1 68 MEMOIRS ON THE COLEOPTERA 



obliquely and feebly sinuate at apex, the tips each obtuse and 

 rounded; third interval with four punctures; legs rather long and 

 slender, the anterior tarsi obviously grooved. Length (9 ) 9.0 mm.; 

 width 2.7 mm. Mexico (Colonia Garcia, Sierra Madre Mts., 

 Chihuahua), C. H. T. Townsend *perlevis n. sp. 



Of the species pertaining to this genus which I do not have at 

 hand, it should be said that larvalis Lee. from the regions about 

 St. Louis, Mo., but apparently very rare has the third antennal 

 joint as long as the next two combined and caudata Lee., has the 

 alternate strial intervals of the elytra peculiarly punctate, appar- 

 ently somewhat as in Platynus hypolithus Say. Finally, myrmecodes 

 Horn, is evidently related to the small species named longipes and 

 anthicoides above, but, though the description fits either of them 

 tolerably well, the third antennal joint would hardly be recorded as 

 a little longer than the fourth in either of them; it is much longer 

 than the fourth; as the elytra are said to be nearly twice as long 

 as wide, it may be more closely allied to anthicoides than to longipes; 

 however, as the latter species are mutually widely distinct, the 

 probabilities are that neither of them will prove to be the same as 

 the Arizonian myrmecodes. It is probable that LeConte included 

 several species under his very inadequately described jejuna, and I 

 am not positive that the one above described under that name is 

 precisely conspecific; it has been in my collection under that name 

 for many years, however, and my recollection is that it was com- 

 pared with the one bearing the type label in the LeConte collection. 

 Of the Mexican species, leptodes Bates, differs from any above de- 

 scribed in having the thoracic base sinuate from angle to angle and 

 euprepes Bates, also from Durango, differs in the strong elytral 

 striae; it is about 12 mm. in length. 



Olisthopus Dej. 



It is almost impossible to believe that either Feronia parmata or 

 Olisthopus cinctus of Say, can be identical with the species that is 

 commonly known as Olisthopus parmatus Say, in our present lists, 

 and yet, if not applying to the latter, they must both be considered 

 unknown. For instance, under the description of Feronia parmata, 

 the author states that the prothorax is destitute of an elevated edge 

 and that the elytra are black-brown to the sixth stria, the margin 

 pale rufous; neither of these characters applies to our Olisthopus 



