46 



Head rather large, yellow ; eyes small and prominent, black ; antennae long and 

 slender, with the two apical joints bright yellow, the others dusky yellow. 



Thorax nither small, circularly rounded and moderately reflexed in front, rufescent 

 with the disc castaneous, moderately and rather closely punctured, with the 

 interstices indistinctly alutaceous ; basal margin faintly sinuated, with the 

 angles right angles. 



Scutelliim moderate, rounded, and punctured. 



Elytra castaneous, with a spot on the shoulders, a large aquiliform mark on the 

 disc, and all the margins bright rufous, much broader, twice longer, and more 

 deeply punctured than the thorax, widest before the middle, sides rather 

 broadly margined, extremities narrowed and much rounded. 



Ahdovun much exserted, attenuated towards the extremity, with part of three 

 segments exposed, rather closely punctured, castaneous, with the apical seg- 

 ments yellow. 



Legs long and slender, bright yellow. 



Under parts rcmotel}' punctured, castaneous, with the head, prothorax, and apical 

 segments of the venter yellow. 



Differs from all others in its very large size, broad form, and peculiar markings. 



Habitat, Mysol. Taken by Mr. Wallace. 



I have carefully examined the external anatomy of this verj- fine species, and 

 dissected the organs of its mouth, and, with the single exception that the pro- 

 sternum is unusually short, can find no difiference in any respect from the most 

 normal type of Saciion. 



Sacium Oberthuri. 



Arthrolips Oberthuri, Reitter, Verb. Zool.-bot. Gess. pp. 165, 194, 1878. 



Sacium LeContei, Matthews, Biol. Centr.-Amer., Col. ii. pt. i. p. 109, tab. 15, a, b. 



L.c. ls~i'o lin. = l"50-l"75 mm. — Elongato-ovale, modice convexum, nitidulum, 

 modice et distincte punctatum, pilis aureis vestitum, nigrum, interdum concolor, 

 interdum pronoto atque elytris plus minusve rufo-maculatum ; pronoto parvo, 

 antice valde attenuato atque ovaliter rotundato, margine anteriori modice reflexa, 

 distincte punctato, interstitiis nitidis, i)lus minusve rufo, lineii basali sat distincta, 

 margine basali profunde sinuata, angulis acutis ; eli/tris magnis, pronoto multum 

 latioribus et duplo longioribus, ante media latissimis, distincte et sat profunde 

 punctatis, stria suturali distincta, nigris aut nigro-piceis, plerumque fascia trans- 

 versa, recta, lata, pone media, atque aliquando apicibus, maculisque nonnullis 

 humcralibus, plus minusve lajte ruiis, lateribus marginatis, apicibus parum attenu- 

 atis, rotundatis ; pygidio piceo ; pedibus atque antennis rufis. 



Body elongate-oval, moderately convex and shining, moderately and distinctly 

 punctured, clothed with golden hair, sometimes wholly black, generally with a 

 straight, transverse red fascia on the elytra, and often with the thorax and 

 shoulders and extremities of the elytra more or less marked with red. 



Head small, rufous ; eyes small, not prominent ; antenna moderate, rufous, with 

 the club large and dusky. 



Thorax small, mucli attenuated, and ovally rounded in front, with the margin 

 moderatelj' reflexed, distinctly punctured, with the interstices shining, more or 

 less suffused with red ; basal line distinct, basal margin deeply sinuated, with 

 the angles rather acute. 



Scutelliim moderate, rounded, and punctured. 



Elytra large, much broader and twice longer than the thorax, widest before the 

 middle, distinctly and rather deeply punctured, interstices smooth and shining, 

 sutural stria distinct, sometimes wholly black, generally black or piceous, 

 with a rather broad, straight, transverse red fascia beyond the middle, and 



