52 
Psyche 
[June 
Trichognathus marginipennis Latreille 
Trichognat/ius marginipennis Latreille, 1829, Regne Anim., 2. ed., 4:375. 
Type: Brazil. 
Trichognathus cinctus Chaudoir, 1848, Bull. Soc. Nat. Mosc., 21(1) :68. Type: 
Colombia. NEW SYNONYMY. 
Trichognathus immarginipennis Steinheil, 1875, Col. Hefte, 13:96. Type: 
Muzo, Colombia. NEW SYNONYMY. 
Having seen abundant material showing all possible grades of vari- 
ation between typical specimens of the three described species, I con- 
sider these species as synonyms. Van Emden ( 1935, Rev. Ent., 5 1314) , 
pointed out that the great variation in these species, made it almost 
impossible to separate them, when larger series were studied. Liebke 
(1951, Beitr. Faun. Perus, 2:260) comes to almost the same conclu- 
sion, although he observes a geographic variation in the yellow elytral 
border. I cannot find geographic variation in this or any other charac- 
ter. In a series of specimens from Nova Teutonia, Santa Catarina, I 
found specimens which could be assigned to “cinctus” and to “mar- 
ginipennis” , together with intermediate specimens; in another series 
from Dept, del Cuzco, Peru, all three “species” were represented ; not 
only “cinctus” in Peru and “marginipennis” in Southern Brazil, as 
supposed by Liebke. 
There is a fourth species of Trichognathus listed in the catalogues: 
strangulatus Lacordaire, which must be eliminated from this genus, 
since it was designated as type species of another genus ( Ancistroglos- 
sus) by Chaudoir [1862, Bull. Soc. Nat. Mosc., 35 ( 4) :307]. 
