48 Jan S. Doughman 



male with Figs. 12-15 and description of pupa); Serra-Tosio, 1968: 

 130-134 (redescription of male, Pl.III hypopygium); Serra-Tosio, 

 1971:268-274 (description of male, P1.122 hypopygium and Pl.123.1 

 SVo; description of female, PI. 124 caudal section, wing, and antenna; 

 description of pupa, Pis. 125-126 abdominal segments); Pinder, 1978:44 

 (key and Fig. 95B of hypopygium). 



Larva (4th stadium, N=2). — Fig. 5. Head brownish-yellow. Ven- 

 tromentum smoky in color. VmP clear, teardrop shaped. Antennal AR 

 2.2-2.5; ALAW 4-5. Antenna to mandible 6:10. Labral S-setae all strong 

 spines. SI subequal to SII; SIII hairlike. LL two nondenticulate plates. 

 Premandible short and darkened distally with 2-3 inconspicuous lateral 

 teeth. Mandible normal with each of the four lateral teeth appearing as 

 individual outgrowths. Si with 12-17 nearly smooth branches. Body 

 about 11 mm. Color brownish. Procercal H/W= 1.0 and AS 2X longer 

 than supraanals. TA rounded or pointed distally and nearly half the 

 parapod length. 



Material. — USA: North Carolina, Durham Co., simipermanent 

 tributary to Little R.; Wake Co., trib. to Swift Creek. Several 4th sta- 

 dium larvae. Both stations were sampled 5 Feb. 1980. Moore Co., Deep 

 Creek (Lumber R. basin) 9 Feb. 1982. One larva. All leg. D. Lenat; 

 collection N.C. Department of Natural Resources and Community 

 Development. 



Remarks. — These Carolina specimens obviously do not belong to 

 the fulva-gp. by diagnosis since this species has ventromental plates. 

 Although unassociated, they fit no known species description but that 

 of S. zavreli (cf. Thienemann 1952). 



Ecology. — The Carolina specimens were found with Paraphaeno- 

 cladius and Eukiefferiella (b.s.) in small Piedmont streams with sand and 

 gravel substrate and slow current. Thienemann (1952) stated that zavreli 

 was found in shallow, unshaded trout streams having slow current, 

 spring runs, and meadow ditches, and that diatoms were prevalent in 

 guts. These new Nearctic finds had consumed mostly Synedra and 

 Gomphonema. 



Sympotthastia diastena (Sublette) comb. n. 



Pseudodiamesa (P.) diastena Sublette, 1964:128, orig. design. (Fig. 7b,c 

 of male hypopygium and description of allotype). 



P. diastena Sublette, Serra-Tosio, 1976:135 (stated placement ques- 

 tionable. 



Sympotthastia diastena (Sublette), Dr. D. Hansen in 1973 determined 

 two slide mounted males. 

 Male (N=2).— Figs. 1-3. The holotype was decidedly smaller than 



the following described specimens (measurements of holotype in paren- 



