Coleoptera from Chonkdes. 179 



Agrees with Peribceuin iu all its characters, except the 

 much less coarse facetting of the eyes, and their much 

 smaller volume and prominence. In this character it dif- 

 fers entirely from the subfamily, and even from the section 

 to which Periboeum belongs. In some essential respects 

 it resembles Steuosphenus, and in others Alloesia, of the 

 sub-family Heteropsinm, section B., but the carinated 

 antennae and tibise bring it within the definition of the 

 Sphaerion group. 



Ironeus duplex, n. sp. — -Elongatus, vix convexus, niger, 

 sparsim subtenuiter griseo-pubescens, femoribus rufis: 

 capite et thorace parce, antennarum articulo prime grosse, 

 punctatis ; elytrorum pubescentia erecta. 



Long. 5 lin. S . 



One example ; Chontales 



Mallocera spimcolUs, n. sp. — M. ylaucce, Serv. similis, 

 diflfert elytris utrinque unispinosis : minus elongata 

 tomento sericeo cinereo-olivaceo vestita ; thorace angusto, 

 cylindrico, antice hand constricto, tuberculo laterali acuto, 

 subspinoso, disco antico tuberculis duobus, lineolaque 

 mediana, nigris, nudis ; elytris desupervisis olivaceo- 

 nigris, fasciis tribus argenteo-sericeis, Ima prope basin ad 

 sutura interrupta, 2nda et 3ia pone medium, hac ad sutui-a 

 interrupta; femoribus basi castaneo-rufis, apice haud spi- 

 nosis. 



Long. 8 lin. (^ . 



Agrees with M. Amazonica (Bates), in the unispinose 

 apices of the elytra, but differs in the sharp lateral 

 tubercles of the thorax, and other characters. 



Chontales. 



Hexoplon alhipenne, n. sp. — Sublineare, capite, anten- 

 narum articulis duobus basalibus, et thorace, castaneis, 

 politis, hoc lateribus obscurioribus ; antennarum caeteris 

 articulis, pedibus et elytris, albo-testaceis, his utrinque 

 nigro-trimaculatis, maculis Ima (prope basin), 2nda dis- 

 coidali, linearibus, 3ia ante apicem triang'ulari, apice for- 

 titer siiiuatis et bispinosis ; corpore subtus castaneo- 

 nitido, pectore cinereo-hirto. 



Long. 6 lin. ^ . 



This elegant species appears rare in Chontales. The 

 thorax is nearly perfectly cylindrical, and very little con- 

 vex, very long and narrow, with the posterior constriction 



TRANS. ENT. SOC. 1872. — PART III. (AUOrST.) O 



