82 MEMOIRS ON THE COLEOPTERA 



fovea is missing. These instances of missing dorsal foveae are, how- 

 ever, rather rare. 



The species described above under the name vulsum, is probably 

 allied to planum Hald. (guexi Chd.), but has the sixth elytral stria, 

 not evident basally and obliterated posteriorly as intimated of that 

 species, but having the form of a very fine subobsolete line, entire 

 and equal throughout, and the elytra are not black but pale cas- 

 taneous. Planum Hald. (1843), is not preoccupied by planum 

 Schil. (1846), as represented by Chaudoirand repeated by Hayward. 

 Champlaini is probably allied to fugax Lee., described as from Illi- 

 nois, but differs in being as convex as tetracolum Say, and its degree 

 of depression could not be compared in any way with that of pla- 

 natum, as stated by LeConte of fugax. In the latter species, also, 

 the seventh stria is said to be obliterated behind the middle; in 

 champlaini it is wholly wanting. Planipenne Lee., from Lake Su- 

 perior, is said to be a synonym of fugax by Hayward, but as the 

 sixth and seventh striae are obliterated, it must be much more 

 closely related to vulsum or to planum Hald.; both planipenne and 

 planum differ from vulsum rather conspicuously in coloration, so 

 far as can be decided by my very limited material. 



Bembidium lugubre of LeConte, together with the two subspecies 

 defined in the table, might all be regarded as varieties and subspecies 

 of the Mexican mexicanum Dej., a type pervading nearly all the So- 

 noran faunas of North America; sallei Bates is, however, a distinct 

 species, in no way very closely allied to mexicanum, and in fact Mr. 

 Bates confused many species and valid subspecies under his con- 

 ception of mexicanum, with little or no attempt at legitimate dis- 

 crimination. Pernotum is widely distinct from sallei in size and 

 form of the prothorax, in strial punctuation and in many other 

 features, being one of the more isolated species of this section of the 

 subgenus. All the forms above described as allied to transfer sale, 

 united without color of propriety by Mr. Hayward, are valid spe- 

 cies, as shown by often extended series in my collection. Ochthedro- 

 mus compar Lee., of this section is simply the catalogue name of a 

 supposed variety of transversale; nothing further can be said con- 

 cerning it at present. 



The species described by Hayward as brevistriatum might seem 

 to belong properly to the nigrum section, and not widely separated 



