Coleoptera from Chontales. 233 



ADDENDA. * 



OpMstomis nigellus, n. sp. — Linearis, angustus, postice 

 vix attenuatus, niger fere opacus; rostro medio annulo 

 lato, collo, gulaque sanguineis ; antennis articulis 8-11 

 flavescentibus ; thorace antice gradatim attenuate, supra 

 sanguineo, aureo-sericeo, disco macula nigra ; ely tris basi 

 thorace vix latioribus, apice oblique et obtuse truncatis, 

 supra creberrime punctulatis. 



Long. 4| lin. ? . 



Chontalia, nov. gen. 



Sub-fam. Lepturinae, Gen. Ophistomis affinis. Corpus 

 breve, latum, minus convexum. Caput antice rostriforme, 

 postice in collo subito constrictum ; post oculos tubercu- 

 latum. Mandibulge labrum baud longiores. Labrum 

 latum. Antennae in sinu oculorum sitte, filiformes, nee 

 serratae, corpore ( ? ) multo breviores; systema porifera 

 nulla. Thorax campanuliforrais. Elytra apice late ro tun- 

 data. Pedes modice elongati. Abdomen ( ? ) apice 

 late truncatum, baud foveatura. 



The pretty Leptura-torm constituting the type of this 

 genus, differs totally from Ophistomis and Eurypfera in 

 facies and colours ; its blue and yellow clothing, in fact, 

 resembles that of the genera Dorcasomus and Desmocerus. 

 The antennee are inserted within the anterior margin of 

 the notch of the eyes. 



Chontalia cyanicollis, n. sp. — Curta, elongato-oblonga, 

 supra dense subtiliter pubescens, cyanea nitida, elytris 

 dimidio basali flavo-testaceis ; palpis flavo-testaceis ; 

 capite viridescenti, omnino punctulato ; antennis nigris ; 

 thorace punctato, angulis posticis longe productis, acutis ; 

 scutello nigro ; elytris oblongis, postice paululum latiori- 

 bus, aequaliter leviter convexis, punctulatis. 



Long. 5 lin. ? . 



One example, in Mr. Belt's collection. 



Odontocera cegrota, n. sp. — Augusta, gracilis, melleo- 

 flava, vix nitida, antennis, tibiis omnibus apice, femori- 



* Species sent by Mr. Belt since the preceding paper was read. 



