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



2. Oblongi. 



12. H. Magensis, n. sp. 



H. sat robustus, subpubescens ; thorace ad basin transverse depresso, 



nigro, antice flavo ; elytris punctato-striatis. 

 Long. corp. 1^ lin., lat. \ lin. 



Ovate, broad, sufficiently robust, very finely and sparingly 

 pubescent : head transverse, impunctate, glabrous ; below the 

 inner margin of the eyes on either side is a minute fovea, and 

 parallel to the line of the base is a minute longitudinal depres- 

 sion ; in colour black : thorax somewhat narrow, transverse ; on 

 either side is a distinct, longitudinal, somewhat oblique fovea, 

 extending from the middle to the line of the base ; the surface 

 is thickly punctate ; when viewed obliquely, a transverse shallow 

 depression may be discerned near the middle, and also a minute 

 punctured fovea near to the anterior margin ; in colour black, 

 the anterior margin and sides being distinctly suffused with 

 flavous : elytra broad, robust, very finely pubescent ; beneath 

 this pubescence are distinct punctures, and also a faintly punc- 

 tate stria ; at the anterior margin, halfway between the suture 

 and the lateral angles, is a short depressed fovea, corresponding 

 in position with the fovea on the thorax ; in colour a deep brown 

 black : abdomen and underside black : legs rufous : antennae rufo- 

 fuscous. 



A single example of this species is in my collection, received 

 some years ago through Mr. S. Stevens. Locality " Mexico." 



13. H. Charlottii, n. sp. 



H. ovatus, subelongatus, punctatus, flavo-ferrugineus ; elytris rufo- 

 flavis, lineis obscuris tribus aut quatuor fuscis ; antennis rufo- 

 testaceis. 



Long. corp. 1 lin., lat. ^ lin. 



Ovate, subparallel, punctate, glabrous, of a flavo-ferruginous 

 colour : head broad, in colour rufo-flavous : thorax broad ; the 

 sides are somewhat rounded in form and constricted towards the 

 front; the anterior margin is straight; the surface is thickly 

 and obsoletely punctate ; on either side of the middle, near 

 the line of the base, are two short and distinct fovese extending 

 halfway to the anterior margin ; the surface is glabrous, and in 

 colour fiavo-ferruginous : elytra sufficiently broad, slightly con- 

 stricted in front, the margins near the base forming an oblique 

 angle with the line of the thorax ; the surface is thickly and 

 obsoletely punctate ; near the basal line, immediately opposite 

 the thoracic fovea, is a short longitudinal depression, broader and 

 less distinctly defined than the fovea of the thorax ; in colour rufo- 



