Sympotthastia update 



47 



il IS V J 



Fig. 5. S. zavreli from North Carolina, larval head. 



Fig. 6. S. cf.fulva from Alaska, larval head. 



basin) nr. Sagwon, 69°09'N 148°50'W, 7 July 1976. 4th stadium larva. 



Ecology. — This specimen was drift-netted in an arctic creek with 

 abundant orthoclads, simuliids and baetids. The following parameters 

 were noted for this creek a few years earlier: June - Sept. 1972, temp, to 

 11°C, conductance very low, pH circumneutral, alkalinity 12-18mg/l, 

 discharge l-1.5m 3 /s (Nauman and Kernodle 1973). 



Sympotthastia zavreli Pagast 

 Syndiamesa sp. Thienemann, 1934, in the keys of Johannsen (1937) and 



Roback(1957). 

 Sympotthastia zavreli Pagast, 1947: 458-459 and 510-512 (description of 



