316 THE ENTOMOLOGIST. 



timber, and the laborious work of their lives is, as in the 

 Longicornes, performed with their mandibles. There are no 

 sexual differences in the legs or feet of Sandalus of much 

 importance, except that the males have slightly dilated tarsi. 



From the rarity of the individuals and the fewness of the 

 species known, my speculation is that the great size of the 

 female is owing to the magnitude of her eggs rather than to the 

 quantity she bears, for if the current ideas on the differentiation 

 and distribution of animals approximately correspond with 

 reality, the greater the number of ova distributed by any female 

 the greater the chance, the other conditions of life being equal, of 

 the individuals becoming abundant and the species wide-spread. 



Sandalus segnis. 



Ovato-elongatus, crassus, griseo-pubescens ; fronte utrinque 

 tuberculato. Mas elytris brunneis ; 1. 11-18 mill. Fcem. elytris 

 thoraceque concoloribus ; 1. 19-25 mill. 



Male. — Head and thorax closely and slightly rugosely 

 punctate, blackish, and densely clothed with a greyish brown 

 pile ; thorax with a medial line, hind angles emarginate and 

 biangular before the scutellum. The forehead is conspicuously 

 tuberculate at the insertion of the antennse. The scutellum is 

 obscurely black, and the elytra brown. The elytra have the 

 suture a little raised, with three distinct dorsal striae, and a 

 fourth nearly obsolete, and visible only on the apical half of the 

 wing-case ; the interstices are punctured in longitudinal but 

 slightly irregular rows, with the spaces between the punctures 

 minutely rugose. 



Female. — Sometimes twice the size of a male, and at others 

 six times as large. The thorax is proportionately broader, and 

 the angles, both at the sides and before the scutellum, are less 

 acute. The elytra are concolorous with the head and thorax, 

 and clothed throughout with a greyish pile ; the punctures in the 

 interstices are less deep and in less regular lines, and the spaces 

 between the punctures are more rugose. The legs are the same 

 colour as the under part of the body in both sexes. 



Found at Nikko and Kashiwagi. Five examples. 



