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ADEPHAGA. 



3. Ega fuscoaenea. 



ia fuscoaenea, Motsclmlsky, Bull. Mosc. 1864, iii. p. 220 \ 



Hob. Panama 1 . 



According to the brief description, a well-marked and distinct species, but unknown 

 me. 



Subdivision G. Obtusip ennes . 



The genera Leptotrachelus, Ctenodactyla, Amblycoleus, Heocagonia, and their immediate 

 allies, hitherto classed by systematists in the Truncatipennes series, although the 

 elytra present no trace of truncature, constitute this new subdivision. A point of 



included 



Subfam. CTEFOLACTYLIFJE. 



LEPTOTRACHELUS. 



r 



Leptotrachelus, Latreille, Regne Animal, 2 ed. iv. p. 371 (1829). 

 Rhagocrepis, Eschscholtz, Zool. Atlas, ii. p. 5 (1829) . 

 Spheracra, Say, Trans. Amer. Phil. Soc. iv. p. 412 (1834). 



Twenty-five species of this characteristic American genus have been described, all 

 tropical, except one, which is a well-known insect of the United States. Many of the 

 species are founded on extremely slight differences ; and it is doubtful if they can be 



maintained. 



l. Leptotrachelus mexicanus. 



Leptotrachelus mexicanus, Chaudoir, Bull. Mosc. 1852, i. p. 32. 



Leptotrachelus dorsalis (Fab.), Chaudoir, loc. cit. 1848, i. p. 59. 



Hab. Mexico, Cordova, Tehuantepec (SalU), Misantla (Edge), Jalapa (Flohr) ; 

 Guatemala, San Geronimo, El Jicaro, Capetillo ( Champion) ; Nicaragua, Chontales 



(Janson) ; Panama, David (Chontales). 



The specimens from Chontales and David differ somewhat from all the others in the 



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which has hitherto escaped notice amply justifies this separation. It is the 





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interrupted margin of the elytra before the apex, which is almost as well developed in 

 Ctenodactyla, the broader species of Leptotrachelus (L. trifasciata), and Eexagonia, as 

 in the Pterostichinse. The significance of this feature is not materially diminished by 

 the fact that the notch in the margin is obsolete in the typical species of Leptotra- 

 chelus, the ridge on the under surface of the elytra being retained in a rudimentary 

 condition in those species. The Australian genus Amblytelus and an undescribed genus 

 from West Africa belong to the subdivision, the former as a subfamily equivalent to 

 Ctenodactylinse. Luplynes (Schmidt-Goebel), in which the elytral margin and ridge are 





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in a condition similar to that of the typical species of Leptotrachelus, may also be 



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