17 



CARABIl).*.. 

 GIGADEMA. 



6. eremitd, sp. iiov. Sat breve, sat latum ; iiitidum ; aterrimuin 

 antennis apicein versus fulvo-pubescentibus ; capita magiio 

 pone oculos minus constrioto, labro minus elongate sparsis- 

 sime punctulato ; pi'othorace quam longiori (maris fere tribns 

 partibus, feminas minus quam duabus partibus) latiori, 

 canaliculato, disco transversim strigato vix punctulato, 

 partibus ceteris fortiter sat crebre punctulatis, angulis 

 anticis rotundatis partem interjaoentem sinuato-truncatani 

 (maris sat fortiter, feminiu vix manifeste) superantibus, 

 lateribus crenulatis fortiter rotundatis mox ante basin 

 oblique fere rectis, basi late emarginata ; elytris striatis, 

 mterstitiis parum convexis puncturis sat raagnis biseriatim 

 sat crebre ornatis; femoribus anticis subtus ad basin angu- 

 latim dilatatis ; ligula in medio longitudinaliter planata, 

 parte planata utrinque carinata (carinis retrorsum conver 

 gentibus). Long., 16—18 1. : lat., C 1. 



The comparatively short wide form, the large liead, and the 

 deep coal-black colour of this species associate it with 

 cr. Bostocki, Cast., from whicli it may be at once separated by its 

 nmch stouter and less-finely pointed mandibles, by its shorter 

 labrum, and the very difi'erent sculpture of its elytra, the inter- 

 stices of which are less fiat and much more closely and evenly punc- 

 tured; the punctures running (as in Bostocki) in two well-defined 

 isolated rows down each interstice (except close to the margin, 

 where they become more confused), but being very much stronger, 

 and more closely and evenly placed in the rows. It is very likely 

 to be tlie insect mentioned by Dr. Gestro (Ann. Mus. Gen., 1875, 

 p. 1^8) as having been, in his opinion, mistaken by the Baron de 

 Chaudoir for G. Bostocki. 



-1 he sexual differences in this species are very peculiar. I do 

 not think there is any room for doubting that the two examples 

 before me are conspecitic, nor, of course, can I doubt that the 

 example with the anterior tarsi subdilated and clothed beneath 

 is the male. The otlier example, however, is the smaller one, and 

 it has the narrower prothorax, the middle part of the front of 

 which is more pn)minent than it is in the male. I notice that 

 the apical dorsal segment in the male is oljsoletely notched 

 behind. 



-trom <J. lonyipenne, Germ., this species may be at once dis- 



inguished by, hiter alia, its larger head, shorter labrum, ligula 



longitudinally flattened and carinate, shorter and broader form \ 



w'^ ^' 9'^'*'*'^«> MacL, by the sides of its prothorax being crenu- 



" and strongly sinuate behind; from G. titan by its wider and 



B 



late ; 



