40 PSELAPHIDA. 
Hab. GuatEMALA, Coatepeque 1300 feet (Champion). 
Antenne short, the second joint not very large, joints 3-8 small, almost similar to 
one another, the ninth joint broader, transverse, the tenth a good deal broader, strongly 
transverse, the terminal joint large, acuminate. Head short and broad, with quite 
small eyes, the clypeal margin and the vertex elevated, the greater part of the surface 
depressed. Thorax very short, strongly narrowed behind, with a deep transverse sulcus 
extending across it near the base. Elytra without basal impressions or discoidal stria. 
Hind body almost unmargined. In the male the head is rather broader and the frontal 
depression more distinctly punctate than in the female; the hind tibie strongly dentate 
internally above the middle and much curved below the tooth. The hind body terminates 
in a small conical prominence which is minute in the male, but a good deal larger in 
the female. Two examples, one of each sex. 
2. Dalmodes rybaxides. 
Dalmodes rybawides, Reitt. Verh. Ver. Briinn, 1882, p.383*; Deutsche ent. Zeit. 1885, p. 337, t. 3. 
f, 292. 
Hab. Mexico (Bilimek } 2). 
The figure indicates an insect similar to the female of D. brevicollis, but apparently 
with differently shaped head and hind body. 
Group TRICHONYCINA. 
TRICHONYX. 
Trichonyx, Chaudoir, Bull. Mose. iii. p. 164 (1845). 
This is a genus of about twenty species, but it is doubtful whether it is correctly 
enumerated amongst those of our region. Indeed the only evidence I have of its 
existence in Tropical America is the fact that Schaufuss has ascribed four species to 
that province. 
1. Trichonyx (?) venustulus. 
Trichonyx venustulus, Schauf. Nungq. Otios. i. p. 288’. 
Hab. Mexico, Teapa ! (coll. Reiche). 
This is possibly an insect near Hurhexius, but I do not think it will prove to belong 
to any genus I am acquainted with. The elytra are said to be “ estriate.” 
RHEXIUS. 
Rhexius, Leconte, Bost. Journ. Nat. Hist. vi. p. 102 (1848). 
This very distinct genus is apparently peculiar to the warmer regions of the New 
World. The structure of the prothorax is most remarkable, its anterior part being 
