1977] 
Fiance — Genera of Chloroperlidae 
315 
Cerci entirely lacking or with scattered long setae between apical 
coronas (Fig. 3-5C); pronotum with setae on posterior margin 
and usually on anterior margin as well (Fig. 3-5B); setae present 
on entire posterior margin of eighth tergite (Fig. 3-5 D); integu- 
ment gold-brown 3 
3. Inner margin of hind wing pads parallel to body axis (Fig. 3A); 
less than 6 short, coarse setae between compound eye and hind 
margin of head (Fig. 3G); abdominal tergites lightly setose; pro- 
notum having only sparse, fine setae on dorsal surface 
Hastaperla 
-. Inner margin of hind wing pads angled away from body axis 
(Fig. 4A); greater than 6 short, coarse setae between eye and 
hind margin of head (Fig. 5G); abdominal tergites heavily setose; 
pronotum with coarse, closely appressed setae on dorsal surface 
(Fig. 4-5 B) 4 
4. Dorsum of abdomen unicolorous except when adult coloration 
shows through; eighth abdominal tergite with setae absent from 
a proximal band at most 1/5 the length of the tergite (Fig. 5D) 
Sweltsa, Suwallia 
-. Dorsum of abdomen with longitudinal dark stripes in mature 
larvae; setae absent from a band comprising the proximal 1/4 
to 1/3 of the eighth tergite (Fig. 4D) Rasvena terna 
Acknowledgements 
The author would like to thank Dr. W. L. Brown, Jr., Cornell 
Univ., for his critical reading of the manuscript. The Grace Gris- 
wold Fund has generously provided funding for publication costs. 
Literature Cited 
Baumann, R. W. 
1974. What is Alloperla imbecilla (Say)? Designation of a neotype, and a 
new Alloperla from Eastern North America (Plecoptera: Chloroperli- 
dae). Proc. Biol. Soc. Washington 87: 257-264. 
Frison, T. H. 
1942. Studies of North American Plecoptera, with special reference to the 
fauna of Illinois. Bull. Illinois Nat. Hist. Surv., Urbana 22: 235-355. 
Harper, P. P. and D. Roy 
1975. Utaperla gaspesiana sp. nov., le premier Plecoptere Paraperlinae de 
Test Canadien. Can. J. Zool. 53: 1185-1187. 
