SCHIZOCHILUS.—STAPHYLINUS. 371 
Hab. Norra America?4, from Alaska southwards.—Mexico%, Ciudad in Durango 
(Forrer), near the city (Flohr, Hége), Cordova, Juquila, Guanajuato (Sallé), Chihuahua 
(Hepburn), San Luis Potosi and Monclova (Dr. Palmer); Guaremata, Duefias (Salvin). 
—Cvsa?, 
SCHIZOCHILUS. 
Schizochilus, Gray, An. King. xiv. p. 210. 
Staphylinus, Fam. V., Er. Gen. et Spec. p. 358. 
. Diococephalus, Nordm. Staph. pl. 1. fig. 8, not in text. 
Leistotrophus, Perty, Del Anim. p. 80. 
Leistotrophus, pars, Munich Cat. vol. ii. 
This genus has been united with Lestotrophus by modern authors, but quite erro- 
neously ; the very peculiar structure of the front tarsi, unique in the family, is of itself 
sufficient for its distinction; and to this must be added other characters of importance, 
' such as the absence of a stigmatic membrane, the differently formed anterior tibiz, the 
very widely separated middle coxe, with the mesosternum scarcely produced between 
them in a very gentle curve. Only one species is known. The name Leistotrophus was 
proposed by Perty for our insect; but as it has since become applied to a number of 
well-known species, I think it would be better to continue to apply the name as is 
generally done, it being, in my opinion, hopeless to adopt any absolute system of priority 
for the names of genera, owing to the constant fluctuations that genera undergo. 
1. Schizochilus versicolor. 
Staphylinus versicolor, Grav. Mon. p. 119’; Er. Gen. et Spec. p. 359’. 
Schizochilus brasiliensis, Gray, An. King. xiv. p. 304, pl. 32. fig. 3°. 
Leistotrophus versicolor, Munich Cat. ii. p. 576%. 
Staphylinus infuscatus, Nordm. Staph. p. 29’. 
Hab. Mexico, Toxpam, Cordova (Sallé), Misantla (Hoge), Jalapa®; GuatEMA.a, Cal- 
deras, San Gerdénimo, Cubilguitz, Zapote, La Tinta (Champion) ; Nicaragua, Chontales 
(Belt, Janson) ; Costa Rica, Cache, Irazu, 6000 to 7000 feet (Rogers); Panama, Bugaba, 
David, Volcan de Chiriqui, San Lorenzo, Tolé (Champion).—Soutn AMEricA to Rio de 
Janeiro. 
STAPHYLINUS. 
Staphylinus, Linné, Syst. Nat. ii. p. 683. 
Platydracus, Thoms. Sk. Col. i. p. 28. 
This genus, as I accept it here, is equivalent to Platydracus, Thoms., no forms related 
to the two European species for which Thomson reserved the name Staphylinus occur- . 
ring in our fauna. In this restricted sense Staphylinus will still comprise about one 
hundred described species, and is distributed over the continental regions of the 
3 BB2 
