CANTHYDRUS.—HYDROCANTHUS. 7 
thorax being without infuscation, and the reddish-yellow vittee on the wing-cases broader. 
As Suphis lineatus, Horn, belongs to this genus, it has been necessary to change the 
name given by Wehncke. 
7. Canthydrus rufipes. 
Canthydrus rufipes, Sharp, Trans. Roy. Dubl. Soc. n.s. ii. p. 273. 
Hab. GuateMaua, Duefias and Paso Antonio (Champion); Nicaragua, Chontales 
(Janson); Panama, David (Champion).—Sovutu America, Amazon valley; Cua. 
HYDROCANTHUS. 
Hydrocanthus, Say, Tr. Am. Phil. Soc. ii. p. 105 (1825) ; Sharp, Trans. Roy. Dubl. Soc. n.s. 11. p. 839. 
The species known of this genus are about twelve in number, and are found in the 
warmer parts of the eastern and western hemispheres. The genus is one most difficult to 
deal with, on account of the extreme resemblance of the species to one another, and the 
absence of well-marked or readily appreciated external characters. Material for dealing 
in a thoroughly satisfactory manner with the Central-American forms is not at present 
to be obtained; and I have thus been able to determine only with doubt three of the 
species here mentioned. There is in the collection a specimen of H. indicus, labelled 
‘“‘Guatem.;” but I think this individual cannot really be from Central America, and 
have therefore not admitted it into the list of species here given. 
1. Hydrocanthus levigatus. 
Noterus levigatus, Brullé, Voy. d’Orb. Col. p. 50. 
Hydrocanthus levigatus, Aubé, Sp. Gén. vi. p. 406; Sharp, Trans. Roy. Dubl. Soc. n.s. 11. p. 280. 
Hab. Panama, David (Champion).—Soutn America, Bahia, Orinoco. 
The individuals from Panama are probably really conspecific with the South-American 
specimens. | 
2. Hydrocanthus texanus. 
Hydrocanthus texanus, Sharp, Trans. Roy. Dubl. Soc. n.s. ii. p. 280. 
Hab. Nort America, Texas.—Mexico, Oaxaca (Hége), Guanajuato (Duges, coll. Sallé). 
It is doubtful whether the Mexican individuals from these two localities are con- 
specific with the North-American specimens, or even with one another; in the absence 
of material that would allow the sexes to be certainly recognized, this must remain 
undecided. 
3. Hydrocanthus atripennis. 
Hydrocanthus atripennis, Say, Trans. Am. Phil. Soe. iv. p. 447° ; Sharp, Trans. Roy. Dubl. Soc. n. s. 
ii. p. 280. 
Hab. Mexico }.—Brazit, Santa Rita, and Boa Sorta. 
