60 DIPTERA. 
8. Meigenia gratiosa, sp. n., 3. 
Ochraceous; stripes on the thorax, base of the scutellum, hind borders of the abdominal segments, antennsy, 
and legs black; palpi rufous. 
Length 6 millim. 
Head cinereous; front narrowed behind; frontal band blackish ; frontal bristles descending on both sides in 
asingle row to beneath the second antennal joint ; eyes beneath not reaching the vibrissx, densely clothed 
with short pile, which is whitish on the upper part and more obscure below; vibrisse surmounted by 
several bristles; beard white. Antenne shorter than the face; second joint with some short and rough 
bristles ; third joint three times as long as the second ; arista thickened on the proximal half. Proboscis 
black; palpi pale rufous. Thorax, scutellum, and abdomen ochraceous; thoracic dorsum with five black 
stripes, the three median stripes linear; base of the scutellum black. Abdomen conical; first segment 
black ; second and third segments with black hind borders, which anteriorly are drawn out into three 
branches, the lateral branches the broadest and somewhat trigonal ; anal segment in the middle and at the 
tip black, beneath with a black spine, which is turned towards the venter; ventral face blackish ; discal and 
marginal macrochete present. Legs with delicate bristles, those of the middle tibie longer, those on the 
outside of the hind tibie of unequal length ; foot-claws and pulvilli elongate, the pulvilli greyish. Tegule 
yellow. Wings greyish, slightly infuscated at the base and costa; small cross-vein on the middle of the 
discal cell; apical cell ending a little before the wing’s tip; apical cross-vein nearly straight ; posterior 
cross-veln curved. 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 
A single male specimen. 
EXORISTA. 
Exorista, Meigen, Ill. Magaz. ii. p. 280 (1803). 
Of this genus, which I adopt in the sense of Schiner (‘ Fauna austriaca,’ i. p. 457), I 
have before me examples of several species from Central America, none of which can be 
identified with either of those yet described. They may be distinguished as follows :— 
1. Second and third abdominal segments with discal and marginal 
macrochete*. . . . . oe . woe ew we 
Second and third abdominal segments without discal and only 
with marginal macrocheetz, sometimes even these latter absent 9. 
2. Palpiblack ©. 2. 2. 1. 1. ee 1 ew ee ee ee  .  obscurata, v. d. Wulp. 
Palpirufous . ... . rr Pe 
3. Thorax unicolorous black, without stripes . . . . . . . wnicolor, v. d. Wulp. 
Thorax grey, cinereous, or ochraceous, with more or less con- 
spicuous dark stripes . . . 4. 
4, Abdomen with rather narrow and sharply limited black hind 
borders to the segments . . . . 2... ee ee OD 
Abdomen otherwise marked. . . . . . ...... 6 
5. Ground-colour ochraceous . . . . . . . « « . « « ochracea,y. d. Wulp. 
Ground-colour cinereous, the last two abdominal segments 
bluish 2. 2. we. ew we we... c@ruleiventris, v. a. Wulp. 
* In E. unicolor the macrochztz, and especially the discal ones, are very short and less conspicuous between 
the pilosity of the abdomen. 
