490 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



ANTHICIDAE. 



LITHOMACRATRIA, gen. nov. 



Form similar to Corphyra. Antennae, in general, of the type seen 

 in the modern genus Macratria but more highly differentiated, the 

 distal three joints much longer than all of the remainder, slightly in- 

 crassate. Prothorax short, transverse, not elongate as in Macratria. I 



Type. L. mirabilis, sp. nov. 



LITHOMACRATRIA MIRABILIS, sp. nov. 

 Plate 16, fig. 1-2. 



Form moderately stout. Head not enlarged, tempora rounded, 

 surface nearly smooth but with a visible alutaceous sculpture. Pal- 

 pus, probably maxillary, enlarged apically. Antennae moderately 

 long, reaching, in life, about to the base of the elytra, joints two toj 

 eight short, subequal, not serrate, ninth and tenth each about equal 

 to the sixth, seventh, and eighth united, eleventh more than four 

 fifths as long as the combined ninth and tenth, these distal three 

 joints only a little broader than the others. Prothorax about as long 

 as the head, sculpture minute. Elytra about three and one half times 

 as long as the prothorax, finely punctulate and moderately closely I 

 clothed with brownish hairs which do not at all conceal the surface. 

 Abdomen alutaceous. Legs not very well preserved, fairly slender. 

 Length, as preserved, 7.30 mm.; of elytron, 4.60 mm. 



Described from one specimen with counterpart. 



Type. No. 2,694, 2,695 M. C. Z. Florissant, Col. (No. 11,257 

 and 13,655 S. H. Scudder Coll.). 



My idea is that this fossil should belong near Macratria, but the 

 basis for this opinion rests mostly upon the type of antennal structure. 

 The aspect is decidedly more that of Corphyra and the size also corre- j 

 sponds better with the latter genus. It seems, by description, toj 

 differ from M . gigantea in being smaller and having a different protho- 

 rax and antennae, but the type of M. gigantea is not now at hand for' 

 comparison. 



