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92 



ADEPHAGA. 







me sufficiently important to warrant generic separation, although the limits of the 



The more typical species of Platynus are limited in number and found in the south 



of Europe ; but others, receding 



other points of structure, occur in North 



Am 



and in New Zealand 



group, which presents peculiarities of 



Hah. Mexico, near the capital (Flohr) \ Cumbre del Pelado, San Antonio de Arriba 



(Salle), Esperanza (Hoge). 



Named Prist ony elms mexicanus, Chaudoir, MS., in the Salle collection. The species, 

 in fact, resembles a small Pristonychus in its elongate slender form and long legs ; but it 

 has none of the generic characters of that group : the claws are simple ; and the elytra 

 are marked with the large punctures on the third interstice distinctive of the Ancho- 

 menid series, but wanting in Pristonychus and its allies. They are small and faintly 







episterna short and broad. Platynus has been generally treated by modern authors as 

 a section only of a much larger genus, for which many European entomologists have 

 adopted the name Anckomenus (Bonelli), and American entomologists that of Platynus 

 of the same author. The characters which distinguish it from the true Anchomeni seem 















genera may not be rigidly defined 







separated as a genus by Leconte under the name of Bhadine, which he has since with 

 drawn. 



1. Platynus montezumsB. (Tab. IV. fig. 24.) 



Anckomenus montezumce, Bates, Proc. Zool. Soc. 1878, p. 593 \ 



* 



" Elongatus, gracilis, pieeo-niger ; capite ovato ; oculis haud prominentibus, orbitu posteriore sensim angustato ; 

 thorace elongato, truncato-cordato, lateribus explanato-reflexis, angulis posticis rectis ; elytris eonvexis, 



elongato-ovatis, punctulato-striatis, apice oblique sinuatis, marginibus basali et laterali explanato-reflexis ; 

 pedibus elongatis. 

 « Long. 4f-5| lin." 





impressed, and likely to be overlooked, but nevertheless exist in all the examples, viz. 

 one (anterior) near the third stria, and two (posterior) near the second stria. The 

 species differs from European Platyni in its elongate, narrow, and somewhat convex 













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elytra. 







2. Platynus leptodes. (Platynus leptomorphus, Tab. IV. fig. 25.) 





rufus 





simo, palpis articulo terminali setoso ; an tennis articulo tertio quam quartus distincte longiore ; thorace 

 valde angustato, angulis anticis haud prominentibus, posticis acutis, lateribus antice paullo rotundatis postice 

 gradatim ante angulum leviter sinuatis, margine laterali anguste reflexo, basali incurvato ; elytris elongato- 





.ngulis 



tarsis omnibus supra sulcatis. 

 Long. 4| lin. $ . 



Hab. Mexico, Ciudad in Durango (Forrer). 



punctis 



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This singular species resembles, at first sight, the blind Cave-beetles (Anophthalmus) . 











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