764 SUPPLEMENT. 
HYDROCHARIS (p. 61). 
Hydrocharis perfectus (p. 61). 
To the locality given, add :—Mexico, Vera Cruz (Hoge). 
OOCYCLUS (p. 61). 
Oocyclus vestitus (p. 62). | 
To the locality given, add:—Panama, Volcan de Chiriqui 2000 to 4000 feet (Cham- 
pron). 
If the unique specimen from Chiriqui be not really conspecific with the, likewise 
unique, Mexican exponent of this interesting species, it is, at any rate, closely allied 
thereto ; it is, unfortunately, in a very decayed condition. 
Oocyclus maculatus (p. 63). 
To the locality given, add :—Panama, Volcan de Chiriqui 3000 feet (Champzon). 
This example is, like that from Guatemala, the only one found in the locality, and 
the peculiar green spots of the upper surface are indistinct, but I see no other difference. 
HYDROBIUS (p. 64). 
Hydrobius subcupreus (p. 64). 
To the localities given, add :—Mexico, Jalapa (Hoge) ; Panama, Volcan de Chiriqui 
4000 to 6000 feet (Champion). 
Hydrobius armatus (p. 64). 
To the localities given, add:—Mexico, Mazatlan (Hoge); Panama, near the city, and 
San Miguel in the Pearl Islands (Champion). 
Hydrobius debilis (p. 65). 
To the Panama locality given, add :—San Miguel in the Pearl Islands (Champion). 
PHILYDRUS (p. 66). 
Philydrus zequalis (p. 68). 
To the localities given, add :—Panama, Bugaba, Volcan de Chiriqui, Panama city, San 
Miguel in the Pearl Islands (Champion). 
HYDROCOMBUS (p. 70). 
Hydrocombus fraterculus (p. 71), 
To the Mexican locality given, add :—Northern Sonora (Morrison). 
These specimens were named Philhydrus imbellis, Lec., by Morrison, and that species 
is probably a close ally of H. fraterculus; examples from California in my collection 
that I consider to be Leconte’s species are, however, distinct from the Mexican insect. 
