164 WHITE-BILLED NUT-CRACKER. 
Total length, 10 inches ; hill, from the gape, ^ ; 
wings, 5 ; tail beyond, 3 ; ffrom the base, 4 | ; tar- 
sus, 1 ; hind-toe and claw, in a straight line, T s 5 . 
Following this type, we place another exceedingly 
rare bird from Senegal, both sexes of which we 
shall now describe ; we consider it, for the present, 
as the most aberrant of the hard-hills, and therefore 
as belonging to the Tenuirostrai form ; although 
other species doubtless exist, which will be found 
more characteristic of this particular type ; it seems 
however, intermediate between the last form and 
Coccothraustes. 
BLUE-BILLED NUT-CRACKER. 
Spermoplaga cyanorynchis, Swains. 
Blackish or cinereous ; throat, breast, and flanks, crimson ; 
bill, blue tipt with orange ; female, with white spots on 
the belly. 
Loxia hffimatina, Yieittot, Ois. Chant. PI. 67 Loxia 
guttata, ib. 68. 
Although the two birds we shall now describe 
under the above name have been considered diffe- 
rent species, we strongly suspect they will turn out 
to be sexes of only one. Then- size and proportions 
are precisely the same, while the very remarkable 
colour of the bill, exactly alike in both, still further 
