TRYPANIDIUS.—ATRYPANIUS. 177 
Very closely allied to 7. dimidiatus of South Brazil, and scarcely more than a local 
variety of it. No allied form, however, is known from the intervening countries, 
2. Trypanidius rubripes. (Tab. XIII. fig. 10.) 
Trypanidius rubripes, Bates, Trans. Ent. Soc. 1872, p. 219. 
Hab. Nicaragua, Chontales (Belt). 
3. Trypanidius melancholicus. (Zrypanidius geminus, Tab. XIII. fig. 12.) 
Leiopus melancholicus, Serville, Ann. Soc. Ent. Fr. 1835, p. 87°. 
Trypanidius geminus, Pascoe, Trans. Ent. Soc. ser. 2, v. p. 29°; Bates, Trans. Ent. Soc. 1872, 
p. 238°. 
Hab. Guaremata, Panzos (Champion); Nicaracua, Chontales (Belt ?).—SovutTH 
America, Cayenne!, Ecuador, Brazil ?. 
Chontales specimens differ from the typical Cayenne form in the twin velvety spots 
of the elytra being confluent; in this they agree with examples taken by Buckley in 
Ecuador. 
T. melancholicus differs from the other species of the genus in the considerably shorter 
forehead and lower lobe of the eyes. 
CHAETANES. 
-Chetanes, Bates, Ann. & Mag. Nat. Hist. ser. 3, xiii. p. 45 (1864). 
The following is the only described species of this genus, which is very closely allied 
to Trypanidius, differing chiefly in its bristly surface and the presence of centro-basal 
tufts on the elytra, in which it resembles certain species of Lophopeum. 
1. Cheetanes setiger. (Tab. XII. fig. 8.) 
Chetanes setiger, Bates, Ann. & Mag. Nat. Hist. ser. 3, xiii, p. 45’; id. Trans. Ent. Soc. 1872, 
p. 2187. 
Hab. Nicaracva, Chontales? (Belt).—Souta America, Cayenne, Ecuador, Amazons. 
ATRYPANIUS. 
Atrypanius, Bates, Ann. & Mag. Nat. Hist. ser. 3, xiii. p. 47 (1864). 
This genus has been incorporated with Trypanidius by Harold and Gemminger in 
the Munich catalogue; but I think it has an equal title to generic distingtion to most 
other genera in this difficult group. Its differential characters, as I explained in founding 
the genus, lie chiefly in the plane mesosternum and the very short ovipositor. The 
elongated forehead and elongate-oblong lower lobes of the eyes and short basal joint 
of the hind tarsi it possesses in common with Trypanidius, and the broad mesosternum 
in common with Nyssodrys. The more convex species of Nyssodrys approach it very 
closely, the length and oblong shape of the lower lobe of the eyes being the chief point 
BIOL. CENT.-AMER., Coleopt., Vol. V., Aprid 1881. 2a 
