the Coleopterous Genus Hexodon. 501) 



pedibus, prothoracis lat«ribus clytrorumque cpipleuris Isete rufis ; 

 Ciipitc aiitice minute cmarginato, sutura clypeali fere toto 

 obsoloto ; pronoto brovi. angulis posticis rotundatis, vix pro- 

 ductis, basi licvissime arcuato ; scutcllo lato, paulo concavo, 

 opaco, subtiliter ruguloso ; elytris convexis, latcribus ubique 

 rcgularitcr arcuatis, antice late explanatis, apicibus conjunctim 

 rccte subtruncatis ; processu prosteniali prominontissimo, gracili. 

 Long. 25 mm. ; lat. max. IS'o mm. 



Hub. S.W. Mailatijasoar : near Fort Dauphin. 



The male type specimen in the British ^luseum is the 

 only example of the species known to me. It has the nearly 

 circular outline of H. montandoni, but is much less convex 

 and more nearly related to II. latissimum. The coloration is 

 quite peculiar. The ground-colour is a reddish chocolate, 

 with the legs rather bright red, and the posterior part of the 

 head and the middle of the pronotura, except a narrow median 

 red line, nearly black. The hind angles ot" the pronotum 

 are rounded and scarcely produced. The prosternal process 

 is very long and slender. 



Hexodon latissimum, sp. n. (See fig. 5.) 



Nigrum, corpora subtus nitido, supra opaco, griseo-vestito, sed 

 mesonoto polito, uitido, scutello lato, crcbre punctulato ; capite, 

 prothorace, clytrorumque costis obscurioribus, costis ad marginom 

 anticam (duabus intornis uonnunquam ctiam ad medium) cou- 

 tlucntibus, postice abbreviatis ; corpore latissimo, fere circulari, 

 pronoto antice valde contracto, basi omnino fere regulariter 

 emarginato, angulis posticis acutis ; elytris conjunctim latioribus 

 quam longioribus, apicibus recto subtruncatis, lateribus antice 

 late deplanatis ; processu prosteniali erecto, sat gracili. 



Long. 25 mm. ; lat. 18-19 mm. 



Hab. N.W. Madagascar ; Majunga. 



The British Museum is indebted for a specimen of this to 

 Dr. A. Sicard, in whose collection there is a second specimen. 



This species is very closely related to IJ. griseosericanSy 

 although the much greater breadth of the elytra gives it a 

 very different appearance. The dark elytral costae are nearly 

 parallel and not irregular as in H. reticulatum and are 

 alternately strongly and feebly developed. The first and 

 second primary costje terminate at the apical callus and in 

 the type specimen they also unite in the middle; but this 

 may be exceptional, as in some examples of H. reticulatum. 

 The second, third, and fourth primary costs, and the inter- 

 vening secondary ones, unite at the humeral callus, which 

 lies in the middle of the anterior margin. The apical callus 

 lies nearer to the apical and sutural edges of the elytron 



