27 
*55. Climacocercus guerilla’, (Cass.), Pr. Phil. Mexico to 
Acad., 1848, p. 87. [Talapa, Mex.] Colombia, 
Grey-throated Harrier-Hawk. Venezuela, 
Brazil, and 
Wing 3 176, 2 185 mm. ; above blackish; Ecuador. 
tail with 3 irregular white bands; throat 
and cheeks pale grey; below dull white 
closely barred down to thighs with blackish 
narrow bands (narrower and closer thanin . 
zonothorax. 
Gen. XXI. GERANOSPIZIAS Sundev. (1873). 
Type by sub. desig. Chubb (1916) G. gractlis. 
Tarsus scaled behind ; thighs without overhanging 
tuft of feathers; ridge of bill greater than half 
length of middle toe (without claw) ; commissure 
slightly festooned. 
Size moderate (length 16.5-24-5 in.). 
56. Geranospizias caerulescens caerulescens Venezuela, 
(Vieill.), N. Dict., x., p. 318 (1817). Amer. Guiana, E. 
merid. ; type loc. subst. Brazil, Brab. and Colombia ; 
Chubb. ] W. Brazil. 
Grey Crane-Hawk. 
Wing 3 245, 2 270 mm.; plumage slaty 
blue, with little trace of white cross bars 
except on thighs and under wing-coverts ; 
tail ochraceous white with 2 broad black 
bands ; immature less blue and with belly 
ochraceous buff, but not strongly barred. 
56a. Geranospizias ca@rulescens balzarensis W. Ecuador 
Sclater, Bull. B.O.C., xxxvii., p. 44 (1918). (Guayas Prov. 
[Balzar Mins., Guayas Prov., bo in B.M.] & Punal.), 
Ecuador Crane-Hawk. Peru. 
1 In revising this group the forms jugularis and interstes appear to be untenable 
and are therefore omitted. 
