8 ADEPHAGA. 
I have not been able with certainty to identify Say’s species; and it must remain at 
present doubtful whether I am correct in assigning to it the specimens from Brazil I 
have been able to examine. 
4. Hydrocanthus debilis. 
Hydrocanthus debilis, Sharp, Trans. Roy. Dubl. Soc. n.s. i. p. 281. 
Hab. Mexico, Oaxaca (Hége); GuatemMaLa, Paso Antonio, 400 feet (Champion) ; 
Panama, David (Champion).—Sovts America, Bahia. 
The individuals from Central America appear to be really conspecific with specimens 
from Bahia in my collection. 
5. Hydrocanthus marmoratus. 
Ovalis, sat convexus, pernitidus, testaceus, elytris castaneis, transversim testaceo undulatis. 
Long. 2 lin. 
Hab. Guatema.a, Paso Antonio, 400 feet (Champion). 
In the male the prosternal process is a little hollowed, and is nearly impunctate, 
there being only obsolete traces of punctuation on each side; the middle of the 
prosternum in front of the coxe is closely and finely punctate; the last ventral plate 
has at the apex in the middle a small oblong dull space. In the female the prosternal 
process and the space in front of it are quite impunctate and polished, and the ventral 
plate is without the dull patch. 
The species is extremely similar to H. debilis, but is considerably larger, and the 
distinctions between the sexes are quite different. 
MACROVATELLUS. 
Macrovatellus, Sharp, Trans. Roy. Dubl. Soc. n.s. ii. p. 840 (1882). 
The species of this genus are seven in number, and are, so far as we yet know, 
restricted to the eastern portions of South and Central America, extending from 
Uruguay to Mexico. 
1. Macrovatellus mexicanus. 
Macrovatellus mexicanus, Sharp, Trans. Roy. Dubl. Soc. n.s. ii. p. 284. 
Hab. Mexico, Puebla (Sai/é). 
The female of this species differs from the male by the very slender front and middle 
tarsi, and the absence of the pubescence on the middle femora; in other respects it is 
similar. The third joint of the front tarsus in this sex is elongate and slender—when 
seen beneath, about three times as long as broad. 
