112 CORYLOPHIDZ. 
Differs from the allied forms in its minute sculpture and pale elytral vitte. 
In the collection of M. des Gozis there is a single example of this species, labelled 
* Sericoderus mexicanus, Chevr.;” but, as it is deeply imbedded in shellac, Jam not 
able to say whether it belongs to this genus or to Arthrolips. In colour it closely 
resembles A. subvittatus, but in shape appears more like a Sacium. 
6. Sacium atrum. 
Sacium atrum, Reitter, Mittheil. Minch. ent. Ver. 1877, p. 126°. 
Ovate, convex, shining, clothed with pale hair, black, with the anterior margin of the thorax yellow ; head small, 
flavescent; thorax small, black, with the anterior margin more or less flavescent, ovally rounded, reflexed 
and rather produced in front, moderately and rather closely punctured, the basal margin faintly sinuated 
and with the angles nearly rectangular; elytra black, broader and twice longer than the thorax, widest 
near the shoulders, attenuated posteriorly, moderately punctured, the epipleural folds yellow; pygidium 
piceous; legs moderate, bright yellow; antenne short, yellow, with the club piceous. Length 1-12 millim, 
Hab. Mexico}. 
This species in colour closely resembles the black variety of S. oberthiiri, from which 
it can only be distinguished by its narrower form, smaller size, and much finer and 
closer sculpture. 
I am indebted to Dr. Dohrn of Stettin for the loan of the type specimen; the above 
description is taken from this example. 
7. Sacium marginatum, sp. n. 
Ovale, modice convexum, nitidum, pilis flavescentibus vestitum, distincte punctatum, piceum, pronoti marginibus 
flavis ; pronoto lato, antice rotundato, ad basin latissimo, distincte et sat profunde punctato, interstitiis 
glabris, nitidis, margine anteriore flava, late reflexa, margine basali vix sinuata, leviter reflexa, angulis 
rectis ; elytris quam pronotum sat latioribus et duplo longioribus, prope humeros latissimis, magis profunde 
punctatis, apicibus valde rotundatis, dilutioribus ; pedibus robustis, flavis; antennis obscurioribus. Long. 
corp. lin. =1-1:12 millim. 
Head ferruginous ; antenne dusky yellow, with the club darker. Thorax moderate, much rounded in front, 
piceous, with the margin broadly reflexed, bright yellow, widest at the base, rather deeply and distinctly 
punctured, with the interstices smooth and shining; basal margin slightly reflexed and faintly sinuated, 
with the angles rectangular. Scutellum rather large, rounded, deeply punctured. lytra moderate, 
piceous, rather broader and twice longer than the thorax, widest near the shoulders, rather more deeply 
punctured than the thorax, slightly narrowed towards the apex, the apex pale and much rounded. Abdo- 
men ferruginous. Legs robust, bright yellow. Underparts distinctly punctured, piceous, with the edges 
of the ventral segments pale. 
Hab. GuaTEMALa, Capetillo and Duefas (Champion). 
Rare. Differs from the foregoing species in its smaller size, more rounded form, 
broadly reflexed margin of the thorax, robust legs, and deeper sculpture. 
8. Sacium collare, sp. n. 
Ovale, sat obtusum, modice convexum, nitidissimum, pilis flavescentibus dense vestitum, castaneum, pronoto 
flavescente; pronoto modico semiovali, ad basin latissimo, minute sed distincte punctato, interstitiis 
