206 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



tions made by the present study bring the total of the named species 

 to 60. It is notable that as many as 57 of tliis number are known to 

 occur in the area defined above. Western North America is thus a 

 veritable treasure house of the Hemerobiidae, and it seems likely 

 that further exploration may bring to light more new species, especially 

 of Sympherobius, which obviously is collected inadequately, and of 

 Kimminsia, which seems exceptionally rich in the area. 



My cordial thanks are due to Dr. Charles P. Alexander and Dr. 

 Marion E. Smith for their kindness in submitting the Alexander 

 collection to me for study. The major part of this collection has been 

 returned to the Entomological Department, University of Massa- 

 chusetts, Amherst, Mass., except the type specimens, which have 

 been sent to the United States National Museum at the suggestion of 

 Dr. Alexander. The examination of the United States National 

 Museum material was made possible tlirough the kindness of Dr. 

 Oliver S. Flint, Jr., and Dr. Ashley B. Gurney, to whom I wish to 

 express my sincere appreciation. The whole of this material has been 

 returned to the Museum. 



Family Hemerobiidae 



Subfamily Hemerobiinae ^ 



Genus Sympherobius Banks 



Sympherobius Banks, Proc. Ent. Soc. Washington, vol. 6, p. 209, 1904. 



The material before me contains ten species of this genus, including 

 two that are new, while the following six species previously recorded 

 are missing: S. umbratus Banks, S. arizonicus Banks, S. pictus 

 (Banks), S. limbus Carpenter, ^S. similis Carpenter, and S. distinctus 

 Carpenter, Most of these six species are known only from a unique 

 type or at most from a few specimens. 



Sympherobius californicus Banks 



Sympherobius californicus Banks, Trans. Amer. Ent. Soc, vol. 37, p. 346, 1911. 



California: Alameda Co., Marin Co., San Jose, Benicia [USNM]. 

 *Oregon: in Blue Mts. [USNM]. 



Sympherobius bifasciatus Banks 



Sympherobius bifasciatus Banks, Trans. Araer. Ent. Soc, vol. 37, p. 347, 1911. 



*Utah: Logan [USNM]. 



1 According to my studies on genitalia characters (1960), the family Hemero- 

 biidae is divisible into two subfamilies, Hemerobiinae and Notiobiellinae, with all 

 the Nearctic genera belonging to the former subfamily. 



