34 Ridgway Diagnoses of Some New Forms of Picidse. 



Phlceotomus pileatus picinus Bangs. Canadian and Transition life- 

 zones of northwest coast, from British Columbia to the southern Sierra 

 Nevada. 



Scapaneus guatemalensis nelsoni subsp. nov. 



Type from El Silicon, Guerrero, s. w. Mexico. No. 185,526, U. S. 

 Nat. Mus. (Biological Survey Coll. ) Adult male. May 8, 1903, Nelson 

 and Goldman. 



Similar to S. g. guatemalensis but decidedly smaller, black of upper 

 parts, neck and chest less sooty (that of foreneck glossy, slightly bluish, 

 that of chest more extended) ; back stripes whiter (less yellowish) ; lighter 

 bars 011 under parts of body paler and narrower; yellow on under side of 

 wings paler. Adult male (type) : Wing, 177; tail, 96; exposed culmen, 

 42.5; tarsus, 32; outer anterior toe, 24. 



The several geographic forms of this species (as I am able to make them 

 out), with their respective ranges are as follows: 



Scapaneus guatemalensis guatemalensis (Hartlaub). States of Oaxaca, 

 Tabasco, and Yucatan, southern Mexico to Costa Rica. 



Scapaneus guatemalensis regius ( Reichenbach) . Middle-eastern Mexico, 

 in States of Tamaulipas, San Luis Potosi, and Vera Crux. 



Scapaneus guatemalensis nelsoni Ridgway. Southwestern Mexico, in 

 States of Sinaloa, Jalisco, Colima, and Guerrero and Territory of Tepic. 



Picumnus olivaceus panamensis subsp. nov. 



Type from Lion Hill Station, Panama Railway, eastern Panama. No. 

 53,959, U. S. Nat. Mus. Adult male. J. McLeannan. 



Similar to P. o. granadensis but smaller, coloration decidedly more 

 brownish olive, pileum much duller black, and feathers of malar region 

 and chin more narrowly margined with black or with these markings 

 sometimes obsolete. Adult male (type): wing, 50; tail, 24; exposed cul- 

 men, 12; tarsus, 12.5; outer anterior toe, 10.5. 



The following seem to me to be well-defined geographic forms of this 

 species : 



Picumnus olivaceus olivaceus ( Laf resnaye ) . Central Colombia. 

 Picumnus olivaceus granadensis (Lafresnaye). Western Colombia. 

 Picumnus olivaceus panamensis Ridgway. Eastern Panama. 

 Picumnus olivaceus Jlavotinctus Ridgway. Western Panama and 



Southwestern Costa Rica. 



Picumnus olivaceus dimotus Bangs. Caribbean slope, Nicaragua and 

 Honduras. 



Balanosphyra gen. nov. (Picidse). 



Type. Picus formicivorus Swainson. 



Medium sized Picidse similar to Melanerpes but with antrorse pref rontal 

 feathers ( ' ' nasal tufts ' ' ) developed into conspicuous dense tufts ; feathers 

 of breast broad, imbricated, and firm; eighth, seventh and eighth, or 

 sixth, seventh and eighth primaries longest; ninth primary nearly as long 



