No. 9.— 1856-8.] NEW CEYLON COLEOPTERA, 



53 



have placed in the genus Drimostoma, its mentum-tooth is 

 not exactly pointed, but it is altogether narrower than in 

 Distrigus and might well be called " assez aigue" as Dejean 

 describes it, This insect differs, moreover, very materially 

 in general appearance as well as in its details from my Dis-» 

 trigi ; and I feel sure that it belongs to the genus in which 

 I have placed it, although it does not quite agree with La- 

 cordaire's description—the labrum being emarginated in front, 

 the second joint of the maxill. palpi exhibiting nothing un- 

 usual, &c. As to the species which I have established, I fee! 

 very certain that they are new and good ones, as it would 

 appear from the quotations in Lacordaire " Gen. d. Ool." that 

 since Dejean's descriptions no new ones of Indian species 

 have been published. 



These insects live in the manner of the European Feronidce, 

 but appear to affect rather damp localities, some of them 

 take freely to their wings and fly commonly into houses in 

 the evenings during the rainy weather. 



42, DlSTRIGUS COSTATUS. N. 



D. nigerrimus, nitidus, subtilissime parce punctulatus, ore pedibusque 

 piceis, tarsis antennisque castaneis, palpis brunneo-testaceis, long. corp. 

 4flin. 



Capite clypeo fronteque leviter excavatis, hac impressionibus 2 later- 

 alibus semiluuaribus profundissimis rugulisque nonnullis transversis ; 

 mandibulis fortiter sulcatis ; menti dente magna excavato ; thorace Ion- 

 gitudine parum latiore, breviter obcordato, lateribus rotundato, basin 

 versus angustato, basi truncato medio leviter emarginato, antice lateribus 

 fortiter deflexo, dorso posticeque piano, basi longitudinaliter profunde 

 2-impresso, inter impressionibus leviter transversim rugoso, ad marginem 

 ant. et post, obsolete sulculato, dorso rugulis nonnullis transversis subtil- 

 ibus, linea med, longitud. subtili extremis profundis diviso ; elytris 

 profunde striatis, interstitiis fere planis, puncto ad striain 2 m medio ob- 

 soleto ; tarsis dorso fortiter 3-costatis ; prosterno piano. 



Sub quisquiliis in ripis lacus Colombensis communis. 



Apparently closely allied to D. impressicollis, Dej. How- 

 ever, if the description given in the Spec. gen. embraces all 

 the characteristics of this latter species mine is undoubtedly 

 different from it. Dejean says nothing about the costee on the 



