STYNGETUS. | 361 
STYNGETUS. 
Palpi omnes elongati, tenues; ligula integra; mandibule elongate, pone medium dentate. Tarsi anteriores 
in utroque sexu simplices. Abdomen segmentis tribus basalibus linea curvata profunda impressis. 
This genus will comprise certain species placed by Erichson in the genus Philonthus, 
viz. P. egregius, P. fervidus, and P. viduus, and referred by Kraatz (who, however, was 
imperfectly acquainted with them) to Philothalpus. They differ from this latter genus 
by the front tarsi being simple in each sex and destitute of fine pubescence beneath, and 
by the elongate trophi. They have a different appearance from the species of Philo- 
thalpus, so that Erichson, as stated above, referred the species known to him to the 
genus Philonthus, while the Philothalpi were placed by him as a section of Staphylinus. 
All the species of Styngetus known to me possess in their males a very peculiar 
character, viz. that the upper hinder margin of their posterior femora is crenulate. 
So far as I at present know, the genus is peculiar to Central America and the parts 
of South America north of the Amazons basin. Philonthus cupripennis and P. anten- 
natus, Guérin-Mén., belong to it. 
1. Styngetus deyrollei. 
Philothalpus deyrollei, Solsky, Hor. Soc. Ent. Ross. iv. p. 105"; id. v. p. 141°. 
Hab. Mexico 12, Cordova, Toxpam, Yolos (Sallé), Jalapa (Flohr), Mirador (Hége). 
2. Styngetus viduus, var. (Tab. IX. fig. 4.) 
Philonthus viduus, Er. Gen. et Spec. Staph. p. 506’. 
Hab. Sovutn America, Colombia 1. 
Var. Abdominis segmento ultimo toto albido. 
Hab. Panama, Volcan de Chiriqui, 4000 to 6000 feet (Champion). 
The individuals obtained by Mr. Champion differ only very slightly from Colombian 
examples, except as regards the very definitely pallid colour of the terminal segment ; 
and I have therefore treated them as being merely a variety, though the colour is quite 
similar in the six specimens obtained, one of which is figured. 
8. Styngetus flavicaudus. 
Niger; thorace subviolaceo, elytris violaceo-aureis, abdominis segmento ultimo flavo; abdomine parce 
punctato. 
Long. 15 millim. 
Hab. Guatemata, Balheu in Vera Paz (Champion). 
This insect is very closely allied to P. deyrolle: ; but the thorax has a violaceous tint, 
the hind body is more sparingly punctate, and the penultimate segment is entirely 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, Aprid 1884. 3AA 
