MONACHUS. 97 
black ; the thorax has no trace of punctuation, even when seen under a very strong 
lens, and the middle portion of the disc is occupied by a larger or smaller black patch 
which sometimes extends nearly to the lateral margins, and there is no row of deep punc- 
tures to be seen at the posterior margin (this being very distinct in several closely-allied 
species); the elytra are generally black, sometimes bluish, with prominent shoulders, 
and they are strongly and regularly punctate-striate, the punctures, although becoming 
gradually finer posteriorly, being distinct to the apex, the ninth row consisting of larger 
punctures, and the following space distinctly raised; the underside and legs are 
black, but the anterior femora (as wellas the base of the two other pairs) are frequently, 
and the tarsi entirely, fulvous. 
If this description is compared with those given by Suffrian of several closely allied 
forms, it will be seen that I. teapensis differs either in coloration or sculpture from 
any of them. J. orbicularis, from Caracas, has a finely punctured thorax, and WM. 
obscurellus and M. scrobiculatus have yellow legs. In M. nigritulus (the thorax of 
which is not marked with flavous at the sides), as well as in J. umbrosus, the punctua- 
tion becomes obsolete towards the apex of the elytra. _ 
About 100 examples of /. teapensis have been received, all from the Mexican State 
of Tabasco. 
20. Monachus elegans. 
Black, the head, abdomen, and pygidium flavous; elytra with a broad triangular basal band, narrowed at the 
suture, red. . 
Var. Thorax with tke anterior and lateral margins narrowly fulvous; elytra red, with a transverse black band 
below the middle. 
Length 14-18 lines. 
Hab. Panama, Volcan de Chiriqui, Caldera, David (Champion). 
Closely allied to WM. bimaculatus, but differing in the following particulars :—The 
head (in most specimens) is entirely flavous, and the eyes in the male insect meet at 
the top of the vertex ; the elytra are similarly punctured, but their anterior half is 
occupied by a red transverse band which greatly narrows towards the suture, though 
extending to it. The fulvous portion of the abdomen seems to vary in extent; the 
pygidium, however, is always of that colour. In the variety the anterior and lateral 
margins of the thorax are also narrowly fulvous, and the red colour of the elytra pre- 
dominates, it being interrupted behind the middle by an irregular transverse black 
band which extends narrowly upwards along the suture to the base. M. elegans also 
differs from WV. bimaculatus in its larger size, and in the more transversely shaped 
and less conical thorax. All the specimens agree in having the large red basal band 
of the elytra extending quite to the suture. 
BIOL. CENTR.-AMER., Coleopt., Vol. VI. Pt. 1, Suppl., April 1889. 0 
