AMERICAN NEUKOPTERA. 265 



In some specimens tlio brown along radius, cubitus and anal vein 

 and beyond anastomosis is much darker than elsewhere. 



Plat.yphylax: deMiguata Walker. 



Tiiere are three forms of this species known to nie, which, for the 

 present, I consider but varieties of the one species. These three 

 f)rms are varial)le in the development of the median stripe; some- 

 times interrupted at the anastomosis, sometimes continuous; The 

 form in the Northeastern United States 1 shall consider as the typi- 

 cal P. designata; some, at least, of Walker's specimens (if not all) 

 were of this form. The typical P. designata is of moderate size, 

 and often quite dark ; the superior ap()endages of the male (seen 

 from the side) are narrowed above before tip. 



The specimens from Colorado and further west are larger, paler, 

 and in the male the superior appendages (seen from the side) are 

 not narrowed l)efore tip. This form I call P. designata var. occi- 

 dentalls. I have it from various places in Colorado, New Mexico, 

 Washington and California. 



The form from Alaska is about the size of the typical P. desig- 

 nata, but very much darker; a uniform brown, with a narrow pale 

 stripe behind radius, and the usual median stripe. In the male the 

 superior appendages (seen from the side) are slightly concave below, 

 and not narrowed before the tip ; the lower appendages are more 

 acuminate at tip than in other varieties; it may be called P. desig- 

 nata var. alaskensis. 



LEPTOCERIDJE. 



I^eptocerus recurvatus n. sp. — Black, clothed with white hairs; sides 

 of thorax brown ; antennse yellowish-browii. narrowly annulate with black, the 

 subantennal tuft yellow-brown ; legs yellowish, the fore pair darker; abdomen 

 blackish near base, pale beyond. Forewings brownish, basal anal area paler, 

 also costal area, venation dark brown, a rather blackish spot over ends of first 

 ai)ical fork, the base of the upper branch of the median brown, the rest hyaline 

 until the anastomosis, the pedicels of forks one and three about equal in length ; 

 hind wings more hyaline, the anterior venation brown, rest paler. Expanse 

 22 mm. 



From Westfield, N. Y., June, July (Woglum). 

 HYDROPSYCHID^E. 



Hy dropsy <'lic potlili n. sp. — Head brown, face and vertex clothed with 

 yellowish liair; palpi brown; anteunte pale yellow, with brown spiral mark; 

 protlionix with long yellow hairs, and tuft at base of wing; dorsum of thorax 



TKAN.'-. AM. KNT. -SOC. XXXIV. (34) SEPTEMBER, 1908. 



