PLECOPTERA OF NORTH AMERICA 151 



Isoperla bellona Banks. 



(Plate 26, figs. 1, 2, 3.) 

 1911. Isoperla bellona Banks, Trans. Am. Ent. Soc, 37:336. 



Length to tip of wings, male, 9-10 mm.; female, 11-12 

 mm. Expanse, male, 16-18 mm.; female, 19-22 mm. 



General color pale yellow to brownish, the wings with 

 a greenish yellow tinge. 



Head wider than prothorax ; yellow, usually with a dark 

 spot in the ocellar triangle, sometimes with a dark V- 

 sharped mark connecting the ocelli ; clypeus a little dark- 

 er; hind ocelli closer to the eyes than to each other. An- 

 tennae brown. 



Prothorax much wider than long; a little narrowed be- 

 hind ; sides straight ; angles narrowly rounded ; yellowish 

 with brown rugosities. Legs brown, tarsi darker. Wings 

 with a greenish yellow tinge; subcosta ends before the 

 cord ; several costal crossveins before the end of subcosta 

 and one or two beyond ; no cubital crossveins in hind 

 wing. 



Abdomen and tails yellowish. 



Male. Ninth abdominal sternite much produced and 

 evenly rounded behind ; eighth sternite with a rather 

 narrow transverse knob ; subanal lobes slender, sharp, re- 

 curved upon the tenth tergite ; no supra-anal lobe present. 

 Female. Subgenital plate of eighth abdominal sternite 

 somewhat produced and evenly rounded. 



Type, female, No. 11334, Black Mts.. N. C, May (Banks 

 Coll. Mus. Comp. Zool., Cambridge, Mass.). 

 Distribution. — 



North Carolina, Black Mts., June, 1912 (Beuten- 



miiller) . 

 Georgia. Burton, May 21, 1911, 1,800 ft., Black 

 Rock Mt., Rabun Co., May 20-25, 1911; Clay- 

 ton, May 18-26, 1911 (J. C. Bradley) ; Tallu- 

 lah Falls, June 19-25, 1909 (J. C. Bradley) ; 

 Tallulah Falls, August 1909. 



Isoperla 5-punctata Banks. 



(Plate 26, figs. 7, 8, 11.) 

 1902. Chloroperla 5-punctata Banks, Can. Ent., 34:124. 

 1907. Isoperla 5-punctata Banks, Cat. Neurop., p. 13. 



Length to tip of wings, male, 9-12 mm. ; female, 12-15 

 mm. Expanse, male, 15-19 mm. ; female, 20-26 mm. 



Length to tip of wings in short winged males, 6 mm. 



General color yellowish brown with greenish wings. 

 Head yellowish with dark marks around the ocelli and 

 often with a black streak from the hind ocelli to the lat- 



