GYRINIDZ.—HYDROPHILID. 761 
4. Gyrinus plicifer. 
Gyrinus plicifer, Lec. Ann. Lyc. New York, v. p. 209'; Regimb. Ann. Soc. Ent. Fr. 1883, p. 153°. 
Hab. Nortn America }?,—Mexico, Northern Sonora (Morrison). 
Though very similar to G. parcus, this species is readily distinguished by the clear 
red epipleure, the more shining surface, and the absence of sexual sculpture in the 
female. 
GYRETES (p. 51). 
Gyretes leinotus (p. 51). 
The Guatemalan examples referred by me to G. letonotus belong to the following 
species :— 
1(a). Gyretes minor. 
Gyretes minor, Regimb. Ann. Soc. Ent. Fr. 1883, p. 407+. 
Gyretes leionotus, var. minor, huj. op.” 
Hab. Guatemata 1, Torola (Champion). 
Dr. Regimbart ! regards the extremely slight differences between this and G. leionotus 
as indicative of two distinct species. 
3. Gyretes guatemalensis. 
Gyretes levis, huj. op. p. 51. 
Gyretes guatemalensis, Regimb. Ann. Soc. Ent. Fr. 1883, p. 3997. 
Dr. Regimbart considers! our insect probably distinct from G. levis, Brullé, and has 
described it (. c.) from an example I sent to him. 
Gyretes acutangulus (p. 52). 
To the locality given, add:—Panama, Bugaba, Panama city, San Miguel in the 
Pearl Islands (Champion). 
Mr. Champion procured a fine series of this species; though decidedly smaller than 
the Mexican types, I can find no other difference. 
6. Gyretes mexicanus. 
Gyretes mexicanus, Regimb. Ann. Soc. Ent. Fr. 1883, p. 405°. 
Hab. Mexico}. 
HYDROPHILUS (p. 54). 
Hydrophilus ater (p. 54). 
To the localities given, add :—Panama, near the city (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, September 1887. 5 HE 
