SUBFAMILY I. TRYXALIX.10. 201 



drab, giving it almost the appearance of being clothed with a 

 delicate bloom, pleases the most fastidious eve." Fox (1914, 486) 

 states that inland in New Jersey and Pennsylvania it frequents 

 dry scrubby areas, usually in sylvan surroundings, but along the 

 coast it is partial to the fringes of marsh elder, Ira frutescens L., 

 along the edge of the salt marshes. At Fern Hill, Pa., it was 

 noted as exceptionally common on serpentine barrens. 



Scudder's type of P. Itrdcliyptcm was from Princeton, Mass., 

 and Morse states that it doubtless occurs throughout New Eng- 

 land. Scudder (1900, l(i) gives its range as "Northern United 

 States east of the Rocky Mountains" ; but it is as yet not known 

 from Indiana, and west of New England has been definitely re- 

 corded only from New York, Pennsylvania, New Jersey, Michigan, 

 Iowa, Nebraska, Minnesota and eastern Wyoming. In Nebraska 

 Bruuer mentions it (1893a) as "not at all rare over the entire 

 State; most common eastward and northward." McNeill (1897, 

 210) gives its range as "Northern United States east of the Sierra 

 Nevada Mountains," and adds: "Its distribution throughout the 

 territory it inhabits is comparatively irregular. There is a gap in 

 this range extending from Illinois to New York and Pennsylvania, 

 but since it is found in New England and from Iowa to Utah, 

 there is little doubt but that its non-occurrence in the interme- 

 diate area is due to the fact of its extreme rarity." R & H. (1905) 

 erroneously recorded it, on a specimen wrongly labelled, from 

 Chokoloskee, Fla. 



Although the males of P. Itrcichyptera have well developed 

 stridulating organs the only record of their use which can be 

 found is that given by Shull (1911). He states that adults were 

 observed at Sand Point, Saginaw Bay, Mich., June 27 July 21, 

 where they occurred in open woods, patches of tall grass, and on 

 grassy sand dunes. "The males were often found in song, espe- 

 cially in the morning. They usually perched on some dead grass 

 stem, drew up the tibite against the femora like a folding pocket- 

 rule, and scraped the leg up and. down over the wing covers. The 

 rate of stridulation varied from five and a half to nine double 

 strokes (up and down) per second, and some twenty complete 

 vibrations were made in succession, followed by a period of rest 

 about half as long." 



The long-winged form, revcrsa Morse, is not rare in New 

 England, and is known from Nebraska and Michigan. The Opo- 

 mala aptera Scudder (18G9, 305) described from a single Penn- 



