RHYTIDOBARIS. AQT 
suleate (R. granulosa) from the apex to near the anterior coxa, the latter separated by at least their 
own width; mesosternum depressed, exposed; legs short; femora abruptly excavate near the apex 
beneath, unarmed (R. horrida) or feebly serrate and sulcate (R. granulosa); tibiee strongly unguiculate, 
sinuous and more or less dentate at their outer apical angle (2. horrida), or the intermediate and 
posterior pairs almost straight (R. granulosa), the anterior pair excavate at the apex beneath for the 
reception of the base of the tarsus; tarsal claws short, free or narrowly separated ; body oblong-ovate, 
rugose, setose or squamose. 
Type, BR. horrida. 
The two species placed under Rhytidobaris agree sufficiently well inter se to be 
included in the same genus: the difference in the form of the prosternal sulcus is one 
of degree, and that of the armature of the legs and of the vestiture of the upper 
surface is perhaps unimportant. ‘The present genus is allied to Methyorrhina, Pascoe, 
which has a peculiarly formed rostrum, a large, squamose scutellum, an unimpressed 
prosternum, more approximate anterior coxe, &c. From Glyptobaris it may be known 
by the decussate mandibles, parallel prosternal lines, &c. 
1. Rhytidobaris horrida, sp.n. (Tab. XX. figg. 15, 15 a.) 
Subopaque above, shining beneath, nigro-piceous ; sparsely clothed with rather long, erect, intermixed ochreous 
and blackish setze, the punctures on the under surface each bearing a very minute ochreous scale, the 
legs setulose. Head globose, small, bare, closely punctate, transversely grooved between the eyes; 
rostrum moderately stout, about as long as the head and prothorax, shining, closely, the apical half more 
sparsely, punctate, the antenne inserted near the middle, the funiculus stout, the club small aud densely 
pubescent. Prothorax transverse, broad, narrow and feebly constricted in front, the sides strongly 
rounded anteriorly and slightly converging towards the base ; very densely, finely, confluently punctate, 
the extremely narrow interspaces sinuous or oblique. Elytra comparatively short, punctato-sulcate, 
the interstices very little wider than the sulci, narrowly raised on either side and each with a row of 
shallow oblong impressions. Pygidium short, small, densely punctate. Beneath coarsely, closely 
punctate. Prosternal lines not reaching the anterior coxe, the intercoxal space flat and as wide as the 
coxa. Femora unarmed. Tibiz short, sinuous, acute at their outer apical angle. Tarsal claws free. 
Length 33, breadth 12 millim. (2?) 
Hab, Panama, Caldera in Chiriqui 2100 feet (Champion). 
One specimen. Smaller, narrower, and less rugose than the Brazilian Methyorrhina 
hispida, Pasc., the rostrum arcuate and much more slender, the setze less numerous, 
the scutellum small and almost bare, &c. 
2. Rhytidobaris granulosa, sp. n. (Tab. XX. figg. 16 *, 16 a.) 
Opaque above, shining beneath, nigro-piceous; somewhat sparsely clothed with small, narrow, adpressed 
ochreous scales, those on the prothorax long and hair-like, and those on the elytra oblong-oval and 
clustered into scattered fascicles on the alternate interstices, the third with an oblong patch at the base. 
Head comparatively large, squamose, unimpressed between the eyes, densely punctate; rostrum 
moderately stout, scarcely so long as the head and prothorax, rather sparsely, the basal portion closely, 
punctate, the antenne inserted at a little behind the middle. Prothorax transverse, broad, narrow and 
feebly constricted in front, the sides rounded anteriorly and subparallel at the base; densely, finely, 
* Foreshortened in our figure. 
