128 HETEROMERA. 
joints very elongate, 11 slightly emarginate at the middle; prothorax subquadrate, at least as wide at the 
base as at the apex, the sides a little rounded in front and, at most, moderately constricted behind ; elytra 
considerably broader than the prothorax, elongate and parallel, with regular raised lines or coste ; legs very 
long and slender, the tibiz each with two rather long spurs; joints 1-4 of the anterior and intermediate 
and 3 of the posterior tarsi, more or less (V. eneipennis), or the penultimate one only of all the tarsi 
(V. sordidus and V. costatus), spongy-tomentose beneath; claws simple. Male with the fifth ventral 
segment very deeply triangularly emarginate; the ventral portion of the sixth segment with a spatuli- 
form lobe on each side which extends beyond the fifth segment (this being very long in V. enetpennis 
and short in V. costatus), the dorsal portion furnished on each side with a quite slender and very much 
shorter lobe, each of the lobes fringed with long hairs at the apex. 
Closely allied to and of the general form of Xanthochroa; but differing in the 
anterior tibie having two spurs, and in the antenne being 11-jointed in both sexes, 
and with joint 2 more elongate, at least half the length of 3, the latter shorter than 4. 
The three species from Central America referred to Vasaces have somewhat the 
facies of a female of the genus Dryops, from which they differ in the more transverse 
eyes, more quadrate thorax, longer tibial spurs, much longer second joint of the 
antennee, broader apical joint of the maxillary palpi, &c. 
Species of Xanthochroa have been recorded from the United States and from Colombia, 
as well as from Europe and Japan, and Lacordaire states (Gen. Col. v. p. 705) that 
numerous others from South America exist in collections; no species of Gidemeridee 
from Central America described in this work agrees sufficiently well with Xanthochroa 
to be included in it, and it is very possible that the South-American forms are not 
really congeneric. 
* Apical joint of the maxillary palpi elongate-triangular. 
1. Vasaces xneipennis. (Tab. VI. fige. 7, ¢; 7a, labium; 70, maxilla and 
maxillary palpus; 7 c, cedeagus.) 
Very elongate, finely pubescent, slightly shining, testaceous or reddish-testaceous, the head in the middle, the 
eyes, the tips of the mandibles, and the disc and sides of the prothorax more or less piceous, the scutellum 
flavous, the elytra of a brassy tint or brassy with a faint cupreous tinge. Head very closely and finely 
punctured, the eyes feebly emarginate ; antenne testaceous, joint 1 stout, 1 and 3 about equal in length, 
2 rather more than half the length of 3, 3 much shorter than 4 (11 missing); prothorax about as long as 
or rather longer than broad, moderately constricted behind (less distinctly so in one specimen), the base and 
apex with prominent margin and very feebly emarginate in the middle, the disc deeply transversely 
depressed in front and behind, with a rather deep sinuous groove on each side, and more or less canali- 
culate, or with a slightly raised median ridge, in the centre, the surface very finely and densely punctured, 
/more sparsely so on the disc; elytra very elongate, densely and finely punctured, the punctures more or 
‘less confluent, each with four distinct raised lines or cost extending from the base nearly to the apex, 
the suture also a little raised, the apices separately rounded; beneath densely and minutely punctured, 
finely pubescent, testaceous, the metasternum and venter (and in one example the prothorax) stained with 
piceous or obscure zneous; legs entirely testaceous; fifth ventral segment emarginate in the middle in 
both sexes. 
dé. Fifth ventral segment deeply triangularly emarginate; the sixth with a very long spatulate lobe on each 
side, and the dorsal portion of the same segment furnished with a very slender and much shorter spatulate 
appendage. 
Length 16 millim. (¢ 92.) 
Hab. Mexico, Totosinapan (Sal/é). 
