714 STAPHYLINID A. 
Hab. Mexico (Truqui, Flohr), Cordova, Vera Cruz (Sallé), Teapa (Pilate *, Sallé) ; 
British Honpuras, Belize, R. Hondo (Blancaneaux) ; Guatemata (Sallé*), Zapote, Chacoj 
(Champion) ; Nicaragua, Granada * (Sallé), Chontales (Janson) ; Panama, Bugaba, Volcan 
de Chiriqui (Champion).—AnTILLES, Guadeloupe ?—Soutu Amzrica’?? to Rio Janeiro. 
5. Piestus mexicanus. (Tab. XIX. fig. 5.) 
Piestus mexicanus, Lap. Etud. ent. p. 180*; Er. Gen. et Spec. Staph. p. 836°; Fauv. Bull. Soc. 
Linn. Normand. ix. p. 34, t. 4. f. 9°. 
Hab. Mexico 12 (Lesueur, Sallé*), Campeche? (coll. Sharp), Yucatan *, Teapa (Pilate?, 
coll. Sharp), Cordova (Sailé), Jalapa (Flohr, Hoge), Tehuacan (Hoge); GUATEMALA, near 
the city, Zapote, Balheu, Teleman (Champion) ; Panama, Bugaba, David (Champion).— 
ANTILLES, Santo Domingo (coll. Sharp).—Brazit, Santa Catarina °. 
This is either a very variable species, or there are more than one mixed under the 
name; from the material before me I must regard the former to be the case. The 
dozen examples from the State of Panama are only about half the size of the Mexican 
specimens, and have a very strongly transverse thorax. The greater number of examples 
—about two dozen—are from Mexico, and exhibit much variation in the punctuation 
of the thorax. The Guatemalan exponents do not agree either with those from Mexico 
or those from the State of Panama, and are remarkable from the deeper clypeal suture, 
and the greater convexity of the space it surrounds, as well as by the nearly complete 
absence of punctuation from the head. LErichson’s type of the species, and I believe 
the example is also a type of Laporte’s, is a large female, with the thorax much punc- 
tured; it came from Mexico. 
6. Piestus alternans. 
Depressus, dilute piceus; antennis pedibusque rufis; prothorace punctato, lateribus ultra medium obsolete 
unidenticulatis ; elytris sulcatis. 
Long. 43 millim. 
Hab. Panama, David in Chiriqui (Champion). 
Head obsoletely punctured, shining; clypeal suture deep. Thorax very strongly 
transverse; the sides rounded in front, constricted behind, and with a short obtuse 
tooth just before the constriction; the surface rather numerously punctured, and with 
a channel along the middle, and a very vague rugosely-punctate depression extending 
forwards from the front angle. Elytra short ; each with four grooves: the sutural one 
broad, and followed by a broad interstice, then another broad groove (consisting in fact 
of two grooves, the interstice between being subobsolete), and external to this two 
narrower grooves and coste. Hind body much punctured. Metasternum polished in 
the middle. 
This insect is very similar to the smaller form of P. mexicanus found in the State of 
Panama; it is distinguished by the second elytral interstice being quite, the fourth 
