1938] North American Caddis Flies 3 
scattered countries that it has been impossible for me to 
gather the necessary information. 
The species treated are listed within each family alpha- 
betically according first to genus and then to species. Many 
of the species have been transferred from genus to genus 
several times. In attempting to find some method which 
would be easy to follow and at the same time show the 
generic placement, I am using the following double entry 
when a change has been made. If a species is placed in a 
genus other than the one in which it was described, it is 
listed both under the genus in which it was originally de- 
scribed and under the genus in which I am placing it. For 
example, Hydropsyche sordida Hagen is now placed in the 
genus Cheumatopsyche. Therefore, it is listed under both 
Hydropsyche sordida in the h’s and under Cheumatopsyche 
sordida. Under the former, note is made of the genus in 
which it is placed. 
Professor Nathan Banks, Curator of insects at the Mu- 
seum of Comparative Zoology, and Professor F. M. Carpenter 
of the Division of Biology, Harvard University, have been of 
inestimable help during the course of this work in giving 
information and advice, in placing at my disposal study facil- 
ities and equipment, and in the many courtesies accorded me 
during my visit to the Museum of Comparative Zoology. 
Dr. C. 0. Mohr, of the Illinois State Natural History Sur- 
vey, has made most of the drawings for this paper, and I 
wish to express my gratitude for this. 
Family RHYACOPHILIDiE 
Agapetus mall eat us Banks, 1914, p. 202, fig. 57. 
Lectotype, male. — Los Angeles County, California, San 
Gabriel Mts., 3000 ft., June 17, 1907, F. Grinnell, Jr. No. 
11723. Lectoallotype, female. — Same data. 
The genitalia of the lectotype are shown in fig. 1. 
Baerea? maculata Hagen. — see Protoptila maculata (Hagen) 
Glossosoma nigrior Banks. — see Mystrophora nigrior 
(Banks) 
Glossosoma parvulum Banks, 1904a, p. 108, fig. 13. 
Lectotype , male. — Pecos, New Mexico, August 10, at 
