CNEPHALIA.—NEMORAA. AT 
above the vibrisse are four bristles on the facial ridges; cheeks without black hairs; beard and pilosity 
of the occiput whitish; eyes bare, a row of short black bristles behind them. Antenne longer than in 
the preceding species; basal joints rufous; third joint black, with rufous base; second joint elongate, 
bristly ; third joint twice as long as the second; arista indistinctly jointed, thickened to near the tip. 
Proboscis blackish ; palpi rufous, thickened towards the end. Thorax blackish, before the transverse 
suture with whitish-grey tomentum and two black lines; pleurs greyish; scutellum testaceous. Abdomen 
short ovate, very convex; first segment black; second segment blackish, with grey reflections and a 
white front margin, laterally rufous, slightly transparent; third segment yellowish-grey, with brown 
reflections on the hind margin; anal segment short, pale ochraceous ; macrochetz as in the preceding 
species. Legs black; shorter and more robust than in C. onusta, but with similar bristles ; foot-claws 
and pulvilli short. Tegule white. Wings brownish-grey, intense yellow at the base; venation like that 
of C. onusia. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
A single female example. 
Another female specimen, from Tuxpango, in the collection of Prof. Bellardi, 
‘agrees with the one from Teapa; it has, however, the third abdominal segment not 
yellowish, but of the same greyish coloration as the second segment—the pale ochra- 
ceous anal segment, therefore, contrasts more in coloration with the rest of the 
abdomen. 
4, Cnephalia ochriventris, sp. n., 9. 
Ochraceous; head white; frontal band, palpi, and base of the antenne rufous; thoracic dorsum yellowish- 
cinereous, anteriorly with black lines. 
Length 11 millim. 
Allied to C. obesula, and agreeing with it in almost all its characters ; but differing in the ochraceous coloration. 
The scutellum and the abdomen are concolorous ; the ochraceous coloration on the latter is partly varied 
by brownish reflections, which in one example give the appearance of a dark dorsal stripe and brown hind- 
borders to the segments. 
Hab. Mexico, Tierra Colorada 2000 feet and Amula 6000 feet, both in Guerrero 
(H. H. Smith). | 
One female example from each locality. 
NEMORAEA. 
Nemorea, Robineau-Desvoidy, Essai sur les Myod. p. 71 (1830). 
This genus includes a large number of European species, but seems to be less 
numerously represented in the New World. Osten Sacken (‘Catalogue of the 
described Diptera of North America,’ p. 150) enumerates no more than six species ; 
and three of these (WV. masurius, Walk., N. clasides, Walk., and WN. triroides, Walk.) do 
not seem to belong to this genus, the eyes not being hairy in either of them. From 
South America three species have been described—W. pictipennis, Macq., from Colombia, 
N. brasiliensis, Schin., from Brazil, and NV. erythropyga, v. d. Wulp, from Chile. 
In the Central-American collections before me there are five species, which I must 
consider as yet undescribed. They may be distinguished as follows :— 
