224 MALACODERMATA. 
In the ‘Check List of the Coleoptera of America north of Mexico,’ which was edited 
by Mr. Crotch, this species is quoted as synonymous with C. sallei, Mell. I have no 
examples from the United States, and therefore I cannot assert that it is so*. The two 
species standing in Sallé’s collection under the names cited above are identical. ‘This 
species may be known by its very small size (the largest examples are not above 
1 millimetre in length, and the smallest are considerably less), by its shining aspect, 
the thorax narrowing in front and with a few very small scattered punctures, and by 
the single bifid laminar horn on the head; the thorax is unarmed. ‘The figure is 
taken from a San-Juan male specimen. 
2. Ceracis tricornis. (Tab. X. fig. 27, ¢ .) 
Nigro-piceus, nitidus, thorace elytrorum latitudine, parce profunde punctato, elytris distincte punctatis. 
Long. #-1 millim. 
Mas. Capite cornuto, cornu bifido; prothorace antice bimucronato. 
Femina. Capite thoraceque muticis. 
Var.? capite cornu truncato, tenui, prothorace antice bituberculato. 
Hab. Mexico, Teapa, Cordova (Sallé coll.); Guatemana, San Juan in Vera Pay, 
Tamahu, Zapote (Champion). 
This species varies a good deal in the development of the thoracic projecting teeth, 
but will be distinguished from C. militaris by the deeper and sparser punctuation of 
the thorax, and by its not narrowing in front: these characters, in addition to the 
teeth on the thorax, induce me to consider it a separate species. ‘The thoracic teeth 
and often the horn of the head are yellow, the rest of the insect being pitchy with 
yellow antennz and legs, the club of the former darker. Of the supposed females of 
this insect nothing reliable can at present be said, as I do not see that they differ 
essentially from those of C. militaris, and both species occur in the same localities. 
The specimens from which the figures of both of these species in our Plate were taken 
were collected at San Juan, probably having been found at one time and place. 
* Reitter (loc. cit. p. 37) says C. sallei is not identical with C. militarts, and that the latter has nine joints 
to the antenne: and is an Ennearthron. According to my own observation the insects which we here regard as 
C. militaris and C. furcifer, being so labelled in Sallé’s collection, have eight joints. But even if there were 
nine it would not follow they were congeneric with Ennearthron. 
