Classification of the Coleopterous family Endomychidae. 69 



very sli<];litly dilated at the end. The dul) of E. dohertyi 

 is of similar form but less dilated. 



The two sexes are almost alike, but specimens with the 

 abdomen more shining (that is, less closely punctured 

 and Jiairy) and the 6th segment distinctly exserted are 

 apparently the males. 



Of the eight specimens mentioned by Gorham under the 

 name of E. dohertyi six belong to the new species, the two 

 from the Ruby Mines district alone agreeing with his 

 figure. 



Genus BoLBOMORrnus. 

 The new species of this genus described below is very 

 interesting as a connecting link between Bolbomorj)hus and 

 Eucteanus, indicating forcibly the non-significant character 

 of the degree of dilatation of the antennal club, which has 

 been treated as of primary importance in the grouping of 

 the genera. In Euctennns occurs the extreme degree of 

 dilatation known in the Endomychidae {E. eucerus Arr.), 

 while in the type-species of Bolhonwrphts {B.yihhosus Gorh.) 

 this feature is reduced almost to its minimum. In the second 

 described species {B. theryi Gorh.) there is, according to the 

 figure, a distinct widening, and in this (the third species) 

 the antennae are in practically the same condition as in 

 Evcteanns hardtvickei Hope, the type-species of that genus, 

 in which they exhibit their least developed phase in 

 Eitcteamis. In its general form B. sex-pimcfatus shows a 

 close approximation to the smaller species of Eucteanns in 

 which external sexual differences are absent, and indeed 

 there is no important feature by which to distinguish them, 

 so that we have a series of closely-related forms showing a 

 complete transition in the shape of the antemia from one 

 extreme to the other. 



Bolbomorphus sex-punctatus, sp. n. 



Brunneiis, antcnnis nigris elytrisque punctis sex parvis flavis 

 ornatis, duobus anterioribus transversim approxiinatis, externo 

 post-humcrali, fere ad marginem, tertioque subapicali remoto ; ovalis, 

 parum elongatus, j)i'onoto sat parvo, fortiter pimctato (lateribus 

 subrugose), marginibus lateralibus bisimiatis, angulis omnibus 

 acutis, basi hand marginato, medio lacvigato, foveis basalibus 

 brevibns; olytris vrtldo convexis, nitidis, fortiter i^unctatis, liuraeris 

 prominentibus ; pedibus gracilibus, tibiis omnibus rectis, versus 



