150 Rey. A. E. Eaton’s Monograph 
Imago, v. s. s. ¢. Thoracis tergum rufo-luteum. 
Alee vitrine ; anticze nervis atris, tribus prioribus longi- 
tudinalium testaceis exceptis ; posticee nervis pellucidis. 
Pedes lividi vel straminei, femoribus fusco bicinctis, 
juncturisque obscuris ; tarsi antici albicantes, juncturis 
obscuris. Abdomen tribus segmentorum apicalium rufo- 
luteis, et ceteris ochroleucis juncturis fuscis ; venter 
immaculatus. Sets albo-cervine, juncturis vix obscuris. 
@. Corpus ochraceum, juncturis abdominalibus an- 
guste nigricantibus. Processus ventralis penultimi seg- 
mentorum vix emarginatus. Al fulgore fere talcoso. 
Long. corp. ¢ 9, ? 8-10; al. ¢ 10, ? 11-18; set. 
3 20, 2 subim. 16 mm. 
Hab.—St. Martin’s Falls (Barnston); Tennessee (Poep- 
pig) ; West Farms, New York (Angus, MS.). 
Heptagenia vicaria. 
(Genitalia maris, Pl. VI. fig. 23, 23a.) 
Baetis vicaria, Walk. 1853 (imago). (?) B. tessellata, 
Walk. 1853 (subimago, ¢ ).* 
Subimago ? (tessellata, Walk.),v. s. s. Ale pallidis- 
sime fusco suffuse, nervis testaceo-brunneis, et horum 
transversalibus fuliginoso marginatis. 
Imago, v.s.s. ¢. Thoracis tergum brunneo-luteum. 
Ale vitrine, nervis fuscescentibus ; apex arez marginalis 
antice pallidissime fuscescente vel virescenti- griseo 
tinctus. Abdomen supra pallide fuscum: dorsum ven- 
terque utrinque serie signorum 6-formatorum fulvorum, 
* From one or two particulars in the description, I am inclined to think 
that Baetis tessellata, Hag., may be a Leptophlebia. It may be L. colom- 
bie, Walk., on the point of casting the subimaginal pellicle. 
Baetis tessellata, Hag. 1861; (nec. Walk. 1853). 
Subimago. @. “Als grisew, nervis luridis, et maculis quadratis pellu- 
cidis numerosis; postice minime. Thorax luteus; mesothorax linea 
fusca utrinque. Pedes lutei, apicibus tarsorum fuscis. Abdominis seg- 
menta lutea, maculis trigonalibus latero-dorsalibus utrinque fuscis dua- 
bus.” (Hag.) 
Long. corp. 2 16, exp. al. 26 mm. 
Hab.—Puget Sound, Washington Territory (Hag.). 
As the type is in alcohol (in the Berlin Museum) its affinities can be 
easily determined. 
