27 
*55. Climacocercus guerillat, (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 than in 
zonothorax. 
Gen. XXI. GERANOSPIZIAS Sundev. (1873). 
Type by sub. desig. Chubb (1916) G. gracilis. 
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 cerulescens Venezuela, 
(Wiel) ON: Dict, x5 p. 318 (1817). Amer. Guiana, EB: 
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 ce@rulescens balzarensis W. Ecuador 
Sclater, Bull. B.O.C., xxxviil., p. 44 (1918). (Guayas Prov. 
[Balzar Mins., Guayas Prov., typein 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. 
