290 
Psyche 
[Dec. 
Fig. 50. 
Fig. 51. 
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Fig. 80. 
Explanation of Plate 22 
Togoperla immarginata, maxillary palpus. 
Peltoperla maria, maxillary palpus. 
Isoperla bilineata, maxillary palpus. 
Harrisiola flavescens, maxillary palpus. 
Alloperla coloradensis, maxillary palpus. 
Perlesta, maxillary palpus. 
Kathroperla, head. 
Harrisiola, ocellar area. 
Perliola 5-punctata, ocellar area. 
Hydroperla hastata, ocellar area. 
Isogenus frontalis, ocellar area. 
Perla capitata, ocellar area. 
Walshiola marlynia, (left) Diploperla modesta, (right) eye and 
side of head. 
Togoperla immarginata, ocellar area. 
Calliperla luctuosa, ocellar area. 
Perlodes (left), Isogenus (right), eye and side of head. 
Togoperla immarginata, lower face. 
Acroneuria calif ornica, ocellus and boss. 
Diploperla misnoma? , ocellus and boss. 
Atoperla epliyre, ocellus and boss. 
Neoperla clymene, ocellus and boss. 
Megahelus bellona, ocellus and boss. 
Clioperla maculata, ocellus and boss. 
Walshiola signata, ocellar area. 
Togoperla immarginata, ocellus and boss. 
Walshiola montana, ocellus and boss. 
Peltoperla arcuata, ocellus and boss. 
Alloperla borealis, ocellus and boss. 
Clioperla ebria (left), Perlinella drymo (right), eye and side of 
head. 
Eccoptura xanthenes, ocellar area. 
Acroneuria carolinensis, ocellar area. 
