78 



humeral portiou of the elytra 1.6""" ; of same at the middle of the elytra 

 2.06"'"; length of the elytra 2.8""", of fore femora .96"^™; breadth of 

 same .24"™; length of hind femora (?) .92-""; breadth of same .36"""; dis- 

 tance apart of the elytral strise .11""". 



2. LaccopJiilus sp. — A fragment of a leg found by Professor Denton in 

 Fogsil Canon, White Eiver, must be referred to this genus. It repre- 

 sents the hind femur and tibia of a species allied to L. maeulosus Germ., 

 but is so uncharacteristic a fragment that it is not worthy of further 

 mention. 



3. Fhilhydrus primcevus. — A single specimen, wanting head, thorax, 

 and legs, but exhibiting at once the upper and under surface of the 

 body, (like specimens mounted after a potash bath,) was found by Mr. 

 r. C. A. Eichardson, five miles west of the Green Eiver on the line of 

 the Union Pacific Eailroad, in Wyoming. The elytra taper on the 

 apical third, following the narrowing form of the abdomen, and are del- 

 icately pointed ; they are furnisbed each with six straight equidistant 

 rows of distinct fengitudinal punctate strite, 0,19""" distant from one 

 another. 



Length of elytra, 3.8"'"; breadth of same, 1.35"™. 



4. Staphylinites ohsoletum. — A single specimen was obtained by Mr. 

 Eichardson in the Green Eiver bed at the same locality as the preced- 

 ing. It is too poorly preserved to determine, until further material is 

 obtained, to what genus of Staphylinidse it' should be referred. Follow- 

 ing, therefore, the lead of Professor Oswald Heer in similar cases, it is 

 referred to a provisional genus Staphylinites. The head, thorax, 

 and abdomen are of equal breadth; the eyes are round and rather 

 large ; the posterior border of the pronotum is well rounded ; the elytra 

 are simple, about twice as long as broad, truncate and very broadly 

 rounded, with a large roundish, very dark spot occupying the whole of 

 the tip. 



Length of fragment, 3.25"" ; breadth of same, 1.25""; diameter of 

 eyes, .45"" ; length of elytra, 1.25"". 



5. GyropJuvna saxicola. — A single specimen of a species allied to G. 

 vimda Er. was found by Professor Denton in Chagrin Valley, White 

 Eiver. The head is well rounded, with large round eyes and a rounded 

 labrum. The prothoras is but vaguely defined on the stone, and is ap- 

 parently of about equal breadth with the head, and shorter than broad. 

 The elytra are of equal length and breadth, each with a pair of longitu- 

 dinal, straight, delicate raised lines. There is no sculpturing of the sur- 

 face ; no wings can be seen, nor legs, and the indistincly preserved ab- 

 domen is shaped as in G. vinula. 



Length of body, 1.84"". 



6. Leistotroplms patriarcMcus. — A single greatly-crushed and ill-de- 

 fined specimen was obtained by Professor Denton at one of the localities 

 explored by him on the White Eiver near its junction with the Green. 



.Above, the head is broader than long, the front very broadly and regu- 

 larly rounded, the jaws projecting triangularly beyond it; the eyes are 

 large, nearly as long as the head and just as long as the width of the 

 space between them ; the whole head is minutely and uniformly granu- 

 late. The collar, which is not granulate, is of the same width as the 

 part of the head between the eyes, and about half as long as the head ; 

 on one side of, and in direct connection with this are some crushed frag- 

 ments, apparently of one of the fore coxse and femora, which distort its 

 appearance. The prothorax is of about the size of the head, quadrate, 

 with rounded corners and a slight elevated rim, without punctures or 

 granulations. The elytra are very short, broader than long, quadrate. 



