EEY. A. E. EATOX OX EECEXT EPlIEilERID.E OE MAYFLIES. 307 



Ephemerella ignita, and a fragmentary subimago of perhaps an undescribed species of 

 this genus, all captured Iw the same entomologists in July 1859. 



This should folloio Ameletus exquisitus, p. 213. 



Ameletus inopixatu.s, sp. nov. Plate LXV. 13 (genitalia). 



Imago {dried), ? . — Head and I)ody pitch-brown, inclining to bui'nt-umber or rufo- 

 pieeous in the hinder alxlominal segments ; venter nearly concolorous with the dorsum. 

 Legs in opac[ue view light pitch-brown; in transmitted light rich brown-amber or trans- 

 lucent raw-umber-brown. Wings viti-eous, brilliantly iridescent, tinted uniformly and 

 very faintly indeed with rusty brown or ferruginous ; neuration in opaque view ferru- 

 ginous or rufo-piceous, in transmitted light ferruginous-amber ; cross-veinlets in opaque 

 view delicate, except in the pterostigmatic region of the fore wing, and there many or 

 some of those in the marginal area divide and anastomose so as to form an irregular and 

 ratlier open reticulation. Counted at the subcosta the number of cross-veinlets in the 

 marginal area of the fore wing is 13 before the bulla, and 27-29 beyond it. Length of 

 wing 10 mm. 



Hah. Europe : the Schwarzwald and Vosges. Described from a single ? specimen, of 

 which the sette were lost, captured by M'^Lachlan at the end of July 1885 at the Eeld- 

 bergsee (1000-5000 ft.), and a single 6 'im. taken by him in 1883 at the Lac de Retourna, 

 both in M^Lach. Mus. The d' setae are light brown with opaque joinings. 



The Geo&raphical Distribution of the Genera oe Recent Ephemerid^. 



A brief summary of the geographical range of the genera and the number of known species by which 

 they are represented may here be given advantageously. 



PaUngenia : Subgenus (typical) . Eastern N. Temperate region, in large rivers, 2 sp. — Subgenus Ana- 



genesla : Indo-Mulay region and Irkutzk, 6 sp. — Subgenus , Brazil, 1 sp. 



Oligonevna : Europe, iniddle and south, with Egypt, 1 sp. ; Brazil, 1 sp. 



Elassoneuria : Natal, 1 sp. 



SpaniophleUa : tropical S. America, 2 sp. 



Lachlania : Central America and Cuba, 2 sp. 



Homoeoneuria : Central America, 1 sp. 



EiithypJociu : Tropical America, 2 sp. 



Campsurus : America, from Texas to Brazil, 8 sp. 



JoUa : Europe, S. of France ; N. America, Niagara 2 ; (?) sp. 



Polymitarcijs : Middle Europe to N. Africa, 2 sp. ; Indo-Malay region, 1 sp. ; N. America, 1 or 



(?) 2 sp. 

 Hexagenia : America N. and S., G sp. ; E. Siberia, 1 sp. (undescribed) ; Hindostan, 1 sp. (undescribed). 

 Ephemera: Northern temperate regions, 10 sp.; Hindostan, Ceylon, 3 sp. ; China, 1 sp. ; Japan, 2 



sp. ; New Zealand, 1 sp. (undescribed) . 

 Pentagen'm : Illinois and Texas, 2 sp. 



Potamanthus : Europe, middle and south, 2 sp. ; N. America, Virginia, 1 sp. (undescribed). 

 Rhoenanilms : Dutch East Indies, 1 sp. 

 Aialophkbia : Australia, 6 sp, ; New Zealand, 3 sp. ; Chili, 1 sp. ; Ceylon, 4 sj). ; Cape of Good Hope, 



1 sp. ; Japan (undescriOed). 



41* 



