EHTMBTJS. 143 



prothoracis marginibus pedibusque dilutioribus rufo-piceis j elytris ferrugineis, plagia magna discoidali 

 nigra, distincte crebre punctatis. Long. 4 millim. 



Hab. Mexico x , Cordova, Toxpam (Salle), Jalapa, Esperanza (Hoge). 



This insect is labelled Bystus limbatus by Guerin in Salle's and other collections, but 

 is not described in the 'Archives Entomologiques.' The Stenotarsus limbatus of that 

 work appears to refer to some different insect which it is impossible now to identify. 



2. Rhymbus hemisphaericus. 



Rhymbus hemispharicus, Gerst. Monogr. Endom. p. 349, t. 3. f. 6 l ; Gorh. Endom. Recit. p. 27 *. 



Hab. Mexico (Truqui, coll. Fry), Toxpam (SalU), Acapulco in Guerrero [Hoge) ; 

 British Honduras, Belize (Blancaneaux) ; Guatemala, San Geronimo and Panzos in 

 Vera Paz (Champion) ; Costa Rica 1 2 ; Panama, Volcan de Chiriqui, Caldera (Champion). 



The specimens from Guatemala, which I refer rather doubtfully to this species, are 

 smaller than typical ones, and have the tip of the apical joint of their antenna? reddish, 

 but there are one two from Toxpam in Mexico which agree with them. The colour of 

 the apical joint may be only a sexual character, and can hardly be relied upon, and 

 some specimens have it pitchy-red. The punctuation is a better character, and in this 

 species it is close and fine, but distinct. Most of the examples from the Volcan de 

 Chiriqui are very dark, almost pitchy in colour, and some of them have the punctuation 

 deeper and more confluent ; probably this is a sexual character. 



3. Rhymbus apicalis. 



Rhymbus apicalis, Gerst. Monogr. Endom. p. 350 * ; Gorh. Endom. Recit. p. 27 2 . 

 Hab. Mexico 2 2 (Truqui, coll. Fry) ; Guatemala, Zapote (Champion). 



Two specimens obtained by Mr. Champion at Zapote have the apical joint of the 

 antennae clear red, but otherwise agree with the larger specimens of R. hemisphaericus 

 from Toxpam. 



I think it is very probable that R. apicalis, which was described by Gerstacker from 

 a female specimen, is only that sex of R. hemisphaericus. This point, and whether 

 there are more than one species with similarly coloured antenna?, can hardly be deter- 

 mined except by close observation in those localities where the species occurs. 



4. Rhymbus piceus. (Tab. VIII. fig. 13.) 



Kotundatus, fere hemisphaericus, saturate brunneus vel rufo-piceus, breviter sed dense aureo-pilosus ; elytris 

 perspicue et subconfluenter punctatis ; antennis, clava nigrescente, basi dilutioribus. Long. 3 millim. 



Hab. Panama, Volcan de Chiriqui, Caldera (Champion). 



Of the same size as the smaller specimens referred to B. hemisphaericus, but of a dark 

 pitchy-red colour, the legs and antenna? partaking of the same pitchy tint. The distin- 



