SCOPAUS. 541 
and finely punctured, without smooth line or basal depressions, slightly shining. 
Elytra slightly longer than the thorax, finely and excessively densely punctured, 
quite dull. Legs yellow. 
The male of this obscure insect has a most extraordinary sexual character, the 
penultimate ventral plate being deeply and broadly excised quite to its base, and from 
the middle of the excision there projects backwards a long slender ligula, which attains 
the extremity of the body, and is there acuminate and curved upwards, appearing 
something like a sting. A single example of each sex. | 
2. Scopzus latitarsis. 
Latiusculus, subtilissime punctulatus, subopacus, rufescens, elytris fuscescentibus ; tarsis omnibus brevibus, 
latis, anterioribus subdilatatis. 
_ Long. 34 millim, 
Hab. Panama, Bugaba (Champion). 
Antenne rather long, the penultimate joint about as long as broad. Head broad, 
subquadrate, the vertex emarginate, the hind angles but little rounded, the surface 
excessively finely punctate, not shining. Thorax broad, much rounded at the sides, 
like the head excessively finely punctate, scarcely visibly impressed on either side at 
- the base. Elytra rather elongate, a good deal longer than the thorax, like the head and 
thorax very finely punctate but darker in colour. Front tarsi short, slightly dilated ; 
the other feet with the terminal joint stout, so that the tarsus has the appearance 
of being almost broader at the extremity than at the base. 
Only a single example has been met with; it is a female, in a very decayed condition, 
so that it will not bear much manipulation after being unmounted. Although it no doubt 
_ approaches the genus Scopeomerus, it certainly cannot be placed there, as the front 
tarsi are scarcely at all dilated, and the labrum appears to be bidenticulate; probably 
the species may prove to be allied structurally to the Amazonian 8. ¢arsalis, Sharp. 
3. Scopzus vilis. 
Subparallelus, subtilissime punctulatus, subopacus, pallidus, rufescens, antennis pedibusque testaceis; capite 
subquadrato, posterius leviter emarginato. 
Long. 3 millim. 
Hab. Panama, Bugaba (Champion). 
Antenne rather long and slender; third joint scarcely so long as the second, about 
equal to the fourth, the tenth joint about as long as broad. Head about as broad as 
the elytra, straight at the sides, the hind angles a little rounded, the vertex distinctly 
emarginate in the middle, the surface excessively finely punctate, almost dull. Thorax 
rather broad, scarcely narrower than the head, much rounded at the sides, with a feeble 
but elongate depression on either side of the middle at the base. LElytra elongate, 
longer than the thorax, similarly coloured and punctate. The male has two almost 
