84, Rev. A. E. Eaton’s Menograph 
Series 2. Sp. typica, L. Colombie. 
Subimago, ?. Tarsorum antici quinque-articulati, 
posteriores quadri-articulati: articulorum penultimus cze- 
teris brevior, duo priores zquales. Als posticee minimez. 
Seta tres equales. 
Leptophlebia Colombic. 
Ephemera Colombie, Walk. 1853; Palingenia Colombie, 
Hag. 1861. 
Subimago, v.s.s. 2. Thoracis tergum luteum. Ale 
semi-opacee, sub-testacew; nervi transversales apicales 
aree marginalis anticee numerosi, simplices, obliqui, et 
curvati. Pedum antici saturate caryophyllei, tarsis luteis ; 
posteriores lutei. Abdomen supra castaneum, infra 
lutescens; segmenta intermedia singula apicibus stri- 
gisque lateralibus obliquis atris. Setee fuliginosee, junc- 
turis et mediis articulorum saturatioribus. 
Long. corp. 2 10, al. 15, set. 9 mm. 
Hab.—British Colombia. 
Perhaps Baetis tessellata, Hag., is to be referred to 
this species (see Heptagenia tessellata) . 
Series 3. Sp. typica, D. marginata. 
Nympha reptans, laminis branchialibus pinnati-partitis 
peene filiforme-dissectis. (Pict.) 
Alis erectis, setisque lateralibus a media varis, stans 
super pedes omnes, subimago quiescit. 
Imago. Pedibus anticis elevatis et divergentibus mas 
dormit. @ Tarsi ferme quadri-articulati (rarissime arti- 
culus quintus tibiz adnatus obscure indicatur): articu- 
lorum penultimus ceteris brevior, duo priores subzequales ; 
ungues postici dissimiles. Sets tres equales vel sub- 
zequales. Pedum forcipis numerus articulorum a duobus 
ad quatuor pro specie variat, primus tamen semper long- 
issimus est. Coste alarum posticarum haud excise. 
Leptophlebia marginata. 
(Genitalia maris, Pl. IV. fig. 25, 25 a,b. Ale antice 
pars, Pl. II. fig. 2a.) 
Ephemera marginata, Lin. 1767. EH. viridescens, Fourc. 
1785. HH. procellaria, Schwarz, Nomencl. Résels. Insect. 
