ERCHOMUS. 303 
backwards, and are obtuse and slightly rounded ; the surface has a fine quite distinct 
punctuation, and the colour becomes near the hind angles picescent. The rather broad 
hind body has very distinct lateral margins, and the punctuation at the extreme base of 
the basal segment is rather coarse. 
Only a few individuals have been found, and the figure has been drawn from a 
specimen found at Bugaba. The species was extant in Guérin-Ménéville’s collection 
under the name of Tachinus depressus, Er.; but I cannot consider it to accord sufficiently 
with Erichson’s description, and suppose the French savant was mistaken in his 
determination. 
13. Erchomus apicicornis. 
Subdepressus, nitidus, niger; thorace elytrisque piceo-fuscis, antennarum basi et articulis duobus ultimis, palpis 
pedibusque testaceis ; prothorace impunctato, nitido, basi fere truncato, lateribus ad angulos posteriores 
fortiter rotundatis; elytris «qualibus, parce obsolete punctatis; abdomine subnitido, parce obsoleteque 
punctato. 
Long. 34 millim. 
Hab. Mexico, Cordova (Sal/é). 
A peculiar and readily recognized species of rather flat form and only feebly punctate 
surface, with the terminal two joints of the antenne abruptly paler than the others ; 
the elytra without lateral depression or channel, with the perpendicular portion of the 
epipleure small and the mesosternal carina feeble, without angular elevation in front; 
the hind legs are rather slender and elongate, so that the species makes a decided 
approach to the genus Cilea. 
14. Erchomus ruficornis. 
Tachinus ruficornis, E. Dugés in coll. Sallé. 
Parum convexus, nitidus, niger; antennis rufo-obscuris, basi pedibusque testaceis ;,prothorace parce, omnium 
subtilissime punctato; elytris crebre subtiliter punctatis, lateribus haud curvatis ; abdomine minus nitido, 
subtiliter parum crebre punctato ; mesosterno alte carinato. 
Long. 34 millim. 
Hab. Mexico, Guanajuato (Duges, coll. Sallé). 
Antenne slightly thickened outwardly ; second and third joints equal; tenth about 
as long as broad. Thorax with the base almost straight, the hind angles not produced 
backwards, rounded. FElytra not impressed along the outer margin, which is straight 
and not curved, so that though the hind margin is a little oblique externally, the 
outer angle is only a little obtuse, not rounded. 
This species effects a transition to the following group, the epipleure being more 
vertical than in the other species of the group; it is readily distinguished from the 
species resembling it in size and form by the great elevation of the mesosternal carina. 
Four individuals are before me. 
