360 DIPTERA. 
head, brown, separated at their base by a protuberance of the front; first joint rufous, short; second 
joint very slender and elongate, cylindrical, slightly enlarged towards the tip, with black hairs on the 
upper and under sides; third joint one-half the length of the second, pointed towards the tip; arista 
bare, the basal half blackish, for the rest white. Proboscis brown ; palpi pale rufous, slender. Thoracic 
dorsum cinereous, with two brown lines; pleure grey ; scutellum obscure cinereous. Abdomen shining, 
bluish-black. Legs, including the fore coxe, rufous; middle and hind cox grey; femora with black 
tips; hind femora robust, much longer than the abdomen, with a black ring behind the middle, and with 
a row of short spines beneath; middle femora also with similar, but very minute, spines; tibiee with 
black tips; tarsi brownish-black. Halteres rufous. Wings greyish-hyaline, yellowish along the costa ; 
emall cross-vein a little before the middle of the discal cell ; posterior cross-vein slightly curved. 
Hab. Mexico, Vera Cruz (H. H. Smith). 
Two female specimens. 
3. Sepedon nubilipennis, sp.n. 3 ¢. (Tab. IX. figg. 14,3 ; 14a, head in 
profile.) 
Rufous; head with black and white dots; second antennal joint longer and narrower than the third; wings 
clouded towards the tip. 
Length 5-6°5 millim. 
Front rufous, somewhat excavated in the middle and with a brown median band ; ocellar point and two rounded 
spots near the orbits black ; face and cheeks pale rufous, shining, with some silvery-white spots, the face 
concave ; oral margin sharply projecting ; a black central point and two black dots beneath the antenna, at 
a short distance from the orbits. Antenne rufous, longer than the head ; second joint slender, cylindrical, 
short-haired on the upper and under sides ; third joint shorter than the second, its basal part thicker, the tip 
blackish; arista white, with a white pubescence. Proboscis and palpi rufous. Thorax, scutellum, and 
abdomen brownish-rufous ; thoracic dorsum and pleurs: with numerous fine brown points; abdomen with 
a brown, interrupted dorsal band. ‘Legs rufous; tips of the femora and tibie black; tarsi brown, the 
terminal joints black; hind femora slightly thicker than the others, in the male a little longer, in the 
female shorter than the abdomen, at the underside towards the end with some short bristles, Halteres 
- pale rufous. Wings greyish-hyaline, yellowish at the base ; mediastinal cell and a border along the costa 
prownish-grey; this latter colour largely and irregularly extended round the tip, leaving several more 
transparent spots; small cross-vein on the middle or a little beyond the middle of the discal cell; posterior 
cross-vein slightly curved or nearly straight. 
Hab. Mexico, Presidio de Mazatlan (Forrer), Atoyac in Vera Cruz (1. H. Smith). 
A male specimen from Atoyac, and a female from Presidio. 
Of the group Sciomyzine, the following species have also been described from 
Mexico :— _ 
Dryomyza maculiceps, Walk. Trans. Ent. Soc. Lond. new series, v. p. 319. 
Tetanocera pectoralis, Walk. loc. cit. p. 321. 
Sepedon premiosus, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep. ) 
p. 38. 
Group PSILINZ. 
Elongate flies, without bristles, except some short and weak ones on the vertex and 
on the scutellum; vibrisse absent. Antenne incumbent, sometimes (gen. Loxocera) 
with a very long terminal joint. Tibie without a preapical bristle; the middle pair 
