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PLATYSMA.— OPHRYOGASTEE 



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number of species characteristic of high northern latitudes, one species being a 

 member of the limited coleopterous fauna of Iceland. In facies they resemble many- 

 species of the restricted genus Pterostichus, from which they are distinguishable by 

 the longer and narrower episterna of the metathorax. The following species has a 

 very great resemblance to the European P. oblongopunctata, from which it differs, 

 inter alia, in the metathoracic episterma being conspicuously longer and narrower. 



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l. Platysma tropicalis. (Tab. IV. fig. 9.) 



P. oblong opunctatce similis; senescenti-nigra, palpis, antermis pedibusque rufescenti-piceis ; capite ut in ilia 

 specie ; thoraee transverso, lateribus fortius rotundatis ante basin valde sinuatis, angulis posticis acutis, 

 extantibus, anticis fortiter deflexis, basi punctatis, fovea lineari profunda ; elytris tenuiter, plus minusve 

 punctulato, striatis, interstitiis planis, utrinque trifoveatis ; tarsis posticis articulis l°-4 m utrinque sulcatis. 



Long. 5 lin. tf $ • 



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Hob. Mexico, Las Vigas, Oaxaca (Hbge). 



The elytra! foveas have each in the centre, as in the allied species, an umbilicated 



puncture. The first puncture is situated close to the third stria, the second and the 



third near to the second stria, but all on the third interstice. As in P. oblongo- 

 punctata the lateral rim of the thorax is much elevated near the base, and the 



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formed bv an extension of the rim, on which is the 



ferous puncture 



PIESMUS. 



N. York. iv. id. 340 (1848) : id. Proc. Ac. N 



A genus retained as distinct by Dr. Leconte in his latest revision of the Pterostichinee 

 of the United States, on account of the simple tooth of the mentum. The following 



is the only known species :— 



l. Piesmus submarginatus. 



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Feronia submarginata, Say, Trans. Am. Phil. Soc. i. p. 45 (1823). 



Piesmus submarginatus, Leconte, loc. cit. p. 303 . 

 Pcecilus monedula, Germar, Ins. Sp. Nov. p. 18 (1824). 



Hab. Noeth America, Southern States 1 .— Mexico {Salle). 



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There is one example of this species in the Salle collection, named Platysma crenata, 

 Chevr. (MS.) 



OPHEYOGASTER. 



Feronia, subgen. Ophryog 'aster, Chaudoir, Bull. Mosc. liii. 1878, p. 60. 



Two species of this genus have been described by Chaudoir — one from Mexico, and 

 the other from Ecuador. They are allied to Pachymorphus, a numerous genus peculiar 

 to extratropical South America, differing chiefly in the three terminal ventral segments 



being grooved transversely. 



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