Ridgway Diagnoses of Some New Forms of Picidas. 35 



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

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



((BdXavos, an acorn; <r<f>vpa, a hammer.) 



Species and subspecies: 



1. Balanosphyra formicivora. 



a. Balanosphyra formicivora formicivora (Swainson). 



b. Balanosphyra formicivora aculeata (Mearns). 



c. Balanosphyra formicivora bairdi (Ridgway). 



d. Balanosphyra formicivora angustifrons (Baird). 



e. Balanosphyra formicivora albeola (Todd). 



/. Balanosphyra formicivora striatipectus (Ridgway). 



2. Balanosphyra flavigula (Malherbe). 



3. Balanosphyra xantholarynx ( Reichenbach ) . 



