Coleoptera from Chontales. 195 



Pleuromenus semicostatus , n. sp. — Parallelopipedus, 

 niger nitidus ; capite grosse punctato, tuberibus antenni- 

 feris vix elevatis nee acuminatis ; tborace rbomboideo, 

 supra sparsim punctato, utrinque plaga magna lateral! 

 intus curvata sanguinea, tubere magno elongate obliquo 

 tegenti ; scutello valde elongato, lasvi lateribus incurva- 

 tis ; elytris apice late angulatim rotundatis extus breviter 

 dentatis, supra prope basin glabris et sparsim punctatis, 

 deinde nigro-tomentosis opacis costis quatuor leevibus, 

 utrinque flavo bifasciatus, prima ante secunda longe post 

 medium, fasciis glabris ; prosterno inter coxas convexo ; 

 mesosterno valde elevate antice vertical!. 



Long. 8 lin. $ . 



This handsome species was sent to me by Mr. T. Rea- 

 kirt of Philadelphia, as coming from Nicaragua. Although 

 differing from P. haccifer in several points of structure, 

 the many important features of resemblance evidently 

 show a generic relationship. 



Trachyderes elegans, Dupont, Mag. Zool. pi. 154, f. 1. 

 — Chontales specimens are darker in colour than those 

 of Mexico, and the yellow rings of the antennee are often 

 absent from the fourth and fifth joints. 



Trachyderes interruptus, Dupont, Mag. Zool. pi. 158, f. 

 2. — Found also in New Granada. 



Megaderus latifasciatus, Bates, Trans. Ent. Soc. 1870. 

 p. 438. — Chontales. 



Section. C. 



Antennae inserted close to the base of the mandibles. 

 Eyes coarsely facetted. 



Distenia Pilatei, Chevrolat, Rev. & Mag. Zool. 1857, 

 No. 3, pi. 6, f. 2. — Originally found at Teapa and Cordova, 

 Mexico. Mr. Belt has taken many examples in Chon- 

 tales. The D.fimhriata described by Lacordaire (Genera, 

 ix. p. 228, note) from an unknown locality, must closely 

 resemble this fine species. 



Distenia geniculata, n. sp. — D. undatce afiinis, fusco- 

 nigra nitida, sparsim pubescens haud tomentosa sicut D. 

 undata, antennis et pedibus rufis, geniculis (haud armatis) 

 iiigris ; palpis nigris articulo terminal! obtuse acuminato ; 



TRANS. ENT. SOO. 1872. — PART III. (AUGUST.) P 



