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. 
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 to 
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 ciosely 
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. Seudder 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- - 
sponds better with the latter genus. It seems, by description, to 
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. 
