264 Mr. J.S. Baly on new Genera und Species of Hispide. 
the middle, sinuate just behind the anterior angles ; disk smooth, 
impunctate, sides rugose-punctate. Elytra subparallel, slightly 
increasing in width towards the hinder angles; posterior spine 
keeled above. Four anterior tibize armed just before their apex 
within with a short tooth. 
Tam indebted for a specimen of this beautiful species to the 
liberality of Herr Dohrn, of Stettin. 
2. Third to sixth joints (inclusive) of antennz intimately connected ; 
their sutural Imes distinct. 
Acaithodes nigripennis, n. sp. 
A. elongata, dorso subdepressa, rufa, nitida; capite, thoracis vitta 
utrinque elytrisque nigris. 
Long. 4 lin. 
Hab, Cayenne. 
Elongate, shining red; head, a short vitta on either side of 
the thorax, its extreme apical margin, together with the elytra 
shining black. Head slightly excav: ated on the forchead; vertex 
shining, gee anfennee with the articulations between 
the third and the three followi ving joints visible under a lens. 
Thorax nearly one-third broader at the base than long; sides 
rounded, narrowed in front, above subcylindrical, deeply ex- 
cavated transversely near the base; surface impressed here and 
there with deep distinct punctures, a black stripe on either side 
closely punctured, subrugose. Scutellum impunetate, shining 
red. Elytra much broader than the thorax, sides parallel, their 
outer edge armed with fine, distinct serratures, posterior angles 
produced directly backwards into a stout acute spine; above 
subconvex, slightly Hattened along the suture; each elytron 
with three elevated cost, the outer one less raised than the 
others, mterstiees impressed with a double row of deep regular 
punctures, the third interstice from the suture irregularly punc- 
tured along the posterior two-thirds of its course. Beneath 
shining rufous ; apex of abdomen piccous. 
Unique i in my own collection. 
3. Third to sixth joints of antenne distinctly separate. 
Acanthodes tarsata, 1. sp. 
A. clongata, dorso depressa, sata paullo ampliata, obscure nigro- 
eenea, nitida; pedibus fulvis, tarsis antennisque nigris, his apice 
acutis, articulis 24° ad 6'™™ distinctis, transversis, Saath oe mibus ; 
thorace conico, profunde punctato ; elytris angulo postico in spi- 
nam latam acutam, dorso concavam, lateraliter oblique productis ; 
utroque tricostato, interspatiis profunde bifariam punctatis, inter- 
