Ridgvxiy — Diagnoses of Some New Forms of Picidse. 35 



as fifth, and tenth (outermost) relatively much smaller (only about one- 

 fourth as long as ninth), narrower, and more accumulate. 



(paXavos, an acorn; <r<pvpa, a hammer.) 



Species and subspecies: 



1 . Ba la n osphyra formicivora . 



a. Balanosphyra formicivora formicivora ( Swainson ) . 



b. Balanosphyra formicivora aculeata (Mearns). 



c. Balanosphyra formicivora bairdi (Ridgway). 



d. Balanosphyra formicivora angnstifrons (Baird). 



e. Balanosphyra formicivora albeola (Todd). 



/. Balanosphyra formicivora striatipectus (Ridgway). 



2. Balanosphyra flavigula (Malherbe). 



3. Balanosphyra xantholarynx (Reichenbach). 



