23G THOMAS SAY FOUNDATION 



with white pile; a transverse depressed area just back 

 of hind ocelli; the hind ocelli about three times as close 

 to the eyes as to each other ; antennae brown ; maxillary 

 palpi very large. 



Prothorax blackish brown, distinctly longer than wide ; 

 slightly narrowed behind ; front margin rounded ; sides 

 straight, surface rugose, the rugosity black. Legs brown. 

 Middle tarsal segment short ; first tarsal segment of meso 

 and metathoracic segments longer than third. Wings uni- 

 formly subhyaline, with a reddish or rusty tinge; veins 

 brown. 



Abdomen brown. 



Male. Cerci chitinized with a small black spur at the 

 tip and a large black tooth at the base pointing upward ; 

 supra-anal plate bifid at the base and ending in a sharply 

 pointed upturned process with a knob on the lower hind 

 margin ; subanal lobes modified into enlarged membra- 

 nous processes which bear above at the base a short chiti- 

 nized tooth ; subgenital plate reaching about to the tip 

 of the cerci ; ventral lobe broadly rounded, about twice 

 as long as wide. 



Female. Unknown. 



Holotype, male, Logan, Utah (A. 0. Larsen, in Cornell 

 University Collection) . In general this species is very 

 similar to P. collaris Bks. and may prove to be the same. 

 Until bred specimens are available it may better be con- 

 sidered as a distinct form. 



Genus TAENIOPTERYX Pictet. 



1842. Taeniopteryx Pictet, Ins. Neur., p. 345. 



1861. Taeniopteryx Hagen, Syn. Neur. N. A., p. 34. 



1894. Taeniopteryx Morton, Trans. Ent. Soe. London, p. 559. 



1902. Taeniopteryx Klapalek, Termes. Fuzetek, 25:178. 



1907. Taeniopteryx Banks. Cat. Neur. Ins., p. 14. 



1909. Taeniopteryx Klapalek, Suesswasserf. Deutschl., 8:57. 



Dark brown or blackish species, mostly under 15 mm. 

 in length with very long antennae ; tarsal segments sub- 

 equal ; cerci very short. 



Head not much wider than prothorax; a depressed 

 area between the hind ocelli ; lateral tubercles large, 

 flat, polished ; occiput usually with broken longitudinal 

 dark lines ; hind ocelli at least twice as close to eyes as 

 to each other. Antennae composed of about fifty or more 

 segments. 



Prothorax wider than long, usually widened behind ; 

 sides mostly convex ; surface slightly to moderately ru- 

 gose. Legs dark ; tarsal segments subequal. Wings hya- 



