PEDERUS. 613 
§ 2. Elytra well developed, with well-marked shoulders ; hind body more 
parallel-sided. 
12. Pederus signaticornis. (Tab. XVI. fig. 4.) 
Subparallelus, niger ; antennis, palpis, mandibulis, prothorace pedibusque rufis, illis medio dilute fuscescentibus ; 
femoribus extrorsum, tibiis tarsisque nigris; elytris lete cyaneis, crebre equaliter punctatis, quam pro- 
* thorax tertia parte longioribus; scutello mesosternoque rufis. 
Long. 10 millim. 
Hab. Mexico, Playa Vicente (Hoge, Sallé), Jalapa (Hoge); British Honpuras, Rio 
Hondo, Rio Sarstoon (Blancaneaux); GuatEMALA, Zapote, La Tinta, San Juan, Cubil- 
guitz, El Reposo (Champion); Nicaragua, Chontales (Janson), Granada, Managua 
(Sallé). 
Antenne elongate, yellow, joints 4-7 more or less deeply infuscate. Head rather 
narrow, the vertex narrow; very sparingly punctate, shining black. Thorax bright red, 
a good deal longer than broad, a little narrowed behind, very sparingly and feebly 
punctate. Elytra elongate and parallel, of a beautiful blue colour, deeply, coarsely, 
and rather closely punctate. Hind body entirely black, shining. Legs long, yellow; 
front tibize fuscescent ; extremities of the hind femora, and the whole of the hind tibiz 
and tarsi, black or blackish. 
This elegant insect is apparently not abundant, though widely distributed in our 
region. The only variation it exhibits is in the intensity of the black colour of the 
legs and of the middle joints of the antenne. Chevrolat in his collection proposed 
the name I have adopted for it; Fauvel, in the same collection, considered it to be 
P. tricolor, Er., but this can scarcely be the case. Our figure represents a male from 
the Rio Hondo. 
13. Pederus letus. (Tab. XVI. fig. 5.) 
Pederus letus, Er. Gen. et Spec. Staph. p. 660°. 
Hab. Mexico! Cordova (Sallé, Hoge), Jalapa (Hoge), Teapa (Chevrolat); Brivis 
Honpuras, Rio Hondo (Blancaneaux); GuatEmMata, Chinautla 4100 feet (Salvin), Gua- 
temala city, San Gerdénimo, Zapote, Cerro Zunil, El Tumbador, E] Reposo, Lanquin, 
Tamahu, Sabo, Chiacam, Chacoj (Champion); Nicaracua, Chontales (Belt, Janson) ; 
Costa Rica (Van Patten); Panama, Bugaba, Volcan de Chiriqui (Champion). 
In Mexico this species varies but little, the form met with being that described by 
Erichson, with the intermediate and posterior legs largely infuscate. In the State of 
Panama Mr. Champion secured a large series, belonging to a different race, having the 
legs immaculate yellow, the elytra short and very coarsely punctured. From Guatemala 
we have received a fair series, and in this region the species is apparently much more 
variable. The legs are either yellow or infuscate to a variable extent, and the elytra 
in some examples are much longer. As these characters are variable, and as all the 
