NATHAN BANKS. 201 



SYNOPSES AND DESCRIPTIONS OF EXOTIC 

 NEUROPTERA, 



By Nathan Banks. 



Included below, with the descriptions of various new 

 genera and species, are synopses of the genera of Panos- 

 pidae, Osmylinae, Hemerobiinae, Mantispidae, South Ameri- 

 can Myrmeleonidae and a new classification of the Perlidae ; 

 most of the synoptic work is a result of a study of several 

 European collections. 



The types of all the new species described in this paper 

 are in the author's collection. 



PERLIDAE. 



Twice I have published classifications of the American 

 Perlidae. After seeing several genera (hitherto unknown 

 to me) in European museums I have prepared a new ar- 

 rangement, which, however, differs little from the others as 

 far as American species are concerned, but places in the 

 same scheme the various exotic genera. 



For the principal character I would use the shape of the 

 anterior part of the head. 



1. Clypeus practically invisible, or only projecting from beneath the 



raised margin of the front of the head ; tarsi with the last 

 joint very much longer than the first and second together, 

 the first joint barely, if any longer, than the width of the 

 tibia at tip ; coxae I widely separate ; setae present ; no 



series of cross-veins in the cubito-anal space PERLINAE. 



Clypeus visible in continuation of the general surface of the head, 

 and separated by a suture from the head ; tarsi with the last 

 joint but little or not longer than the first and second 

 together, the first joint longer than the width of the tibiae 

 at tip, last joint of palpi as large as others 2. 



2. Many cross-veins in the apical part of fore wings ; median vein not 



united to the radius near base ; setae well developed ; second 

 tarsal joint much shorter than others. ..PTERONARCINAE. 

 Few cross-veins in the apical part of the fore-wings ; median vein 

 united to the radius toward base ; first and second tarsal 

 joints together longer than the third ..NEMOURINAE. 



TRANS. AM. ENT. SOC. , XXXIX. (26) 



