206 ; STAPHYLINIDZA. 
plate of the female is armed with four long spines and an extremely short tooth on 
each side. 
Ten individuals have been found. The species is very closely allied to the Amazonian 
E. rotundatus, but that species has the hind angles of the thorax more prolonged 
backwards, and the antenne a little longer. 
21. Erchomus ventralis. 
Convexus, nitidus, piceus ; capite elytrisque nigricantibus, antennarum basi, pedibus palpisque testaceis ; antennis 
tenuioribus, apicem versus leviter incrassatis ; prothorace impunctato, basi utrinque leviter sinuato, angulis 
posterioribus haud retrorsum productis; elytris parce subtiliter punctatis, angulo externo late rotundato ; 
abdomine crebre punctato. 
Long. 54 millim. 
Hab. Guatemaua, El Tumbador 2500 feet (Champion). 
Very closely allied to EF. flavipalpis, but with the thorax less sinuate on each side, 
and.the hind angle less prolonged; the antenne are a little longer, and the spines of 
the last ventral plate of the female are longer; the lateral tooth especially is longer. 
The mesosternal carina is very large, but is rounded at its upper anterior termination. 
Only two individuals have been found. 
22. Erchomus gravidus. (Tab. VII. fig. 8.) 
Convexus, nitidus, niger; antennis piceis, basi dilutiore, pedibus piceo-rufis; prothorace impunctato, basi 
utrinque leviter sinuato, angulis posterioribus haud retrorsum productis; elytris parce subtilissime 
punctatis, angulo externo late rotundato; abdomine dense punctato. 
Long. 6 millim. 
Hab. Mexico, Las Vigas (Flohr), Cordova (Sallé); Panama, Volcan de Chiriqui 3000 
to 4000 feet (Champion). 
Very closely allied to EF. flavipalpis, but larger and darker in colour, and with the 
elytra more finely punctate, the base of the thorax less sinuate on each side. The 
mesosternal carina is very large. It is still more similar to the Brazilian L. converus, 
Er., but that species has the hind angles of the thorax more produced. 
The figure is drawn from one of the Panama exponents. 
23. Erchomus impressus. 
Convexus, nigro-piceus, nitidissimus ; antennis, palpis pedibusque rufis, abdomine piceo ; prothorace amplo, basi 
utrinque leviter sinuato, angulis posterioribus vix retrorsum productis ; elytris parcissime obsolete punc- 
tatis, intra latera impressis, angulo externo late rotundato ; abdomine parce punctato. 
Long. 43 millim. 
Hab. Panama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 
Antenne slender, a little thicker externally, reddish; the three or four terminal 
joints a little infuscate ; tenth joint quite as long as broad. ‘Thorax extremely shining, 
without any punctuation or transverse strigosity. Elytra very shining, their surface a 
