| OCR Text |
Show 242 Subgenus Caudatella Edmunds 1959b six western North American Of to assigned this and Edmunds, . and . hystrix the subgenus, edmundsi Traver species presently species, . cascadia Allen Allen, E. heterocaudata McDunnough, known are to orestes. Allen and Edmunds tion, . in four occur in may also Idaho. found be addi In to occur state. Ephemerella (Caudatella) cascadia Allen and Edmunds (Figures 170-171) Ephemerella cascadia Allen Allen and Edmunds a series of The lengths of of this of female and Edmunds, (196la) described nymphs collected in ventral abdominal color the caudal filaments subgenuso subimagos For this from 1961a:6ll. Oregon is reason and pattern this and diagnostic the Opal Creek, species from Calirornia. relative for the species following description 18 mi. W. Cobalt, is provided to represent the previously undescribed adults: Length: Subimago (in alcohol).body 10.0; General color pale white with extensive Head white with dark triangular reddish-brown markings. Female forewing 11.0 rom. Prothorax white with maculae between ocelli; eyes black. dark markings antero-laterally, dark streak on forecoxae; mesothorax pale white with pleural sclerites darker, especi ally on episternum; mesothorax pale white; all legs pale; entire thoracic venter dark reddish-brown. Abdominal terga pale yellow with reddish-brown antero-medial triangles with anterior, more diffuse on segments 1-6; reddish-brown bases |
