EUPLECTUS.—TRIMIUM. 37 
This insect is allied to the European £. signatus, but has a larger and more quadrate 
head, and more elongate thorax. The unique exponent is probably a female. 
2. Kuplectus solitarius. 
Rufo-castaneus, antennis pedibusque testaceis; antennis tenuibus, clava fere uni-articulata, articulis nono 
decimoque parvis; capite minore, subquadrato, utrinque impresso, impressionibus tantum anterius ad 
clypei marginem ipsum conjunctis. 
Long. 13 millim. 
Hab. GuaTEMALA, Cerro Zunil (Champion). 
This species is readily distinguished by the structure of its antenne, these organs 
differing but little from those of the genus Trimium, except that the terminal joint is 
not so large. The clypeal margin is raised in front, and the lateral depressions are 
connected by a transverse depression immediately behind the raised margin. The 
thorax is small, much contracted behind; with a sinuous transverse depression in front 
of the base, and an obscure depression on the disc just in front of the middle. The 
elytra possess a sutural stria, but are not foveolate at the base. 
Unique. 
TRIMIUM. 
Trimium, Aubé, in Guérin’s Mag. Zool. 1833, Mon. Pselaph. p. 44, t. 88. f. 2. 
This genus comprises about twenty species of European and North-American insects, 
all of very minute stature. MReitter states that most, if not all, of the New World 
species should be referred to Zrimiopsis; but I find in our region one that should, I 
think, clearly be retained in 7rimium if the two genera are accepted as distinct. 
1. Trimium concolor. 
Castaneum, nitidum, angustulum; capite utrinque anterius profundissime depresso; prothorace posterius 
impresso ; elytris basi quadrifoveatis. 
Long. 1} millim. 
Hab. GuateMata, Totonicapam 8500 to 10,000 feet (Champion). 
Antenne slender, with the intermediate joints very minute, the penultimate joints 
extremely short and very strongly transverse ; the terminal joint very large, elongate and 
stout, acuminate. Head subquadrate, as broad as or slightly broader than the thorax, 
the eyes anteriorly placed, with a very deep depression on each side extending far 
forwards. Thorax small, strongly narrowed behind; with a very deep transverse 
depression extending across the basal portion. TElytra rounded at the shoulders; with 
a deep elongate fovea just inside the shoulder, and a second rather smaller fovea at the 
base just outside the sutural stria. Basal segment of the hind body considerably longer 
than the following segment. The male is a little broader than the female, and has the 
penultimate ventral ring extremely abbreviate, the terminal ring with a deep definite 
impression. 
