APPENDIX II. 



13. THE REGIONAL OCCURRENCE OF THE SPECIES OF OPALINIDAE. 



There was inadvertently omitted from the body of this volume any 

 summary statement of the regional distribution of the species of 

 Opalinidae. It seems of importance, therefore, as this volume is 

 going to nal printing,' to include such statement in a brief appendix. 

 First will be given lists of the Opalinid species known from the major 

 geographical regions, and there will then be added a few paragraphs 

 of brief discussion of these lists. 



I. NORTH AMERICA. 



1, NORTHEIASTEEN NORTH AMEBICA, WEST TO THE MISSISSIPPI RIVER, SOUTH TO 



MARYLAND. 



Protoopalinae, none. 



ZeUeriellae, none. 



Cepedeae, none. 



O. chorophili (eastern United States, west to Texas). 



O. discophrya (northern and eastern Canada). 



O. hylaxena (over the whole area). 



0. hylaxena form orbiculata (Slassachusetts). 



0. hylaxena form parvinucleata (Massachusetts). 



O. kennicotti (northern Illinois). 



0. [larvarum'] (Nova Scotia). 



0. obtrigonoidea (over the whole area and southwestward into the Sonoran 

 region ) . 



O. obtrigonoidea americana (Ohio, North Carolina). 



0. teirae-mariae (Marj-land). 



0. pickeringii (District of Columbia to North Carolina, west to Ohio and the 

 Selkirks). 



0. species ?, from Rana septentrionalis (Ontario). 



2, SOUTHEASTERN UNITED STATES, NORTH TO MARYLAND, WEST TO THE MISSISSIPPI 



RIVER. 



Protoopalinae, none. 



Zelleriella scaphiopndos (North Carolina). 



Cepedea (?) flava (probably southeastern United States). 



C. floridensis (Key West, Florida). 



C. obovoidea (Florida). 



Opalina carolinensis (District of Columbia, south to Florida, west to Ohio 

 and Texas). 



0. chorophili (eastern United States, west to Texas). 



0. hylaxena form georgiana (Georgia). 



0. obtrigonoidea (Massachusetts to Georgia and west to Arizona and Mexico). 



O. obtrigonoidea lata (Florida, Oregon). 



O. obtrigonoidea orbiculata (Maryland to Florida, west to Texas). 



O. pickeringii (District of Columbia to North Carolina, west to Ohio and the 

 Selkirks). 



