DIPLOTAXIS. 163 



16. Diplotaxis atramentaria. 



Oblonga, convexa, piceo-nigra ; subtus piceo- vel castaneo-rufa, glabra, subtilissime alutacea, sericeo-opaca ; 

 antennis palpisque testaceo-rufis ; capifce dense nee grosse subalveolato-punctato, sutura frontali valde 

 flexuosa ; clypeo brevi, lateribus valde convergentibus, subrotundatis ( $ ?), apice truncate* ( tf ?), cura 

 angulis breviter dentatis ; thorace prope medium sat fortiter dilatato, antice recte postice rotundatim 

 angustato, angulis anticis acutis, posticis obtusis sed distinctis, supra minute distanter punctato ; elytris 

 disperse subtilius punetatis, costis latis vix elevatis, interstitio suturali pluripunctulato ; pygidio profunde 

 discrete, ventre dispersius, rotundato-punetatis ; tibiis anticis valide tridentatis ; unguibus normalibus 

 (fissis dentibus subsequalibus). 



Long. 9-10 millim. 



Hah. Mexico, Peras (Salle), Villa Lerdo in Durango, Cuernavaca (Edge). 



Named B. atramentaria (Deyr. MS.) and D. ruficornis (Sturm, MS.) in the Salle 

 collection. Many examples. 



The supposed female differs from the male, apart from the much shorter clypeus, in 

 the large punctures on the sides and apex of the ventral surface being much fewer in 

 number, and in the lower tooth of the claws being a little broader and more curved. 



17. Diplotaxis arctifrons. 



Oblonga, nigra, subnitida, supra glabra; clypeo mediocriter elongato, antice valde flexuoso-angustato, apice 

 reflexo, breviter sinuato-truncato, <$ acutius, $ obtusius bidentato, toto capite dense punctato, palpis 

 antennisque testaceo-rufis ; thorace (elytris baud angustiore) transverso, medio late dilatato, discrete baud 

 grosse punctato, angulis anticis rectis, posticis obtusis sed distinctis ; elytris grossius subdisperse pune- 

 tatis, costis vix punctulatis : pygidio et ventre grosse sparsim punetatis ; unguibus fissis, dente inferiore 

 paullo breviore. 



Long. 6-7g millim. 



Hah. Mexico, Durango city (Hbge). A good series of examples. 



18. Diplotaxis — ? 



Hah. Mexico (Salle, ex coll. Sturm). 



An example of this apparently very distinct species, allied to the preceding, but of 

 metallic colours, is contained in the Salle collection ; it is labelled D. ceneipennis, 

 Sturm, MS. 



19. Diplotaxis ? 



Hah. Mexico, Playa Vicente (Salle). 



One specimen of a species also apparently distinct. 



20. Diplotaxis (?) ? 



Hah. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 



A single example, apparently female, of a species perhaps belonging to this genus, 

 but possibly a Liogenys. 



YY2 



