Eostern 



Hybrid 

 species 



■ Southwestern and 

 Great Basin 



Great Ploins 

 Midwestern 

 Far-western 



Central 



Fig. 88. Details of the Citlicoides voriipennis complex. Above are shown the 

 ranges of the relatively typical populations of the five subspecies. Intergrading 

 populations have been found connecting many of the adjoining peripheries. 

 Below is shown a family tree of the five subspcx'ics based on morphological 

 criteria, with an indication of the postulated general range of the ancestral 

 forms. (Based on data in Wirth and Jones.) 



