PADERUS. 617 
no means sure that P. costaricensis will prove to be more than an extremely remarkable 
variation of P. yucateca. 
20. Pederus mexicanus. 
Pederus mexicanus, Er. Gen. et Spec. Staph. p. 657°. 
Hab. Muxico (Deppe'), Presidio (Forrer), Cuernavaca (Sallé, Chevrolat), Puebla, 
Juquila (Sallé), Cordova (Hége). 
Erichson’s type of this species must have been a variety with unusually large elytra. 
The small series before me varies in respect of the length and breadth of these parts; 
usually when the wing-cases are short and broad, the punctuation is remarkably coarse. 
The cedeagus is quite different in its structure from that of any other species I have yet 
examined, 
21. Pederus columbinus. (Tab. XVI. fig. 7.) 
Pederus columbinus, Lap. Etud. ent. p. 123°. 
Pederus equinoctialis, Er. Gen. et Spec. Staph. p. 657 *. 
Hab. Panama, Bugaba, Volcan de Chiriqui 2000 to 3000 feet, Caldera, Tolé, San 
Miguel in the Pearl Islands (Champion).—Sourn America, Colombia}?, Cayenne ? 
(Lacordaire). 
Erichson being in doubt whether Laporte de Castelnau’s description really applied to 
this species, redescribed it under a fresh name. As there is no character at all to be 
found in Castelnau’s insufficient description that is inapplicable to this insect, it will 
be well to adopt the prior name, as is done in the Munich Catalogue. 
This insect is apparently common in the State of Panama, and differs in slight 
particulars only from any examples I have seen from Colombia or Cayenne; it is, I 
consider, conspecific with specimens found in the latter locality by Lacordaire, and 
named P. eguinoctialis by Erichson himself; there is, however, a slight difference 
in the cedeagus. 
22. Pederus apicalis. (Tab. XVI. fig. 8.) 
Parvus, gracilis, testaceus, abdominis apice summo nigro. 
Long. 54 millim. 
Hab. Mextco, Cordova (Sallé); Guatemata (Sallé, Castelnau), Paso Antonio, Cham- 
perico (Champion); Nicaragua, Managua (Sallé, Chevrolat). 
Antenne entirely yellow. Head narrow, with slender vertex. Thorax slender, 
longer than broad, sparingly punctate, with a broad space along the middle smooth. 
Elytra distinctly longer than the thorax, coarsely and rather closely punctate. 
I have preserved for this distinct little insect the name given to it by Chevrolat, 
under which it is distributed in collections. Our figure represents an example 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, October 1886. AKK 
