318 Coleopterological Notices. 



lateral angles of the median lobe rather acute and prominent, the apex trun- 

 cate. Middle and hind coxse very widely distant, the latter small, transverse 

 and attaining the metasternal episterna, the latter extremely narrow and 

 linear but dilated behind, the suture fine bat distinct. Anterior and middle 

 legs retractile, the posterior free ; tibiae compressed, slender toward base, 

 swollen and obliquely truncate externally toward apex, the truncate surface 

 smooth and polished and bordered on each side by a fringe of short setae, the 

 external edge carinate from base to the truncation just mentioned ; tarsi 

 slender, the first three joints small, subequal and, in the posterior, together 

 about one-half as long as the fourth ; claws slender, normal. 



The last vestige of the posterior crural excavation is visible as a 

 fine straight line, extending obliquely from the inner side of the 

 coxa and vanishing near apical third of the first segment. 



In the structure of the palpi, maxillary lobes, insertion of the 

 antennae and carination of the mentum this genus is an analogue 

 of Cerylon, but in the retractile legs and antennal excavations it is 

 allied to Murmidius; in fact it constitutes an almost conclusive 

 proof that the Murmidiini are merely a group of the Colydiidae and 

 closely related to the Cerylonini, the principal distinctive features 

 being the 10-jointed antennae received in excavations. In Cerylon 

 the antennae are 11-jointed, the club being composed of two amal- 

 gamated joints as in Murmidius. In Lapethus the club is composed 

 of three fused joints. 



The three genera Cerylon, Lapethus and Murmidius differ how- 

 ever in sternal structure to an astonishing degree, for in Cerylon 

 the prosternal process extends over the surface of the'mesosternum 

 and in Lapethus is received in an emargination of the latter, while 

 in Murmidius the mesosternum extends over the surface of the 

 presternum, advancing considerably upon it and partially conceal- 

 ing the anterior coxae. 



L.. discretus n. sp. — Rather broadly oval, moderately convex, dark rufo- 

 testaceons throughout, highly polished, the upper surface with rather long, 

 fine, erect and stiff setse which are very sparsely distributed. Head feebly 

 convex, extremely finely and sparsely punctate but coarsely and more densely 

 so toward base ; epistomal sutui - e completely obliterated. Prothorax nearly 

 one-half wider than long, at base nearly three times as wide as the head, very 

 strongly narrowed from base to apex, the latter broadly, feebly emarginate, 

 nearly one-half as wide as the base, the latter transverse, broadly, arcuately 

 lobed in the middle, closely fitted to the base of the elytra throughout the 

 width ; sides rather strongly arcuate, nearly parallel in basal third ; disk 

 very vaguely, transverselj r impressed almost throughout the width near the 

 base, very sparsely, moderately finely punctate, the sides margined with a 



