FOSSIL COLEOPTERA 25 



some foreign matter lying along the end of the right hind tibia 

 bears a deceptive resemblance to an extremely elongate spur, but 

 I believe the structure to be properly described above. Addi- 

 tional specimens of the insect have since been found in the collec- 

 tion of the United States National Museum, one of them display- 

 ing the left antenna. This organ is figured, and will be seen to 

 differ in no important respect from the recent forms, as far as 

 can be made out from the rather indistinctly shown articulations. 

 This is the only fossil Scaraba^id thus far kno\^^l to me in which 

 the antenna can be seen. 



M. PROPHETicus D. sp. Form generally similar to that of M. pJuto, but 

 a little more elongate. It is a considerably larger species with a relatively 

 smaller prothorax, widest about the middle, sides not at all angulate but 

 curving almost regularly to the apex and base which are subequal. The 

 elytra can barely be made out through the overlying abdomen (the specimen 

 being preserved in ventral view) which they do not cover, nearly the whole 

 of two segments being exposed beyond their apices. Middle and hind legs 

 spiny or with stout hairs. Length, 18.35 mm.; of head, 1.35 mm.; of pro- 

 thorax, 3.40 mm.; of hind femur, about 4.35 mm.; of hind tibia, the same; 

 of hind tarsus including the claws, 6.75 mm. Width of prothorax, 4.75 

 mm. ; across elytra, about 7.25 mm. 



Station number 14. Collector not specified. The type specimen comes 

 directly from Professor Cockerell, with the collection number 168, and is 

 in the Museum of the L^niversity of Colorado. 



I see no reason for doubting that this is congeneric with M. 

 pluto, which it sufficiently resembles to obviate the need of a 

 figure. The two species differ in size and in the shape of the 

 prothorax. The sculpture does not show in M. propheticus^ but 

 it was probably fine or it would be likely to leave some imprint 

 on the stone. 



DiPLOTAXis Kirhy. 



D.(?) siMPLiciPES n. sp. (Plate YI, Fig. 9.) Form moderately robust. 

 Head short, anterior outline nearly semicircular. Eye small. Prothorax 

 about twice as broad as long (measured along the median line) sides strong- 

 ly and regularly arcuate. Elytra about three and three-fourths times as 

 long as the prothorax (the latter measured as before) with the stride of 

 fine but not at all closely placed punctures, these striae becoming confluent 

 towards the apex as shown in the figure. Legs short, the front one. as 

 drawn, not entirely free from the matrix so as to appear smaller than it 

 really is, the middle and hind tibi® roughened about as in Diplotaxis, but 

 not ridged. Length, about 10.25 mm.; of elytron, 7.25 mm.; of middle 



