4 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
7 species are known from America, 2 of which are described below. 
Besides the species mentioned in the key, the following have been 
described from South America: estebana Kerremans, from Venezuela; 
chevrolati Kerremans, from Guadeloupe Island; boliviana Kerremans, 
from Bolivia; and amazonica Kerremans, from the Amazon region 
of Brazil. 
KEY TO THE SPECIES. 
1. Above bicolored; head and pronotum piceus; elytra cyaneous. 
cyanipennis Fisher. 
Above unicolored......-- ee PN 
2. Above green, with a iegamenast eee gi er vad roca aeerceala® 
concinna Fisher. 
Above aeneous; front of head not broadly depressed.... segregatus Waterhouse. 
TRACHYS SEGREGATUS Waterhouse. 
Trachys segregatus WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 1889, 
pelo 
This bronzy species was described by Waterhouse from Guatemala, 
and was the first species of this genus to be described from the West- 
ern Hemisphere. It is said to be allied to the European Trachys tro- 
glodytes Schoenherr, from which it differs in being smaller and rela- 
tively narrower, elytra longer and more gradually narrowed to apex; 
head narrower without median groove; pronotum not quite as short, 
sides more distinctly margined, posterior angles less diverging, and 
the punctures smaller and very close together; elytra with humeral 
callus more distinct and glabrous, punctures smaller and moderately 
close together; and beneath with a few large, shallow punctures 
occupying the greater part of the surface. This species is not repre- 
sented in the United States National Museum Collection, and is 
placed in the key from the characters given in the original description. 
TRACHYS CYANIPENNIS, new species. 
Elongate, rather strongly convex, broadly rounded in front, atten- 
uate posteriorly, and slightly narrower behind than in front, gla- 
brous and moderately shining; head, pronotum, and scutellum 
piceous, with a slight greenish reflection; elytra cyaneous, with a 
slight violaceous tinge; beneath piceous. 
Head nearly flat, broadly and obsoletely depression on the front, 
the depression becoming obsolete on the occiput, and with a deep 
oblong depression behind the antennal cavities; surface irregularly 
and rather densely punctate, the punctures rather coarse on the 
occiput, but becoming obsolete anteriorly ; intervals smooth ; epis- 
toma wide between the antennal cavities, the anterior margin deeply) 
arcuately emarginate; antennae rather short, with the first two 
joints bluish-black, and remainder of joints piceous. Pronotum 
slightly convex, nearly three times as wide as long, distinctly nar- 
