226 Mr. H. W. Bates' supplement to the 



Of quite different facies from the long and narrow 

 type-form of C. procerulus from Yokohama, but neverthe- 

 less linked with it by intermediate varieties found in inter- 

 mediate latitudes. It is relatively shorter and especially 

 in the female more ovate than C. procerulus, and the thorax 

 is slightly more rotundate-dilated anteriorly and more 

 contracted posteriorly. In all examples of C. procerulus 

 there is a fine arcuated transverse groove across the 

 basal part of the ventral segments, of which there are 

 scarcely any traces in C. arboreus. 



Carabus exilis. 



C. procerulo proxime affinis sed multo minor et adhuc 

 gracilior. Valde angustatus, fuligineus opacus ; capite 

 coriaceo ; thorace elongato, subcordato-quadrato, antice 

 modice rotundato et postice' parum sinuato-constricto, 

 angulis posticis sat productis, dorso creberrime ruguloso- 

 punctulato, rugulis transversis nee vermiculatis ; elytris 

 angustis, parallelis (foam, lateribus paullo rotundatis) 

 apice fere integris (ad suturam subprolongatis), dorso 

 utrinque striis catenatis 3, lineis elevatis 3 alternatis, 

 omnibus angustis et granulatis, subnitidis, interstitiis 

 depressis opacis haud punctatis minute granulatis ; sub- 

 tus sulculis ventralibus obsoletis. Long. 20 — 24 mm., 

 <?, ? . 



Island of Sado. 



To all appearance a dwarf form of C. procerulus ; but, 

 besides its exceedingly slender (and in the male parallel- 

 sided) form, it differs distinctly in sculpture, the three 

 raised lines between the chain-striae being uninterrupted, 

 and the striae proper or depressed interstices between 

 the raised lines being opaque, with a few granules. In 

 its typical state C. exilis appears to occur only in the 

 Island of Sado. There are scarcely any traces of im- 

 pressed punctures in the strise proper. 



Car a bus tenuiformis. 



C. exili proxime affinis et similis sed differt elytris 

 punctato-striatis. Long. 21 — 23 mm., $ , ? . 



Niohozan and Chiuzenji. 



There is scarcely any difference in form between this 

 and C. exilis, but the striae (or depressed interstices of 



