426 DIPTERA. 
rather narrow ; occiput whitish-grey. Antenns, proboscis, and palpi rufous; the antenne reaching to 
beyond the middle of the face. Thorax and scutellum cinereous; thoracic dorsum with yellow hairs. 
Abdomen conical, shining black; ovipositor of the same colour, flattened, truncated, as long as the last 
two segments united. Legs pale rufous; fore femora with some yellow bristles on the underside. 
Halteres yellow. Wings rather broad; the base, including the second and third basal cells, hyaline, with 
some brownish spots ; the rest of the surface fuscous, with hyaline marginal incisions and clear dots of 
different sizes ; stigma black, with a clear stripe at the end of the auxiliary vein; beyond the stigma two 
hyaline incisions, the second of which is prolonged by a large hyaline dot between the second and third 
veins ; at the tip of the wings some large hyaline incisions; the hind margin fuscous, with a row of 
small semicircular incisions; a white dot between the first and second veins, just under the end of the 
costal cell; a similar dot in the first basal cell, and a very large one between the fifth and sixth veins ; 
several small clear dots are in the discal cell and in the apical portion of the wings: in the first posterior 
cell is a blackish callous spot. 
Hab. Mexico, Xucumanatlan in Guerrero (H. H. Smith). 
A single female. ‘To the same species must be referred a 
male (without head) from Orizaba (H. H. Smith). This 
species has similarly-coloured wings, but the abdomen is 
cinereous, with two black spots on each segment, the apical &. sobrinata, vd, W. 
one being shining black. 
URELLIA. 
Urellia, Robineau-Desvoidy, Essai sur les Myodaires, p. 774 (1830). 
1. Proximal half of the wings with a faded greyish reticulation. . . . . . abstersa, Low. 
Proximal half of the wings hyaline, without reticulation . . . . . . . Q, 
2. In the discal cell two fuscous rays . . . 2... ww ee, polyclona, Low. 
In the discal cell only a single fuscous ray. . . 3. 
3. The black spot on the distal half of the wing extended inwards over ‘the 
small cross-vein and covering the stigma . . . . . eugenia, v. d. W. 
The black spot on the distal half of the wings not extended inwards, ‘the 
stigma only crossed by an oblique ray . . A. 
4. Small cross-vein not covered by the black spot on the distal half of ‘the 
wings; fifth vein not spotted . . . . . . . . . solaris, Liw. 
Small cross-vein covered by the black spot on the distal half of the wings; a 
fuscous dot on the fifth vem. . 2. 2... 2... et; vicina, v. d. W.. 
1. Urellia abstersa. 
Trypeta abstersa, Liw, Dipt. Amer. sept., Cent. ii. no. 771; Monogr. Dipt. N. Amer. iii. p. 322, 
t. ll. fig. 7°. 
Hab. Norta America’,—Mexico, Mexice city (H. H. Smith). 
—CuBa *. 
A single female specimen of this species has been received 
from Mexico. U. abstersa, Low. 
2. Urellia polyclona. 
Trypeta polyclona, Low, Monogr. Dipt. N. Amer. iii. ps 324 '. 
