228 DIPTERA. 
6000 feet, Xucumanatlan 7000 feet, and Omilteme 8000 feet, all in Guerrero: (H. H. 
Smith), Atoyac in Vera Cruz (Schumann). Bo 
Several specimens of both sexes. 
3. Rhynchodexia tincticornis, ¢ 2. 7 ; 
Rhynchiodexia tincticornis, Bigot, Ann. Soc. Ent. Fr, 1888, p. 266. no. 64. 
Head, thorax, and scutellum cinereous ; abdomen rufous, with a black dorsal band and whitish reflecting 
spots ; antenne rufous ; legs black ; wings yellowish. 
Length 13 millim. 
Head cinereous, the front and the upper part of the cheeks with whitish, the inferior part of the cheeks with 
pale rufous, reflections ; front of the male narrowed behind, though separating the eyes on the vertex, 
that of the female broader than the eyes; frontal band rufous; external to the frontal bristles and on 
the cheeks some weak hairs; vibrissal swellings nearly parallel; oral margin scarcely prominent. 
Antenne rufous; second joint prominent, with long bristly hairs ; third joint two and a half times as 
long as the second, and showing a tendency to become brown towards the tip; arista rufous, thickened at 
the base and long-plumose. Proboscis a little longer than the head, shining black, the terminal lips 
somewhat rufous ; palpi rufous, cylindrical, slightly thickened towards the tip, especially in the female. 
Thorax and scutellum greyish-cinereous; thoracic dorsum with obsolete blackish stripes. Abdomen of 
the male conical, rufous, transparent, with white reflecting spots and a broad black dorsal band, the anal 
segment almost wholly black, the ventral surface rufous with a blackish median stripe ;—of the female 
ovate, pointed towards the anus, coloured as in the male, but not transparent; in both sexes there are 
many strong discal and marginal macrochete. Legs black, the tip of the coxee and also the tibie 
slightly rufous; femora with regularly arranged bristles ; front tibie with short, the middle and hind 
tibiee with longer, bristles ; foot-claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule 
yellowish-white. Wings with a yellow tint and rufous venation ; small cross-vein on the middle of the 
discal cell ; curvature of the fourth vein somewhat rounded ; apical cross-vein undulate; posterior cross- 
vein curved ; the fifth vein not fully reaching the wing’s margin. 
Hab. Mxxico (coll. Bigot), Paso del Macho (Hége); Costa Rica (Van Patten). 
A male specimen from Paso del Macho, a female from Costa Rica; the male agrees 
with a typical example from M. Bigot’s collection, only it is somewhat larger in size. 
4. Rhynchodexia conjuncta, sp.n., ¢. 
Blackish; cheeks, basal joints of the antenne, palpi, and sides of the abdomen rufous, the abdomen with 
whitish reflecting spots; hind tibie slightly curved. 
Length 7°5-10 millim. 
Front slightly prominent and convex, much narrowed behind (the eyes scarcely separated on the vertex), grey; 
with blackish reflections; frontal band brown; face slightly concave; cheeks and oral margin with 
rufous reflections ; the cheeks beset with fine hairs; vibrissal swellings parallel. Antenne short; the 
two basal joints and the basal half of the third rufous, the apical half of the latter black ; second joint 
prominent and with some long bristles; third joint one and a half times as long as the second; arista 
black, thickened at the base, finely plumose. Proboscis shining black, a little longer than the head; 
palpi rufous, slender. Thorax blackish; thoracic dorsum with scarcely any grey tomentum, and incon- 
spicuous black stripes; scutellum piceous. Abdomen elongate-oval, rufous, with a broad black dorsal 
band and whitish reflecting spots, which are spread not only over the black, but over the rufous colour, and 
give the appearance of irregular black spots on the dorsal band; many discal and marginal macrochete ; 
ventral surface testaceous, with the incisions and a median line blackish, and with a whitish tomentum. 
Legs black, slender, with scattered bristles; hind tibis dark rufous, slightly curved ; all the tarsi longer 
than the tibie ; foot-claws and pulvilli elongate, the pulvilli yellowish-grey, rather obscure. Tegule 
