AMERICAN COLEOPTERA. 97 



T. scrutator, Horn. — Pale piceo-testaceous, shining. Head black, very 

 finely alutaceous. Thorax testaceous, smooth, sliining, apical region somewhat 

 darker in color. Elytra piceo-testaceous, smooth, shining. Abdomen similar 

 in color, apical margins of segments paler, surface smooth, without sculpture, 

 beneath as above. Legs testaceous. Antennoe piceous, two basal joints paler. 

 Length .14 inch; 3.5 mm, 



Male. — Last ventral as in tachj/poroide.s, sixth ventral deeply emarginate at 

 middle, on each side sinuate, spinules arranged in three groups, one at each 

 end of the etnargination, the other at its bottom. Last dorsal as in tachy- 

 por aides, (fig. l.'i). 



Female. — Unknown. 



The color as above de.«cribed accords with that given by Melsheiiuer, 

 (7". (Uacouleus II Mcls. Proc. Acad. 1844. p. 32), but is probably sub- 

 ject to variatiou aud may become more or less piceous. The size given 

 is smaller than .Melsheimer's. and there may even be some doubt as to 

 the correctness of the identitication, but I can find no species to which 

 the description can be better applied. This species has been placed in 

 Leucoparyphus in all recent publications, but the anterior tarsi of the 

 male are dilated and the mesosternum not carinate. 



One male, Illinois. 



T. luiinus, n. sp. — Piceous shining, sides of thorax somewhat paler. Head 

 and thorax very minutely punctulate and scarcely perceptibly alutaceous. 

 Elytra as broad as long, distinctly alutaceous. Abdomen above and beneath 

 rather densely punctulate, finely pubescent, subopaque. Legs rufo-piceous, 

 tarsi paler. Antennae long, black, two basal joints paler. Length .16 inch; 

 4 mm. 



Male. — Last ventral deeply and acutely notched as in angusiaius, sixth ven- 

 tral very deeply emarginate, prolonged on each side of the emargination, and 

 laterallj' with a sinuation, spinules arranged on the tips of the prolongation; 

 lower face of segment distinctly concave with a granular space distant from 

 the margin in form of a hoof. Last dorsal quadridentate, the middle teeth 

 somewhat longer, (fig. 14, a). ^ 



Female. — Last ventral with the middle processes united, forming one obtuse 

 lobe, lateral processes slender. Last dorsal with the middle lobe dcejily bifurcate, 

 shorter than the outer lobes, the latter broader, as in scmirufus, (fig. 14, b). 



Two specimens from Oregon have been given me by 3Ir. H. Ulke, 

 another pair remains in his cabinet. 



T. addendum, n. sp. — Piceous, shining, sides of thorax and elytra paler, 

 legs testaceous. Head black, shining, extremely finely alutaceous and minutely 

 punctulate. Antennae black, four basal joints piceo-testaceous. Thorax piceous, 

 sides and base paler, sparsely finely punctulate. Elytra piceous, humeral space 

 and narrow margin at the sides paler, rather coarsely punctulate. Abdomen 

 piceous, posterior margins of segments paler, surface sparsely finely punctulate. 

 Body beneath piceous, abdomen spujsely jiunctulate. Legs rufo-testaceous. 

 Length .16 inch; 4 mm. 



Male. — Sixth ventral very deeply and suddenly emarginate, the angles of the 

 emargination prolonged, obtuse and spiuulose, face of segment iznpressed, with 



TRASS. AMEK. K.NT. SOC. VI. (14) JUNE, 1877. 



