COLASPIS.—ALETES. 225 
Head of a more brilliant metallic bluish colour than the thorax and elytra, finely and rather sparingly punc- 
tured, with a more or less distinct longitudinal groove down the middle ; labrum and palpi fulvous; antenne 
entirely fulvous; thorax about twice as broad as long, moderately convex, the sides distinctly toothed 
immediately below the middle, the punctuation rather deep and strong, the disc somewhat remotely, the 
sides a little more closely punctured ; elytra convex, the punctures arranged in somewhat regular rows 
near the suture, closely and irregularly placed at the sides in the male, more scattered in the female ; 
underside and legs violaceous, the tarsi obscure piceous. 
Hab. Muxico, Temax in North Yucatan (Gawmer). 
The difference in the elytral punctuation in the two specimens obtained, and which 
is apparently sexual, is considerable. The dull dark violaceous colour and the fulvous 
antenne principally separate C. yucatana from its allies. 
30. Colaspis femoralis. 
Colaspis femoralis, Lefévre, Mitth. Minch. ent. Ver. 1878, p. 1227. 
Hab. Panama, Bugaba (Champion).—CotomBia, Muzo }. 
Chiriqui examples do not show any important differences from those from Muzo, of 
which several have been kindly given to me by M. Lefévre; most of the specimens 
from both localities have the knees, as well as the tibie and tarsi, black, and the 
femora are not always entirely reddish-testaceous as stated by Lefévre. 
ALETES (p. 146). 
Aletes, Chapuis, Gen. Col. x. (1874) (nomen preocc.). 
Aletiaxius, Lefévre, Cat. Eumolp. in Mém. Soc. Roy. Liége, xi. p. 42 (1885). 
The name Alethaxius has been proposed by Lefévre for this genus, Aletes being 
preoccupied in Mollusca. 
4, Alethaxius tuberculifer. 
Alethaxius tuberculifer, Lefévre, Ann. Soc. Ent. Fr. 1889, p. 338°. 
Hab. Mexico}. 
Unknown to me. 
5. Alethaxius semiviridis. 
Blackish, above metallic green or somewhat cupreous, the antenne and legs fulvous; thorax extremely closely 
and finely punctured, the sides sinuate; elytra very closely punctured, the interstices finely rugose. 
Length 23-2? lines. 
Of elongate and parallel shape; the head very closely and rather finely punctured ; labrum fulvous; antennz 
(¢ ) two-thirds the length of the body, robust, fulvous, the basal joint thickened, rather short, the second 
extremely short, the third and fourth joints equal, the others slightly longer ; thorax twice as broad as 
long, the anterior and posterior margins nearly parallel, the sides rounded, obscurely bisinuate at the 
middle, the surface densely impressed with fine punctures (which are a little less closely placed at the 
middle), and with a short smooth median line near the base, the anterior angles slightly produced 
outwards; scutellum a little longer than broad, with a few punctures ; elytra more strongly but not less 
BIOL. CENTR.-AMER., Coleopt., Vol. VI. Pt. 1, Suppl., December 1890. 2g 
