318 NITIDULIDZ. 
PSILOTUS. 
Psilotus, Fischer, Bull. Soc. Mosc. i. p. 48 (1829); Erichson, in Germar’s Zeitschr. iv. p. 281. 
This is one of the characteristic genera of Nitidulidee of Tropical America. Although 
only about six species are known, they appear to be abundant as well as remarkable 
insects. They are found beneath the sappy bark of fallen trees. 
1. Psilotus cornutus. 
Nitidula cornuta, Fabry. Syst. Eleuth. i. p. 349°. 
Psilotus hoffmanseggii, Fisch. Bull. Soc. Mose. i. p. 48, t. 1. figg. 9-11’. 
Psilotus cornutus, Er. in Germ. Zeitsch. iv. p. 283°. 
Hab. British Honpuras, R. Sarstoon (Blancaneaux) ; Nicaracua, Chontales (Janson) ; 
Panama, Volcan de Chiriqui 3000 feet (Champion).—Soutn America}, Cayenne ?, Para °. 
2. Psilotus atratus. (Tab. X. fig. 12, ¢.) 
Psilotus atratus, Reitter, Verh. Ver. Briinn, xiii. Abhandl. p. 105°. 
Hab. Mexico}, Cordova (Sallé); Nicaragua, Chontales (Janson); Panama, Volcan de 
Chiriqui 3000 feet (Champion). 
3. Psilotus mimetes. (Tab. X. fig. 13, 2.) 
Depressus, piceus, limbo dilutiore, antennarum basi pedibusque rufis; elytris seriatim fortiter punctatis, inter- 
stitiis seriatim griseo-setosis. 
Long. 42 millim. 
Hab. Panama, Bugaba (Champion). 
Upper surface sparingly clothed with a distinct griseous setosity. Thorax coarsely 
punctured, the surface a little uneven, with a very small impression in front of the 
scutellum ; this latter bears a few symmetrically arranged hairs. Elytra with series of 
large punctures, and with the interstices seriately setose. 
We have received only one example, a female, of this species; it is distinguished 
from the others of the genus by the well-marked setosity of the upper surface. The 
specimen was mounted on a card with an example of Perilopa punctigera, to which it 
bears a considerable superficial resemblance. The mandibles of this specimen are 
shorter than those of the same sex of P. atratus; and it is probable, therefore, that 
the male has also smaller mandibles than those of the species mentioned. 
PERILOPA. 
Perilopa, Erichson, in Germar’s Zeitschr. iv. p. 276 (1843). 
This genus was established for one species from South America, and a second from 
the Cape of Good Hope. I have not had an opportunity of examining the South- 
African insect, 
