DEJEANIA.—HYSTRICIA. 
li 
Besides the above-mentioned species the following one is described from Mexico :— 
Dejeania analis, Macq. Dipt. Exot. ii. 3, p. 34. 3, t. 3. £3. 
(Syn. Echinomyia 
analis, Bigot in Sagra’s Hist. fisica polit. y nat. de Cuba, vii., Ins. 
p- 340.—Cuba.) . 
HYSTRICIA. 
Hystricia, Macquart, Dipt. Exot. ii. 3, p. 43 (1848). 
This genus is closely allied to Dejeania; but the proboscis is not so long, and the 
palpi, though perfectly developed, are notably shorter than it. 
The eyes are distinctly 
pubescent. 
The Central-American species known to me may be distinguished in the following 
manner :— 
1. Legs black 2. 
Legs fulvous or yellow . . . woe ee 7. 
2. Palpi black; abdomen grey, with black reflections . albiceps, v. d. Wulp. 
cu 
10. 
Palpi fulvous ; abdomen unicolorous, shining black, piceous, or 
metallic 
. Base and costa of the wings fuscous ; spines of the abdomen few 
in number and regularly ranged . woe eee 
Wings unicolorous (sometimes yellowish at the base and costa, 
or blackish at the extreme base, but never with a fuscous 
portion) ; abdomen densely beset with spines 
. Thorax and scutellum greyish-yellow . . . 
Thorax and scutellum blackish, the thorax sometimes with grey 
tomentum . 
. Abdomen bluish- black, almost stecl-blue 
Abdomen black or piceous . 
. Third joint of the antenne as long as Or but little longer than 
the second . soe eee . . 
Third joint of the antenne . three or four times as long as ‘the 
second . 
. Abdomen black, with light ¢ grey incisions or r dorsal spots 
Abdomen red or yellow, sometimes with black markings 
Thorax blackish-grey, with indistinct longitudinal stripes . 
Thorax light cinereous, with distinct longitudinal stripes 
. Antennze and tarsi black . 
Basal joints of the antenne and the tarsi fulvous - oe oe 
Lateral borders of the second and third abdominal segments 
densely beset with black spines; middle tibize outwardly with 
several long macrochete . . . . . 
Lateral borders of the second and third abdominal segments only 
with a few (two or three) black spines; macrochete of the 
middle tibie not longer than those of the front and hind 
tibize 
3. 
infuscata, v. d. Wulp. 
4, 
ambigua, Macq. 
5. 
cyaneiventris,v.d.Wulp. 
6. 
pollinosa, v. d. Wulp. 
soror, Will. 
velutina, v. d. Wulp. 
8. 
9. 
10. 
amena, Macq. 
micans, v. d. Wulp. 
abrupta, Wiedem. 
ll. 
c2 
