SACIUM.—ARTHROLIPS. 113 
glabris, nitidis, fronte et lateribus leviter marginatis, et levissime reflexis, margine basali leviter bisinuata 
angulis fere rectis; elytris sat brevibus, quam pronotum haud latioribus fere sesqui-longioribus, prope 
humeros latissimis, minute sed distinctissime punctatis, interstitiis glabris, nitidis, lateribus leviter margi- 
natis, apicibus latis, valde rotundatis, dilutioribus ; pedibus atque antennis sat brevibus, ferrugineis. Long. 
corp. 5? lin,=1-1-12 millim. 
Body oval, rather obtuse, moderately convex, very shining, thickly clothed with flavescent hair, castaneous, 
with the thorax flavescent. Head piceous ; eyes moderate; antenne rather short, ferruginous. Thorax 
moderate, semioval, widest at the base, minutely but distinctly punctured, with the interstices smooth 
and shining ; front and sides slightly margined, and very slightly reflexed ; basal margin faintly bisinuated, 
with the angles almost rectangular. Scutellwm moderate, obtusely triangular. Elytra rather short, one 
half longer but not broader than the thorax, widest near the shoulders, minutely but very distinctly 
punctured, with the interstices smooth and shining; sides slightly margined; extremities broad and much 
rounded, paler. Legs rather short, ferruginous. Underparts castaneous. 
Hab. Mexico, Teapa, Toxpam (Sal/é). 
Differs from S. marginatum in the small size and very slightly reflexed margins of its 
thorax, and in sculpture. 
In M. Sallé’s collection this species bears the MS. name of S. collare, Deyr.; but I 
believe that it has not yet been described. 
9. Sacium laticolle, sp. n. 
Elongatum, modice convexum, haud nitidum, pilis flavis vestitum, sat profunde punctatum, rufo-testaceum ; 
pronoto magno, minute et remote punctato, interstitiis glabris, nitidis, margine anteriore sat late reflexa, 
linea impressa ad basin notato, margine basali leviter sinuata angulis rectis; elytris sat longis, sat angustis, 
quam pronotum parum angustioribus, sesqui-longioribus, ad humeros latissimis, postice attenuatis, quam 
pronotum magis confertim et magis profunde punctatis, lateribus rectis, apicibus obtuse rotundatis ; 
pedibus atque antennis flavis. Long. corp. 7%; lin.=0°75 millim. 
Head testaceous ; antenne moderate, yellow. Thoraw large, minutely and distantly punctured, with the inter- 
stices smooth and shining; anterior margin rather broadly reflexed, marked with an impressed line at the 
base ; basal margin faintly sinuated, with the angles rectangular. Scutellum small, rounded. Elytra rather 
long and narrow, half as long again but narrower than the thorax, widest at the shoulders, attenuated 
posteriorly, more closely and more deeply punctured than the thorax; sides straight; apex obtusely 
rounded. Abdomen slightly exposed, testaceous. Legs moderate, yellow. Underparts rufo-ferruginous, 
rather deeply punctured. 
Hab. GtateMaLA, El Reposo (Champion). A single example. 
Differs from other species of the genus in its small size, large thorax, and narrow 
linear elytra. 
ARTHROLIPS. 
Arthrolips, Wollaston, Ins. Mader. p. 475 (1854). 
Body generally oval, pubescent, the underside convex. Head wholly concealed. Thorax with the front margin 
entire, the hinder angles not produced. lytra rather long, generally broad, much rounded at the extre- 
mities. Antenne generally short, 10-jointed, the club much incrassate. Palpr: mawillary 4-jointed— 
2 very large, 4 long, robust, obtusely conical; labial very large, turgidly incrassate, 3-jointed— 
1 very minute, 2 very broad and short, deeply excavated at the apex, 3 longer than 2, obtusely conical, 
very broad at the base. Mentum quadrate. Labium very long, oblong, with very strong lateral coste 
terminating in long and very acute paraglossal processes. Lingua long, deeply bifid, ciliated at the points. 
Labrum transversely oval, faintly emarginate. Masillw unilobed, the lobe very large, robust, very strongly 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, January 1888. Q* 
