various Central American Coleoptera. 73 
PYCNOCEPHALUS. 
Pycnocephalus, Sharp, Biol. Centr.-Am., Coleopt. ii, 1 
p. 373 (1891) [nec Kraatz, 18951]. 
> 
Pycnocephalus metallicus. 
Pycnocephalus metallicus, Sharp, loc. cit. pl. 12, figs. 6, 6a. 
This species was described from four examples, from as 
many different localities in Guatemala and Panama. Three 
have the head or the entire upper surface metallic green, 
and one is of a uniform dark bronze colour. A short series 
from Tampico, N.E. Mexico, sent me for determination by 
the U.S. National Museum, showing similar variation, seem 
to belong to P. metallicus: but they are smaller and have 
the elytra more distinctly punctured on the posterior half. 
It is probable that the green coloration is confined to the 
male sex, as one of the dark examples from Tampico is 
certainly a female. The legs, too, in the types vary in 
colour from nigro-piceous to testaceous. 
ADIMERIDAE. 
MonoeEpuvs. 
Monoedus, Horn, Trans. Am. Ent. Soc. x, p. 116 (1882). 
Adimerus, Sharp, Biol. Centr.-Am., Coleopt. ii, 1, p. 441 
(1894). 
The above synonymy has already been noted by Arrow 
[Ann. and Mag. Nat. Hist. (8) iv, p. 195 (1909)]. 
Monoedus guttatus. 
Monoedus guttatus, Horn, loc. cit. p. 116, pl. 4, fig. 10. 
Adimerus dubius, Sharp, loc. cit. p. 443. 
Additional localities for this species, which was first 
described from a single example from Cedar Keys, Florida, 
are :— 
Mexico, Tampico in Tamaulipas (Schwarz), Teapa 
(H. H. Smith); Cupa, Cayamas. 
We have recently received from the U.S. National 
Museum specimens of M. guttatus (det. Schwarz) from 
N.E. Mexico and Cuba, and I am unable to separate them 
from A. dubius, Sharp. The elytral markings of M. guttatus, 
* This genus of Colydiidae has been re-named Cephalopycnus by 
Arrow [Ann. and Mag. Nat. Hist. (8) iv, p. 193 (1909)]. 
