Rev. H. Clark on the Mexican Species of Hydropori. 179 



confertissime punctatis, nigris vel fusco-nigris, ad humeros et 

 marginem testaceo notatis; pedibus rufo-fuscis. 

 Long. Corp. 2 lin., lat. 1 lin. 



Oblong-oval, subattenuated towards the apex, subdepressed ; 

 when viewed under a high power, the surface is very thickly and 

 minutely punctate; elytra punctate-striate, in colour black or 

 fuscous black marked with rufous : head finely and thickly punc- 

 tate, black, the medial anterior disk being suffused with rufous : 

 tJwrax broadly transverse, in front distinctly excavated; the 

 sides are subconstricted and very narrowly marginate; the 

 basal line is broadly and distinctly angulated in the place of the 

 scutellum; when viewed obliquely, a row of fine punctures is 

 discernible parallel to the anterior and also to the basal margins 

 (these lines of punctures in different examples vary somewhat in 

 breadth) ; in colour rufo-flavous, the anterior margin and also 

 two medial basal circular markings being black ; the margina- 

 tion is also narrowly black : elytra sufficiently robust, subde- 

 pressed, and slightly acuminate; the shoulders are somewhat 

 rounded, thus forming a distinct angle with the line of the 

 margination of the thorax ; towards the apex the surface is very 

 finely and thickly punctate, with four rows of deeper and more 

 distinctly punctate striae (that near the line of margination being 

 sometimes more obsolete) ; the colour is dark fuscous, with an 

 irregular, short, longitudinal rufous marking at the base between 

 each stria, and other irregular longitudinal markings distributed 

 throughout the surface, more distinctly near the line of margina- 

 tion ; in different examples these markings vary considerably in 

 number and degree of coloration : abdomen and underside black : 

 legs flavo-rufous ; antenna rufous, the apex being more or less 

 fuscous. 



The three examples before me of this species present some 

 variation in the form and extent of the markings on the elytra. 

 It is a very distinct and handsome species. 



San Angel and Cuernavaca, Mexico. In the collections of 

 Mr. Fry and the Rev. Hamlet Clark. 



9. H. infaustits, n. sp. 



H. oblongo-ovalis, subparallelus, antice sat obtusus, confertissime et 

 obsolete punctatus, punctato-striatus, niger ; capite brevi, inter 

 oculos undique late et obsolete depresso, punctatissimo, nigro, ad 

 medium prope basin transverse rufo notato ; thorace transverso, 

 lato, ad latera tenuiter marginato, prope basin irregulariter trans- 

 verse depresso, punctatissimo, nigro, ad medium rufo notato ; ely- 

 tris sat productis, ad apicem subacuminatis, subtiliter punctatissi- 

 mis, punctato-striatis, nigris, ad latera obsolete rufo vel fusco 



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