82 OTIORHYJfCHID^. 



[Horn. 



from the first by an arcuate suture. Articular cavities of hind tibia 

 variable. Claws free. As represented in our fauna, this tribe does not 

 differ from the group indicated by Lacordaire, except in the addition of 

 Pandcletejus. 



Our genera are as follows : 

 Anterior coxte contiguous. 



Thorax feebly lobed behind the eyes, (the 

 latter transversely oval, pointed beneath) 



and bisinuate at base PACHN.^US. 



Thorax not lobed, base truncate, eyes round, 

 or longitudinally oval. 

 Anterior femora normal, the tibiae simple... TANYMECUS. 



Anterior femora much longer and stouter 

 than the others, the tibiae denticulate 



within HADROMERUS. 



Anterior coxse distant. 



Anterior femora larger than the others.. PANDELETEJUS. 

 The articular cavities of the hind tibite vary in the genera. They are 

 feebly enclosed in PacJmmus, more decidedlj- in Tanymecus, and entirely 

 open in the other two genera. Into this tribe Polydacris modestus of 

 Cuba should enter. It has very distinct vibrissse composed of scales, and 

 the anterior coxae are separated as in Pandeletejus. The tribe as thus con- 

 stituted is not very homogeneous, and with more genera would divide into 

 well defined groups, each of the above genera constituting a type. With 

 our few genera this appears unnecessary. 



PACHNJEUS Sch. 



PachtKBUs Schonh. Cure. Disp. Meth. p. 121. 



Rostrum as long as the head, sub- quadrangular, slightly declivous at tip 

 and emarginate, above obtusely carinate. Scrobes lateral, deep, well de- 

 fined, narrow, arcuate and passing directly beneath the eyes. Antennae 

 sub-median, moderate ; scape gradually clavate, attaining the posterior 

 margin of the eyes ; funicle 7-jointed, first two joints longer, the second 

 somewhat longer than the first, joints 3-7 sub- equal ; club oval, pointed. 

 Eyes oval, narrower beneath. Thorax broader than long, narrower in 

 front, apex slightly prolonged, base bisinuate. Scutellum moderate 

 rounded. Elytra oblong oval, each acute at tip, base bisinuate and wider 

 than the thorax, humeri oblique. Intercoxal process broad, arcuate at tip; 

 second abdominal segment as long as the two following, separated from 

 the first by a strongly arcuate suture. Tibiae finely mucronate at tip. 

 Posterior corbels very feeblj'- cavernous. The slight process at the side of 

 the thorax behind the eyes scarcely warrants the name of ocular lobe. The 

 vibrissse are, however, well marked. The genae are extremely feebly 

 emarginate. 



P. opalus Oliv. {CurcuUo) Ent. v, 83, p. 339, pi. 24, fig. 345 ; Boh. 

 Sch. Gen. Cure, vi, 1, p. 425. 



