180 



Under parts castaueous. 



Differs from li. riijicollis in its smaller size, oval form, and fainter sculpture ; from 



li. puiniliis in its perfectly oval form, much lighter sculpture, and smaller 



antennae. 



Ilabildl, Central America. Found near the city of Guatemala Ijy Mr. Champion. 



Rhypobius dissimilis, sp. n. 



L. c. J-;, liu. = 0'76 mm. — Ovatus, valde convexus, nitidissimus, pilorum expers, 

 elytris piceis, pronoto rufescenti ; ntjiiie magno, rufo, oculis nigris, antennis sat 

 brevihus, \aele tlavis, articulo septinio intus inerassato ; pnmoto raagno, rufo, antice 

 ovaliter rotundato et raarginato, impunctato, nitidissimo, margine hasali leviter 

 sinuato, angulis acutis ; eli/tris i)ieeis, pronoto duplo longioribus, hand latioribus, 

 ad humeros latissimis, ])ostice attenuatis, sat profunde et confertim asperatis, niti- 

 dissimis, lateribus marginatis, apicibus obtusis ; p3'gidio exserto, flavescenti ; pedibus 

 laete aurantiacis. 



Body ovate, verj' convex, and very shining, without hairs, elytra piceous, thorax 



rufescent. 

 Head large, rufous ; eyes black ; antenniB rather short, bright j'ellow, with the 



seventh joint incrassated on the inner side. 

 Thorax large, rufous, ovally rounded and margined in front, impunctate and very 



shining, basal margin faintlj' sinuated, with the angles acute. 

 Sciiti'Unm moderate, rounded. 

 FJ)llrii jiiceous, twice longer but not broader than the thorax, widest at the 



shoulders, attenuated posteriorly, rather deeply and closely asperated, very 



shining, sides margined, pxtremities obtuse. 

 Abdomen with the pygidium exposed, yellow. 

 Legs robust, bright orange. 

 Under parts rufo-piceous. 

 Differs from otiiers in its smaller size, posteriorly attenuated form, thorax and 



elytra distinctly margined, impunctate thorax, rather short antenu.e with the 



seventh joint produced on the inner side. 

 Habitat, America. Found on the island of St. Vincent by Mr. Smith. 



I feel some hesitation in placing this species in the genus Rlimiohiiis, but since 

 on careful dissection all the organs of the mouth, especially the extraordinary linear 

 mandibles, and also the shape and disposition of the various parts of the external 

 skeleton of the under side, differ in no respect from the corresponding parts of the 

 most normal s()ecies of lihi/pvhius, I think it better to place it with them than to 

 create a new genus for its reception. 



ORTHOPERUS. Pl. VII., A. 



Orthoperus, Steph. 111. Brit. Entom. Aland, ii. p. 18G, 1829. 

 Oniptophaqus, p. Gyll. Ins. Suec. i. p. 185. 

 Dermestes] p. Marsh. Col. Brit. p. 80, 1802. 

 Mivrospluera, Eedtenbacher, Faun. Aust. p. 159, 1849. 

 Pitophibis, Heer, Faun. Helv. p. 433, 1841. 



Corpus ovale vel ovatum, plerumque valde convexum et nitidum, vcl omuino 

 glabrum, vel pilis exiguis sparsissinie vestitum. 



Caput ultra pronotum partim extensum. 



Antenme (PI. VII., A, lig. 7) geniculate, novem-articulatfe ; 1 permagno, pyriformi, 

 leviter recurvato; 2 primo parum minori, pyriformi; 3 et 4 parvis, fere 

 transversis ; 5 magno, valde inerassato ; 6 iterum parvo, transverso ; 7, 8 et 9 



