DIPTERA. 479 
3. Nemocheta nitida. 
Nemocheta nitida, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194°. 
Shining black; head whitish; palpi and at least the basal joints of the antenne rufous; tegule and base of 
the wings dark fuscous. 
Length 10 millim. 
Distinguished by the shining black coloration ; the thorax, however, has some white tomentum on its front 
margin and on the shoulders. The head is yellowish-white, the front cinereous; frontal band brown, a 
little narrowed behind, reaching neither the root of the antenne nor the vertex; frontal bristles descending 
irregularly on both sides to as far as the middle of the second antennal joint; cheeks with some hairs 
near the eyes; beard and pilosity of the occiput pale yellow. Antenne rufous; third joint as long as the 
second, convex on the front side and black for the most part. Proboscis black; palpi pale rufous. 
Scutellum piceous. Abdomen convex; macrochate robust, on the hind margins of the second and third 
segments and on the whole surface of the fourth segment. Legs black, with many bristles, those on the 
outer side of the posterior, and especially of the middle, tibia very long and stout ; front tarsi not dilated 
in the female; foot-claws black, pulvilli yellowish ; in the male the claws and pulvilli elongate. Tegule 
brown. Wings greyish hyaline, the base up to beyond the humeral cross-vein and to the end of the two 
inferior basal cells dark fuscous; small cross-vein infuscated, under the middle of the mediastinal cell 
and a little before the middle of the discal cell; apical and posterior cross-veins oblique and slightly 
curved. 
Hab. Mexico !, Cuernavaca in Morelos (1. H. Smith). 
Three males and one female. 
4. Nemocheta infuscata. 
Nemocheta infuscata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 194°. 
Body and legs black; head whitish; antenne rufous, the third joint brown at the tip; palpi ochraceous ; 
tegule, base of the wings, and the proximal part of the costa dark fuscous. 
Length 10°5 millim. 
Nearly allied to N. nitida: the grey tomentum of the thorax is more extended; the abdomen is less shining 
and has a piceous tint ; the dark coloration of the wings covers not only the two inferior basal cells, but 
also the whole superior basal cell and reaches on the costa to as far as the end of the first vein. 
Hab. Murxico1, Teapa in Tabasco (H. H. Smith). 
A single female specimen. 
GONIA (p. 39). 
Gonia mexicana (p. 40). 
To the locality given, add :—Mexico, Rincon, Amula, and Xucumanatlan in Guerrero 
(A. H. Sinith). 
GYMNOCH ETA (p. 40). 
Gymnocheta reinwardti (p. 40). 
To the localities given, add :—-Mexico, Teapa in Tabasco (H. H. Smith). 
A female from Teapa agrees well with the male previously recorded by me, and, 
like it, has the head yellow. ‘The antenne, however, are rufous (not black, as indicated 
in Wiedemann’s description), and it is probable that they vary in colour. 
og 2 
