122 LONGICORNIA. 
2. Tybalmia funeraria. 
T’. cece quoad formam simillima. Magna, subdepressa, supra fusco-ochraceo subtiliter Brentosa, atomis atro- 
fuscis inspersa; elytris post medium utrinque macula magna obliqua subovata postice laciniata atrofusca, 
antice plaga cinereo-ochracea marginata; capite antice ut in 7’. ceca elongato planato, cornibus fronta- 
libus (3) longe porrectis, vertice atrofusco vittulatis ; thorace transversim triplicato, atrofusco maculato, 
tuberculo laterali valido, conico; elytris humeris extantibus paullulum subfalcatis (apice tuberculatis), 
deinde usque ad apicem gradatim angustatis, prope basin utrinque paullo et obtuse elevatis, tota basi sub- 
tiliter punctulato-asperatis. 
Tong. 13 lin. ¢. 
Hab. Mexico, Toxpam (Saldé). 
There is one example of this fine species in M. Sallé’s collection. 
8. Tybalmia turbida. (Jschiocentra maculosa, Tab. VILL. fig. 20.) 
Fusca, tomento ochraceo-fulva maculatim dense vestita; antennis ¢ elongatissimis, (scapo excepto) castaneo- 
rufis ; fronte elevata quadrata (supra nullomodo angustata) ; oculis modice elongatis, fascia suboculari 
lineolisque occipitis fuscis ; cornibus frontalibus elongatis distantibus ; thorace valde transverso, ineequali, 
tuberibus utrinque lateralibus duobus obtusis ; elytris postice parum angustatis, parum convexis, humeris 
prominulis, basi tantum sparse punctatis. 
Long. 10 lin. of. 
Hab. Nicaragua, Chontales (Janson). 
This species is distinguished from 7’. (Ischiocentra) maculosa (Bates), from the Amazons, 
by the lateral prominence of the thorax not forming a distinct conical tubercle ; in colours 
and markings there is a remarkable similarity between the two species. 
The shape of the large vertical forehead in Tybalmia and allied genera is subject to 
abrupt modifications from species to species. In the typical species (7. pupillata) it is 
trapezoidal, the crown being narrowed and the frontal horns thereby brought more 
close y together—a structure affecting the form of the thorax, which is narrowed ante- 
riorly almost as in Jamesia. In T. ceca the forehead is rectangular; but in other 
respects there is so close an affinity that it is impossible to separate the two species. 
Such being the case, it is necessary to transfer to Zybalmia those species described as 
Ischiocentre which have a similar form of forehead and of frontal horns, these features 
evidently presenting more reliable characters than the form of the forehead. In Ischio- 
centra clavata, the type of the genus, the frontal horns are vertical and the thorax sub- 
cylindrical. 
4, Tybalmia heraldica. (Jschiocentra heraldica, Tab. VIII. fig. 21.) 
Ischiocentra heraldica, Bates, Trans. Ent. Soc. 1872, p. 2017. 
Hab. Nicaragua, Chontales (Belt *). 
