PSYCHE 
VOL. XLV 
MARCH, 1938 
No. 1 
LECTOTYPES OF NORTH AMERICAN CADDIS FLIES 
IN THE MUSEUM OF COMPARATIVE ZOOLOGY 1 
By Herbert H. Ross 
Illinois State Natural History Survey, 
Urbana, Illinois 
Few species of caddis flies described by Hagen and Banks 
have had lectotypes designated for them. In a few cases 
the type series of one species contains representatives of 
more than one species, a condition which has led to confusion 
of names due to different interpretations made by different 
authors. The only way to obviate further repetition of this 
is to place on a single type basis (by lectotype designations) 
all those species described from a series of cotypes. This 
paper sets lectotypes for 229 species, all the lectotypes being 
in the collection of the Museum of Comparative Zoology. 
The method followed in selecting the single type specimens 
has taken into account very little work done by other au- 
thors, since a large number of the species represent segre- 
gations seldom recognized by others. Furthermore both 
Hagen and Banks used a labelling system which left no doubt 
as to which specimen they considered the real type. Hagen 
placed his label on only one specimen and marked it with an 
asterisk if it were a type or plesiotype in the sense of present 
usage. Other specimens in the series were simply placed in 
1 A grant from the travel fund of the Illinois State Natural History 
S^vey , Urbana, Illinois, made it possible for me to visit the Museum 
ol Comparative Zoology and make these studies. I wish to acknowl- 
edge my gratitude and appreciation to the Survey for this grant. 
