi. p. 145. 
The characters of this genus are :—Eyes distinctly pilose, in the male contiguous ; 
antenne short, the third joint nearly equal to the second in length; arista bare or 
