CANAEIAN COLEOPTERA. 109 



satisfy myself of its possessing the additional apical abdominal seg- 

 ment which is characteristic of the male Brachypterl ; whilst, more- 

 over, the sexual differences of its prothorax, the longer and more aci- 

 culated joint of its maxillary palpi, and its scarcely prominent para- 

 glossoe are other (though not very important) points in which it re- 

 cedes from the Brachypteri proper. But, apart from these consider- 

 ations, the peculiarities of its legs (which, together with the antennae, 

 are considerably elongated in the male sex) are so decided that I can- 

 not but believe that it ought to be separated from that genus. Thus, 

 they are not merely longer than those of the Brack i/pteri, but their 

 femora are constricted beneath before the extremity so as to shape 

 out a conspicuous anguliform tooth, their tibise are slenderer, being 

 less dilated at the apex (where also the front pair have their inner 

 terminal sj)ur* strong, large, and flexuose) and greatly curved in the 

 male sex, and the basal joint of their tarsi is considerably less widened 

 than the following two. The tibite (and even the femora), when 

 viewed beneath a high microscopic jjower, are minutely serrated along 

 their inner edge ; and in the front pair of the males the outer angle 

 is obliquely lopped-off, or truncated, giving that part of the leg a 

 very singular appearance. These curious sexual modifications of the 

 legs are quite unnoticed in all the generic and subgeneric diagnoses 

 both of Bracliypterus and Cercus to which I have had access ; but in 

 the unproduced hinder angles of its prothorax, and the globose, im- 

 mensely developed ultimate joint of its labial palpi, HeterohracMum 

 has more in common mth the normal Brachypterl than with M. 

 Duval's Heterostomus. 



180. Heterobrachium longimanum, n. sp. 



H. oblongo-ovatum, testaceum vel fusco-testaceum, subnitidum, pu- 

 bescens, dense punctatum ; prothorace ad latera rotundato, posticc 

 truneato ; elytris vix paUidioribus, per suturam (jiraBsertim antice) 

 plus minus suffuse et anguste fusccscentibus ; antennarum clava 

 vix obscuriore ; tarsis ad apicem ipsissimum nigris. 



Mas paulo major, prothorace latiore, magis rotundato, convexo, an- 

 tennis pedibusque longioribus, tibiis anticis eurvatis. 



F(xm. paulo minor, prothorace minore, minus convexo, antennis pedi- 

 busque brevioribus, tibiis subrectis. — Long. corp. hn. |— 1. 



Hahitat in excelsioribus sylvaticis Teneriifae et Palmas, rarissimum. 



Apparently extremely rare, — the only spots in which I have taken 

 it being on the summit of the sylvan range above Taganana and Las 

 Mercedes of Teneriffe, and in Palma. 



* The calcaria in the four hinder feet are both of them small, and subeqiial. 



