ERCHOMUS. 305 
18. Erchomus vicinus. 
Sat convexus, nitidissimus, niger; antennis rufis, basi pedibusque testaceis, prothorace picescente, elytrorum 
abdominisque segmentorum marginibus minus argute piceis; thorace levigato, elytris parce subtilissime 
punctulatis; abdomine equaliter obsolete punctato, minus nitido. 
Long. 32 millim. 
Hab. Guatemaia, Guatemala city, Zapote, San Gerénimo (Champion). 
This insect is very similar to £. cinctiventris, but differs in the longer antenne and 
the different punctuation of the hind body. The antenne are slender, but little 
thickened externally, and no one of the joints is broader than long. The base of the 
thorax is distinctly sinuate on each side, so that the rounded hind angles appear a little 
produced backwards. The margins of the segments of the hind body are not very 
conspicuously piceous. 
19. Erchomus ignavus. (Tab. VII. fig. 7.) 
Coproporus ignavus, Sharp, Trans. Ent. Soc. Lond. 1876, p. 87°. 
Hab. Mexico (Truqui), Cordova (Sallé); GuaTEMALA, Guatemala city, San Gerénimo, 
Las Mercedes 3000 feet, El Tumbador, Balheu in Vera Paz, Capetillo, Zapote, Aceituno 
(Champion); Panama, Volcan de Chiriqui 3000 to 4000 feet, Bugaba 800 to 1500 feet 
(Champion).—Soutn America, Amazons valley !. 
This species varies a little in size and colour, and the terminal joint of the antenne 
is sometimes nearly black, sometimes nearly entirely pale. ‘The mesosternal carina is 
rather strongly elevated, but there is no trace of a tubercle on the middle of the front 
edge of the mesosternum. Tachinus elatus, Er. (Gen. et Spec. Staph. p. 248), is probably 
a similar species with longer and more slender antenne. 
The individual figured was found by Truqui in Mexico. 
20. Erchomus flavipalpis. 
Convexus, nitidus, piceus; capite elytrisque nigricantibus, antennarum basi, pedibus palpisque testaceis ; antennis 
tenuioribus, apicem versus leviter incrassatis, articulo ultimo apice pallido; prothorace impunctato, angulis 
posterioribus paululum retrorsum productis, rotundatis; elytris parce subtiliter punctatis, angulo externo 
late rotundato; abdomine crebre punctato. 
Long. 5 millim. 
Hab. Muxtco, Cordova (Sadlé); Guatema.a, Paraiso 300 feet (Champion); Panama, 
David (Champion). 
Each joint of the antenna is longer than broad. The large and ample thorax is 
without punctuation, and is excessively finely strigose. The punctuation of the wing- 
cases is quite distinct though fine; the lateral margin is curved near the hind angle, so 
that the hind angles appear very broadly rounded ; there is no lateral depression. The 
mesosternal carina is large; it terminates in front as a free angle, and just in front of 
this angle the anterior edge of the mesosternum is tuberculate. The terminal ventral 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, December 1883. 2 RR 
