SACIUM. 109 
The Central-American species may be separated by the following characters, viz. :— 
Elytra variegated. 
Elytra with a narrow transverse fascia near the middle. 
Thorax attenuated infront. . . . . 2. .« . . . . « oberthiiri. 
Thorax not attenuated infront . . . . » ee 6s tncertum. 
Elytra with a broad transverse fascia near the middle » . . « latifasciatum. 
Elytra with a large pale spot beyond the middle . . . . . . fenestratum. 
Elytra with a pale longitudinal vitta. . 2. 1... 1. 1...) mexicanum. 
Elytra not variegated. 
Elytra black . 1... we eee ee ee trum, 
Elytra piceous or castaneous. 
Thorax moderate. 
Thorax very broadly margined. . . . «© . «©. .) 0marginatum. 
Thorax narrowly margined . . . . . «© . . . .~ «Collare. 
Thorax large and broad. . . . . . ws.  .  ~ CLaticolle. 
1. Sacium oberthuri. (38. lecontei, Tab. IIT. figg. 15, 15 a, 3.) 
Arthrolips oberthiiri, Reitter, Verh. zool.-bot. Ges. Wien, xxvii. p. 193°. 
Sacium oberthiiri, Reitter, Mittheil. Miinch. ent. Ver. 1877, p. 126. 
Oblongo-ovale, modice convexum, sat nitidum, pilis aureis vestitum, vel piceum vel plus minusve rufescens, 
modice sed distincte punctatum, fascia recta transversa pone media elytra et plerumque humeris atque 
apicibus eorum rufis ornatum; pronoto plus minusve rufescente, sat parvo, antice angustato, ad basin 
latissimo, leviter marginato; elytris magnis, quam pronotum multo latioribus, et plus quam duplo 
longioribus, prope humeros latissimis, apicibus latis rotundatis; pedibus atque antennis rufis. Long. 
corp. “,* lin.=1-50-1°75 millim. 
Head small and narrow, rufous; eyes moderate; antenne moderate, with the club rather large, dusky. Thorax 
more or less rufous, rather small, attenuated in front, widest at the base, moderately and distinctly pune- 
tured, with the mterstices shining; margin slightly reflexed; basal margin strongly sinuated, with the 
angles acute. Scuteléwm rounded and punctured. lytra large, much wider, and twice longer than the 
thorax, widest near the shoulders; piceous, with a straight transverse fascia beyond the middle, and 
sometimes the shoulders and apex, red; apex broad and rounded. Legs rather long and slender, rufous. 
Underparts piceous, moderately and distinctly punctured. 
Hab. Mexico1, Toxpam (Sallé); Guatemata, El Tumbador, Quiche Mountains, 
Capetillo, Zapote, Guatemala city, Vera Paz (Champion). 
Differs from other species in its large size, longer and more or less rufous thorax, 
straight red fascia on the elytra, and in sculpture; the elytra are sometimes, but very 
rarely, unicolorous. From 8S. fasciatum, Lec., this species is separated by its larger 
size, broader form, much longer thorax, deeper sculpture, and shape of the transverse 
fascia on the elytra. An example from Zapote is figured. 
At the time our Plate was drawn I had overlooked the descriptions of the Mexican 
Sacia described by Reitter. I have little doubt that the species figured by me under the 
name of SS. /econte? is referable to S. oberthiiri ; the description is, however, too vague to 
be positively conclusive, ¢. g. reference to the sculpture is totally omitted, although so 
important. 
