CHLAMYS. 159 
tubercle is placed; in the Guatemalan specimens this ridge is scarcely perceptible and 
of a more tuberculate shape, three tubercles being visible when the thorax is looked at 
in a certain way. One of the Guatemalan specimens has the elytra of an obscure 
purplish colour; in the other they are slightly eneous and the tubercles partly fulvous. 
C. fulvomaculata is allied to C. frontalis, but is more narrowed posteriorly and also 
differs in the form of the thorax; the latter in C. fulvomaculata is sparingly punctured 
and has no reticulations, while in C. frontalis it is very closely punctured and finely 
rugose, and has two short oblique ridges behind only. 
11 (8). Chlamys collaris. (Tab. XXXIX. fig. 20.) 
Subcylindrical, black, opaque ; the head, antennz, a small spot near the anterior margin of the thorax, and the 
four anterior legs fulvous; thorax finely punctured and reticulate, with a rounded elevation; elytra with 
longitudinal and transverse ridges, the interstices foveolate and reticulate. 
Var. The thorax with the anterior portion and some small spots flavous. 
Length 14 line. 
Head closely and finely punctured, fulvous, a2 small elongate spot at the middle of the vertex, and two smaller 
spots above the base of the antenne black; antennz fulvous, the last four joints fuscous, the fourth and 
following joints transverse ; thorax with a strongly raised but evenly rounded central elevation, the middle 
of which is distinctly but not deeply channelled, the sides of this channel bounded by a ridge, the surface 
closely and finely punctured at the sides, the elevation itself reticulate, the anterior angles, and a small 
more or less distinct spot placed at the middle near the anterior margin, fulvous; scutellum impunctate ; 
elytra parallel, subcylindrical, black, without isolated tubercles but with the following longitudinal ridges 
—one running obliquely from the middle of the base to the apex and gradually approaching the suture, 
another commencing between the shoulder and the first ridge, and a third close to the lateral margin 
behind,—these ridges connected by transverse or oblique shorter ones (an oblique ridge near the base 
between the first longitudinal one and the suture, a more strongly raised and transverse ridge immediately 
below the middle, often connected along the suture with the first oblique ridge, and two other transverse 
ridges at the sides, one at, the other below, the middle), all the spaces between the ridges closely punc- 
tured but not reticulate, the suture dentate throughout; pygidium closely punctate, and with a long 
central, and two shorter lateral, ridges ; the underside foveolate-punctate; the four anterior legs fulvous, 
the posterior femora and tibie partly black, but varying in this respect. 
Hab. Mexico, Acapulco in Guerrero (Hoge). 
C. collaris, although not differing to any great extent in its general system of sculp- 
turing from many of its Brazilian congeners, may be known by the thorax being spotted 
(the anterior spot being present in all the specimens), closely punctured, and without 
tubercles; the elytra without isolated tubercles, but with longitudinal, oblique, and 
transverse ridges (which are seen to better advantage if the insect is viewed from in 
front). 
11 (c). Chlamys hogei. (Tab. XXXIX. fig. 18.) 
Black, shining, the antenne (the apical joints excepted), labrum, palpi, and tarsi flavous; head and thorax 
closely punctured, the latter with an evenly rounded, scarcely channelled, elevation ; elytra with two 
distinct subsutural costs, these connected with a short transverse ridge at the middle and with another at 
the sides, the interstices very uneven and remotely punctured. 
Var, The head and the anterior margin of the thorax flavous. 
Length 13 line. 
