46 MEMOIRS ON THE COLEOPTERA 



The above species, while obviously forming a well defined sub- 

 gene'ric unit of Bembidion, are remarkably isolated among them- 

 selves, and the possession of three setigerous discal foveae in the 

 case of festivum, instead of the two characterizing all the other 

 species, as well as constituting the general rule throughout the 

 genus, shows that this character cannot be used to define separate 

 subgeneric groups in the cases of rickseckeri, or scudderi, these 

 merely forming sections of Peryphus and Notaphus respectively. 



Group VIII tigrinum 

 Sugbenus Leuchydrium nov. 



The single species of this group, described by LeConte under 

 the name tigrinum, has a very peculiar and distinctive habitus, 

 not only because of its pallid coloration, which is seen in certain 

 other forms of other families inhabiting like environments, but in 

 its parallel and very convex body, deep entire impunctate striae 

 and short thick antennae. The mentum tooth is small and very 

 obtusely rounded at tip. The tarsi are moderately long but unu- 

 sually thick. The two dorsal foveae of the elytra are obviously 

 attached to the third stria, as in the immediately preceding groups, 

 and by no means discal on the third interval as they are in the var- 

 iegatum group, to which the species was assigned by Hayward. 

 The small series in my collection I owe to the kindness of Mr. 

 Harford, who stated that they were found at night on the beaches 

 about Alameda, California. 



Group IX ustulatum 

 Subgenus Peryphus Steph. 



Eighty-one species and subspecies of this subgenus, by far the 

 largest of the Eurasiatic groups, are recorded as valid in the Euro- 

 pean list; the North American components are slightly more nu- 

 merous, forming next to the largest of our subgenera. The species 

 are characterized in common by having the prothorax always dis- 

 tinctly narrower than the elytra and usually, but not always, sub- 

 cordiform, by their long slender antennae, by having the two or 

 three dorsal foveae of the elytra on or adjoining the third stria, and 

 by having all the striae distinctly or conspicuously punctate. The 



