MILYAS. 249 
g. Terminal genital segment produced in the middle at the apex and armed with a long, stout, pointed spine, 
which is deeply sulcate down the middle; the genital lobes rather slender and slightly sinuous, the short 
inner lobes somewhat angular at the tip. 
Length 13-133, breadth 33-33 millim. (¢ 9.) 
Hab. Mexico, Tacubaya (Bilimek, in Mus. Vind. Ces.; Sallé), Amula in Guerrero 
(H. H. Smith). 
This is one of several closely allied forms, the males of which have a long, stout, 
sulcate spine at the apex of the last genital segment. The five specimens seen agree 
exactly in coloration, the insect differing in this respect from all others of the genus. 
‘The posterior lobe of the pronotum, the lateral spines included, is rufous to near the 
base, this colour extending on each side down the pleura. 
8. Milyas mexicanus,n.sp. (Tab. XV. figg.9,¢; 94, last genital segment, 3 .) 
Elongate, pilose, stramineous, the legs, abdomen, and pronotum suffused with ochreous ; the head black above, 
with a small spot between the ocelli and another in front, and in one specimen some marks on each side 
between the eyes, stramineous; the pronotum with a rather broad transverse fascia before the base, 
extending to the lateral spines, the longitudinal medium sulcus, and the disc of the anterior lobe, except 
four transversely placed spots, black; the scutellum black at the base; the elytra fuscous, or fusco- 
testaceous; the abdomen above and beneath, and the basal joint of the rostrum, banded with black; the 
antenn with joints 1 and 2 black, 1 narrowly tri- or quadriannulated with stramineous, 2 with a pale 
median ring, 3 and 4 obscure ferruginous; the legs rather broadly annulated with black ; the pleura and 
the sides of the ventral segments each with a row of tomentose white spots. Head moderately long ; 
antenne with joint 1 about twice as long as 2, 2 and 4 subequal, 3 much longer than 2. Pronotum 
smooth, sulcate down the centre from the middle of the posterior lobe to the apex; the anterior angles 
armed with a short, stout tooth, the lateral angles with a short outwardly directed spine; the base feebly 
bisinuate in the middle, the reflexed margin rather prominent and slightly sinuate towards the sides. 
Scutellum with the apex strongly foliaceous. Legs rather stout, moderately elongate. 
3d. Terminal genital segment armed with a short slender spine; the genital lobes stout, clubbed, the short 
inner lobes rounded at the tip, both clothed with numerous long hairs. 
Length 11-14, breadth 3-33 millim. 
Hab. Mexico, Ventanas in Durango (Forrer), Tepic (Schumann). 
Two males. Very like WV. zebra, and, like it, with a sulcate spine at the apex of the 
last genital segment in the male; the genital lobes, however, in this sex are stout and 
clubbed at the tip. 
9. Milyas lineaticeps, n. sp. (Tab. XV. figg. 10,3; 104, last genital seg- 
ment, ¢ .) 
Moderately elongate, sparsely pilose, pale stramineous; the head with the post-ocular portion variegated with 
black, the black markings enclosing a diamond-shaped spot between the ocelli and a median line running 
down from it to the base, the ante-ocular portion with a subquadrate black mark in the centre; the 
anterior lobe of the pronotum variegated with rufo-testaceous, the lateral spines black, the basal margin 
in one specimen marked with black near the hind angles; the abdomen above and beneath, and 
the basal joint of the rostrum, banded with black; the elytra testaceous, the membrane subhyaline ; the 
antennw with joints 1 and 2 black, 1 broadly quadriannulated with stramineous, 2 with a narrow basal 
and a broader median stramineous ring, 3 and 4 ferruginous ; the legs narrowly annulated with black. 
Head moderately long ; antenne With joint 1 about twice as long as 2, 2 and 4 subequal, 3 one-half longer 
BIOL. CENTR.-AMER., Rhynch., Vol. II., June 1899. 32 
