112 HETEROMERA. 
Two examples, both males. In the smallest specimen the antenne extend fully to 
the end of the body, but in the other and much larger one they are considerably 
shorter. C. mixtus is closely allied to C. aspersus, Lec.; but differs from a Texan 
specimen of that species before me in the more widely separated eyes and more slender 
antennee in the male, the second joint of the latter being much longer (nearly twice as 
long as in C. aspersus), the head and thorax not so closely punctured, and the elytra 
with more numerous raised spots. The eyes are about as widely separated as in the 
female of the European C. serraticornis. 
2. Calopus obsoletus. 
Closely allied to C. mixtus ; the prothorax more coarsely, the elytra less closely, punctured, the latter com- 
paratively much less elongate and without smooth raised spots; the antenne ( ¢ ) extending to about two- 
thirds of the length of the elytra and subserrate; the rest as in C. mixtus. 
Length 11-113 millim. (¢.) 
Hab. Guatemaa, Volcan de Atitlan 3000 feet (Champion). 
Two male examples. C. obsoletus may prove to be only a local form of C. mirtus, 
but it seems inadvisable to treat it as such, the two male specimens of each agreeing 
well inter se. C. angustus, Lec., is an allied species, but differs in many important 
particulars. 
3. Calopus rugicollis. 
Moderately elongate, comparatively convex, castaneous, slightly shining, sparsely pubescent. Head very coarsely 
and closely punctured, the epistoma still more coarsely so, the eyes black and rather distant ; antenne ( 9 ) 
slender, reaching to the middle of the elytra, the outer joints moderately serrate ; prothorax convex, not 
quite so long as broad, the sides rounded anteriorly and nearly straight behind, the disc with a short 
shallow oblique impression on each side at the base only, the surface densely punctured, the punctures 
very coarse but quite shallow and here and there confluent; elytra closely and coarsely punctured (the 
punctures much finer and deeper than those on the prothorax), without traces of raised lines or spots, the 
suture depressed below the scutellum and also for some distance before the apex ; beneath coarsely and 
closely punctured. 
Length 10 millim. (@.) 
Hab. Guatemaa, El Jicaro in Vera Paz (Champion). 
One example. This species is less elongate and more convex than the two preceding, 
from both of which it differs in the very shallow, crowded, and coarser punctuation of 
the thorax; the elytral punctuation is finer and rather more scattered than in 
C. obsoletus. 
4, Calopus depressus. (Tab. V. fig. 20, ¢.) 
Very elongate, narrow, depressed, subparallel, testaceous, slightly shining, thickly pubescent. Head coarsely 
and somewhat closely punctured, the eyes (3) black and rather distant ; antenne (¢ ) long and slender, 
reaching to two-thirds of the length of the elytra, the outer joints subserrate ; prothorax about as long as 
broad, widest a little before the apex and thence to the base very gradually narrowing, the hind angles 
rectangular, the disc a little flattened behind and with a shallow arcuate impression just before the base, 
the surface closely and rather coarsely punctured ; elytra depressed, very closely, shallowly, and moderately 
