SECTION II 

 SPECIES LIST AND RANGES 



In this section two new species, Optiosevvus ozarkensis and 0. 

 sandersoni, are described by Joe Edward Collier. He submitted his Ph. D. 

 thesis (Collier, 1969) to the Graduate School of the University of 

 Minnesota in August, 1969 but died of cancer that same month. His Major 

 Professor, Dr. Edwin F. Cook, has authorized publication here of 

 Collier's descriptions as a means of validating Collier's authorship of 

 these two species. The descriptions presented here are taken from 

 Collier's thesis and authorship is to be ascribed solely to Joe Edward 

 Collier. 



Family CHELONARIIDAE (Lacordaire, 1854) 



Genus Chelonarium Fabricius, 1801 



Chelonariim leaontei Thomson, 1867. Though probably not really aquatic, 

 larvae in damp moss may be washed into streams; adults usually on 

 vegetation or taken at lights in southeastern states from Florida 

 to North Carolina, Tennessee, and Alabama. 



Family ELMIDAE (ELMINTHIDAE) (Westwood, 1838) 



Tribe Larini 



Genus Lara LeConte, 1852 



Lara avara avara LeConte, 1852. Rapid, clear mountain and foothill 



streams from British Columbia to southern California and eastward 

 through Idaho and Utah to Wyoming and Colorado. Larvae on sub- 

 merged wood and debris; adults usually on logs just above churning 

 or rushing water, either beneath or on the downstream side of the 

 log. 



Lara avara amplipennis Darlington, 1929. Habitat as above from 

 British Coliombia and Washington. 



Lara gehringi Darlington, 1929. Habitat as for L. avara from 

 Washington south to central California. 



Genus Phanoaerus Sharp, 1882 



Phanoaerus olavioomis Sharp, 1882. Rapids and riffles from Central 



America and Mexico northward to Val Verde Co., Texas (known in the 

 United States from Devil's River and San Felipe Creek in Del Rio). 

 Larvae typically on submerged plant material; adults just above or 

 just below water line on objects protruding from water in rapids or 

 small falls. 



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