PLATE XI. 
HEBRUS AND RHAGOVELIA. 
Fic. 1. Adult female Hebrus concinnus. 
Fic. 2. Antenne of Hebrus to show the five segmented condition plus 
the small segments. 
Fic. 8. First Instar nymph of Hebrus. 
Fic. 4. Fore and hind wings of Hebrus. 
Fic 5. Female Rhagovelia obesa. 
Fics. 6 and 7. Tarsus of middle leg to show the cleft condition with 
its tuft of fringed hairs. These spread beneath the surface of the 
water, as in 7, and aid in rowing over rapid water. 
Fic. 8. One of the fringed hairs enlarged. (6, 7 and 8 from Bueno.) 
Fic. 9. Male Rhagovelia obesa. 
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