44 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



have been seen. It has not been recorded from ISIexico or Central 

 America. This species is quite distinct from any other, only iianus 

 being simihir; it is distinguished from nanus by its pale color and 

 narrow, depressed form. 



T. scltulm Erichson (1839) is said by European workers to be 

 the same as T. macroptetms Stephens (1832). If Horn's identifica- 

 tion is correct, then nMcropterus also may be a synonym of T. nitidu' 

 Ins (Fabricius). 



TACHYPORUS NANUS Erichson 



1840. Tachyporus nanus Erichson, Genera et species staphylinorum. . . , p- 



240. 

 1877. Tachijporus nanus Erichson, Horn, Trans. Amer. Ent. See, vol. 6, p. 105. 



Form rather parallel, convex. Black; antennae, trophi, narrow 

 basal margin of pronotum, apical third of elytra, legs, and apical 

 margins of abdominal segments rufotestaceous. Antennal segments 

 gradually expanding from the third, but all longer than wide, ter- 

 minal just less than twice as long as the tenth. Third segment of 

 maxillary palpi moderately expanded, fourth acicular. Pronotum 

 with sides regularly arcuate; not distinctly wider than elytra. 

 Elytra very indistinctly and not very densely submuricately punc- 

 tured ; with -sutural row of large muricate punctures ; lateral series 

 with four punctures. Abdomen above less distinctly punctured, 

 the punctures excavated behind, beneath with the excavations long 

 and anastomosing to form ridges between the adjacent punctures. 

 Eighth tergite of male evenly rounded; eighth sternite notched, the 

 notch small, as deep as wide, the apex narrowly rounded. Eighth 

 tergite of female 4-lobed, the median pair narrower, separated 

 almost to base; eighth sternite broadly rounded and with a con- 

 tinuous series of silken hairs. 



Type locality. — Pennsylvania. 



Localitus represented. — Michigan, District of Columbia, Pennsyl- 

 vania. 



Remarlcs. — A specimen of tliis species from Michigan in the 

 LeConte collection in the Museum of Comparative Zoology, at 

 Cambridge, Mass., bears a lectotype label with the number 7350! 



TACHYPORUS RULOMUS, new species 



Form robust and moderately convex. Ruf opiceous ; basal segment 

 of antemiae, trophi, head beneath, prothorax, and legs testaceous. 

 Antennae with segments all longer than broad, eleventh barely one- 

 half longer than tenth. Third segment of maxillary palpi feebly 

 enlarged, fourth acicular. Pronotum with sides straight in apical 

 third; not wider than elytra. Elytra very finely and irregularly 

 submuricately punctured, the punctures frequently arranged in 



