FOSSIL COLEOPTEEA 9 



quite contiguous, metasternuin carinate along the median line. Length. 

 3.00 mm. 



The size and form are those of some of our common species of 

 Crenipliilus, but the characters specified above seem to warrant 

 the formation of a new genus for the reception of the fossil. 



Hydxobius Sch m idf. 



H. TIBIALIS n. sp. (Plate II, Figs. 6, 7.) Form moderately elongate. 

 Head large, probablv exaggerated in apparent size on account of abnormal 

 extrusion. Antennfe with most of the basal portion concealed but showing 

 the distal seven joints, the last five of which form a club. The basal club- 

 joint (probably the seventh antennal joint) is longer than the one succeed- 

 ing but smaller than the presumed ninth. The terminal three joints form 

 by far the largest part of the club. The prothorax is shown from beneath, 

 partly in side view, the coxae large, globular or nearly so, angulate externally. 

 Middle coxae oblique. Elytra showing only one outer edge, with a small 

 portion of the disk, sculpture scarcely evident except some slight traces of 

 striation. Legs rather short and stout, the tibiae all carinate externally, 

 the number of caringe apparently three. Middle and hind tarsi five- jointed. 

 Length. 3.60 mm. 



This seems to go into the genus Hydnohius without violating 

 any of the essential characters and agrees especially in the struc- 

 ture of the antenna and tarsi. The tibiae of the recent H. 

 matthcwsi and H. Jafidcns show the same carinate effect as those 

 of the fossil. Modern forms of Hydnohius are known from 

 Europe and from both the Atlantic and Pacific slopes of North 

 America. 



Atheta Thorns. 



A. (?) FLORISSANTEXSIS n. sp. (Plate III. Fig. 1.) Form rather broad 

 for the genus, probably exaggerated by flattening. Head, in outline, round- 

 ed, eye small, oval. Antenna distinctly clavate. the apical joints much 

 broader than the basal, but the articulations are not well defined. If direct- 

 ed backwards, the antenna would slightly pass the thoracic base. Pro- 

 thorax broad, narrowed anteriorly. Elytra a little longer than the head and 

 prothorax together, truncate at tip. Abdomen gently tapering, obtuse at 

 apex. Legs wanting. Length, over aU, 2.50 mm. 



All of the Staphylinids described by Scudder are much larger 

 than this one. I include it in Atheta merely for convenience. It 

 is not strictly identifiable generically on account of the loss of 

 the legs, but may be presumed to go into the same group of 



