CHLAMYS. é 161 
Chlamys celocephala (p. 80). 
To the Mexican locality given, add :—Jalapa (Hoge), Cordova (Sallé). 
The two specimens obtained at the above localities agree with Lacordaire’s description 
as regards the excavated head, the carinate epistome, and the sculpture of the pygidium, 
but differ from it in size and colour: the length, instead of two and a quarter, is barely 
two lines, and the colour (with the exception of that of the head, antenne, part of the 
thorax, and the legs) is nearly black. Similar differences are, however, frequently to 
_ be found in species of this genus. The present insect differs distinctly from the allied 
forms in the sculpture of the head; the upper surface is nearly black but with a slight 
bronze tint, the thorax having fulvous spots at the sides and also near the anterior 
margin. 
14 (4). Chlamys instabilis. (Tab. XL. fig. 2.) 
/Eneous or black, the labrum, antenne, and tarsi fulvous; thorax finely strigose, its elevation deeply divided, 
the sides with one or two tubercles; elytra with a sinuate strongly raised oblique ridge extending from 
the shoulder to the apex, the apical portion with five isolated tubercles, the interstices deeply punctured. 
Length 14-14 line. 
Head with some irregularly placed punctures, and with a groove in the middle; thorax finely strigose and 
remotely punctured, the elevation divided by a broad channel (the part on either side of it distinctly ridged 
posteriorly) and laterally furnished with a rounded tubercle preceded by a short ridge, the sides with a 
distinct tubercle, the surface finely strigose throughout; elytra minutely granulate, with a very strongly 
raised ridge, formed by three semicircular protuberances, extending from the shoulder to the suture, the 
posterior portion with five distinct isolated tubercles, of which the two placed nearest the suture are the 
' largest, the interspaces rather deeply punctured. 
Hab. Mexico, Tepetlapa in Guerrero, Cuernavaca in Morelos, Orizaba, Atoyac in 
Vera Cruz, Teapa in Tabasco (H. H. Smith); Guaremaa, Las Mercedes (Champion) ; 
PanaMA, Bugaba, David in Chiriqui (Champion). 
C. instabilis is perhaps best placed near C. assimilis, Lac.; it is also, no doubt, closely 
allied to several Brazilian species described by Lacordaire, but seems to differ from all 
these either in the sculpture of the thorax or in the fulvous tarsi. The general colour 
varies from bronze to black. If the insect is looked at from above, three distinct 
transversely-placed tubercles are to be seen at the apex of each elytron, the outermost 
one being the smallest; in most of the allied species there are only two tubercles visible 
and these protrude, apparently, beyond the apex. 
A specimen from Cuernavaca is figured. 
14 (s). Chlamys sublevicollis. (Tab. XL. fig. 3.) 
Subquadrate, parallel, black, the antennae, labrum, and tarsi fulvous; thorax with a rounded elevation, the 
latter channelled and bicarinate, the sides nearly smooth ; elytra with strongly raised longitudinal costz 
and two tubercles, the latter placed near the apex. 
Length 13 line. 
Hab. Mexico, Matamoros Izucar in Puebla (Hége). A single specimen. 
BIOL. CENTR.-AMER., Coleopt., Vol. VI. Pt. 1, Suppl., November 1889. y 
