84-0 NATHAN BANKS. 



SERICOSTOM ATID^ . 



Spurs 1-4-4 Nosopus. 



Spurs 2-4-4 2. 



Spurs 2-2-4 1. 



Spurs 2-2-2 Dasjpstoma. 



Spurs 2-3-3 Brachyceiilrus. 



1. — Discoidal cell iu hiud wing open Sericoisifoiiia. 



Discoidal cell in hind wing closed Notidobia. 



2. — Basal joint of antenna longer than the head 3. 



Basal joint of antenna about as long as head Helicopsyclie. 



3. — End of abdomen suddenly dilated Spliiiictogaster. 



End of abdomen normal 4. 



4. — Discoidal cell iu hind wing opeti Nilo. 



Discoidal cell iu hind wing closed ^,... JMurniouia. 



HYDROPHILID^ . 



We have but one genus, Phryxicoma. 



RHYACOPHILID^. 

 1. — No ocelli Bersea. 



Ocelli present 2. 



2.~Spurs 3-4-4 Rliyacophila. 



Spurs 2-4-4 Agapetus. 



Spurs 1-4-4 or 0-4-4 Cliiniarrlia. 



LEPTOCERID.E. 

 1. — Last joint of maxillary pal])i .short, wings with a median cell, spurs % 2-4-2, 

 9 2-4-4 Heteroplectroii. 



Last joint long, filiform 2. 



2. — Four spurs on middle tibia 3. 



Two spurs on middle tibia 4. 



3. — Spurs 2-4-3 Aiiisceiitropus. 



Spurs 2-4-4 '. Molaiina. 



4. — Spurs 2-2-2 Lieptoceriis. 



Spurs 0-2-2 or 1-2-2 5. 



5. — Wings black Mystacides. 



Wings pale Setodes. 



HYDROPSYCHID^. 

 L— No ocelli 2. 



Ocelli present Pliilopotamus. 



2.- Spurs 1-4-4 Nniicridea. 



Spurs 2-4-4 or 2-2-4 3. 



Spurs 3-4-4 Polyceiitropus. 



3.— Spurs 2-4-4 4. 



Spurs 2-2-4, large, well-marked species IVIacroiienia. 



4. — Second joint of maxillary palpus much longer than third or fourth. 



Hydropsy die. 



Second joint maxillary palpus not longer than third or fourth 5. 



.5. — Maxillary palpus, joints two, three and four equal PMycliOiiiyia. 



Third joint longer than second or fourth Tiiiodes. 



