348 NITIDULIDA. 
50. Camptodes diffinis, sp. n. 
Rotundato-ovalis, sat convexus, crebre subtiliter punctatus, nitidus, ferrugineus; pygidio opaco, obsoletissime 
punctato. 
Long. 5-54 millim. 
Mas elytris minus nitidis, apicibus parum rotundatis, angulo suturali obtuso, haud rotundato. 
Fem. elytris nitidis, apicibus ut in mare constructis (vix magis recte truncatis) sutura apice haud dehiscente. 
Hab. Panama, Volcan de Chiriqui (Champion). 
This species greatly resembles the large varieties of C. communis, from which it may 
be distinguished—independently of the structure of the labrum—by the head being 
rather more coarsely punctured, the eyes larger, and the elytra (viewed in profile) 
slightly longer, and with their apices a little less rounded. The more obtuse sutural 
angle of the elytra and its similarity in the two sexes distinguish the insect from 
C. chiriquensis and C. masculinus ; it also has the elytra rather less elongate than they 
are in the two allied species. Three male and two female examples have been received 
of C. diffinis; one of the former is a very small specimen with the elytra scarcely less 
shining than they are in the female. 
51. Camptodes masculinus, sp. n. 
Rotundato-ovalis, sat convexus, crebre subtiliter punctatus, nitidus, ferrugineus; pygidio crebre punctato. 
Long. 6 millim. 
Mas elytris subopacis, apice singulo rotundato. 
Fem. elytris nitidis, apicibus nullo modo sinuatis, abdomine segmento ultimo ventrali apice in medio subtuber- 
culatim producto. 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 
The female of this species will be readily identified by the peculiar small projection 
in the middle of the apex of the last ventral segment; it differs from the corresponding 
sex of C. chiriquensis not only by this, but also by there being no trace of any sinuation 
of the apices of the elytra, these parts are, however, slightly more prolonged than they 
are in the male. The male resembles the corresponding sex of C. chiriquensis so 
closely that the only sure way I see of distinguishing them is the more rounded form of 
the apex of each elytron in C. masculinus. Five examples—two males, three females. 
AMPHICROSSUS. 
Amphicrossus, Evichson, in Germar’s Zeitschr. iv. p. 346 (1843). 
This is a genus consisting of but few species—about ten have been described,— 
yet having a very wide distribution in both hemispheres. In the New World, North 
America and South America each possess, so far as is at present known, only one or two 
species. I now add two from our region. . 
The genus is one of the most distinct and isolated of all the genera of the family, and 
