HYETODESIA. 315 
2. Hyetodesia mulcata. 
Hyetodesia mulcata, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 20°. 
Hab. Mexico}, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith). 
A single male specimen from Guerrero. This has the face and frontal margins 
whitish, not silvery; the black stripes on the thorax equally distinct before the 
transverse suture, the two median stripes not narrower than the outer ones; and the 
hind femora black, with a rufous tip, like the other femora. Notwithstanding these 
discrepancies from the description, the example before me is probably referable to 
H. muleata. 
3. Hyetodesia procedens. 
Aricia procedens, Walk. Trans. Ent. Soc. Lond. n. ser. v. p. 315 *, 
Hyetodesia procedens, Gigl.-Tos, Mem. R. Accad. Scienze di Torino, ser. 2, xlv. (sep.) p. 20”. 
Hab. Mexico 12, Sierra de las Aguas Escondidas in Guerrero 9500 feet (H. H. Smith). 
Five female specimens. Walker’s description applies to these, except that the head 
is not white, but obscure cinereous. The black spots on the abdomen are placed two 
on the second and two on the third segment, and, in addition, all the segments have, 
at the sides, blackish reflecting spots. ‘The femora have on the upperside a black 
stripe, which on the front pair extends over their whole length, but on the middle and 
hind pairs only towards the tip. The wings are brownish-grey and have a small 
costal spine. 
I suspect that H. mulcata and H. procedens are the two sexes of the same species. 
Save the usual sexual ditferences, and the much more exteuded rufous coloration of 
the legs in H. procedens, they are very similar. Moreover, the specimens before me. 
are all from the same locality and captured in July. 
4, Hyetodesia longiseta, sp. n., ¢. 
Cinereous; thorax with four black stripes ; abdomen with four black spots; antenne, palpi, and legs rufous, 
the tarsi and base of the front femora black. 
Length 7 millim. 
Eyes short-haired, contiguous on the front, which is reduced to a small triangle; face cinereous, with some 
white reflections; vibrisse just at the oral margin, which is not prominent; cheeks narrow ; underside of 
the head with many bristly hairs. Antenne inserted on the median line of the eyes, brownish-rufous, 
the basal joints nearly black; third joint not reaching the vibrisse ; arista distinctly longer than the 
antenne, short-plumose. Palpi rufous, small. Thorax, scutellum, and abdomen cinereous; on the 
thorax before the transverse suture are four black stripes, the two median sometimes appearing double. 
Abdomen ovate; second and third segments each with two triangular black markings; anal segment and 
the sides of the preceding segments with blackish reflections ; third segment with a row of marginal 
macrocheetee ; several macrochet and bristly hairs on the surface of the anal segment and laterally on 
all the other segments. Legs slender, rufous; the coxe, the base of the front femora, and all the tarsi 
black ; middle femora narrowed towards the apex, with a row of bristles on the underside; the other 
femora with bristles on the upper and under sides ; tibie with three or four spurs, the middle and hind 
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