22 NATURAL HISTORY BULLETIN 



placed, although the prothoracic margin is a little more produced 

 anteriorly and the transverse rows of asperities are more regular 

 than in our recent species of Xylohiops. In the characters noted, 

 our insect comes nearer to Dinoderus, and this would be the al- 

 ternate reference. It looks like a Dinoderus with the elytra of a 

 Xylohiops. The genera are fairly closely related. 



At^nius Harold. 



A. PATESCENs Scudd. (Plate VI, Figs. 4, 5.) A specimen of an Apho- 

 diide agreeing with this species in size and what can be seen of the sculp- 

 ture, exhibits the tarsal and tibial structures of the middle and hind legs 

 very well. The opportunity of figuring the distal parts of these legs seems 

 worth improving and drawings to show the tibial spurs and the proportions 

 of the tarsal joints are offered herewith, 



Aphodius Illiger. 



A. ABORiGiNALis n. sp. (Plate YI, Fig. 1.) Form stout, somewhat as in 

 the recent A. fimetarius but probably a little shorter. Head and prothoi-ax 

 distorted, practically impunctate but the head is granulate or scabrous on 

 the clypeal region. Scutellum short. Elytra with moderately strong and 

 rather wide striae which are fairly distinctly and closely but not strongly 

 punctate. Length to tip of elytra which are broken at the apices, 5.75 

 mm. ; when complete, probably 6.50 mm. 



Station number 17. One paired specimen, collected by Mrs. W. P. Cock- 

 erell. The type is in the Museum of the University of Colorado. 



This is readily known from all the other Florissant species, ex- 

 cept A. laminicola which is nearly half as large again, by its 

 greater size and wider strife, in conjunction with the almost com- 

 plete lack of cephalic and thoracic sculpture. 



A. RESTRUCTUS n. sp. (Plate \J, Fig. 2.) Form similar to that of the 

 recent A. granarius, as far as can be determined in the condition of the 

 specimen. Clypeus damaged anteriorly so that the shape of the front 

 margin is not determinable with certainty, the surface with shallow punc- 

 tures but probably not rugose. Top of head with a few scattered small 

 punctures. Prothorax narrowed anteriorly but the sides are too much dis- 

 torted to describe, the disk very sparsely and finely punctured along the 

 middle, somewhat more closely and coarsely towards the sides but without 

 any tendency to a transverse arrangement. Scutellum short. Elytra finely, 

 sharply, and not very deeply striate, the striae impunctate. Length, 3.50 

 mm. 



Station number and collector are not cited, but the specimen was taken 



