27 



*55. CUmacocercus guerilla''-, (Cass.), Pr. Phil. 

 Acad., 1848, p. 87. [Talapa, Mex.] 

 Grey-throated Harrier-Hawk. 



Wing (J 176, ? 185 mm. ; abov6 blackish ; 

 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. 



Mexico to 

 Colombia, 

 Venezuela, 

 Brazil, and 

 Ecuador. 



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 ccetulescens ccerulescens 

 (Vieill.), N. Diet., x., p. 318 (1817). Amer. 

 tnerid. ; type loc. subst. Brazil, Brab. and 

 Chubb.] 

 Grey Crane-Hawk. 



Wing ^ 245, ? 270 mm. ; plumage slaty 

 blue, with httle 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 beUy 

 ochraceous buff, but not strongly barred. 



Venezuela, 

 Guiana, E. 

 Colombia ; 

 W. Brazil. 



56a. Geranospizias carulescens balzarensis' W. Ecuador 



Sclater, Bull. B.O.C., xxxviii., p. 44 (1918). (Guayas Prov. 



[Balzar Mtns., Guayas Prov., tjrpe in B.M.] & Puna I.), 



Ecuador Crane-Hawk. Peru. 



* In revising this group the forms jugularis and interstes appear to be untenable- 

 and are therefore omitted. 



