34 KEV. A. E. EATON ON EECENT EPHEMERID.E OR MAYFLIES. 



between it and the quasi-subcosta (3). This simple nervure (prsebrachial ?) forms the 

 posterior limit of the region provided with cross veinlets ; of these there are about 25 in 

 the marginal area, from 2 to 5 in the next area, and one or two in the area next to that. 

 Length of body 9, wing 10, setae 8 mm. 



Hab. Sao Paulo, Rio Solimoes, October 18, 14, and November 26th, 1874 [Trail, 

 M-^Lach. Mus.), " at light." 



Spaniophlbbia pallipes, sp. nov. 



Adult {dried), 6 . — Pronotum, sides and underside of the thorax, the hinder border 

 of the mesonotum, and the metauotum, light Vandyke-brown ; the mesonotum in 

 advance of the peak, darker or dull black. Abdomen discoloured, lighter beueath than 

 above ; the dorsum nearly concolorous with the metanotum. Setse white, pubescent 

 throughout. Pore femur in opaque view very light dull brownish-yellow, changing in 

 transmitted light to light yellowish-amber ; the tibia in opaque view nearly of the same 

 colour as the femur, but light brown at the tip ; the short joints, the ungues and the tip 

 of the terminal joint of the tarsus light brown, the rest of the terminal joint whitish 

 brown. Hinder legs very similar but a little lighter. Wings transparent, tinted, very 

 faintly indeed, with extremely light Vandyke- or sepia-grey, -changing in some positions 

 to a like shade of Roman sepia-grey, and " shot" with a rather dull intense blue ; their 

 nem'ation in a large extent light pitch-brown, growing paler towards the wing-roots, 

 changing in some lights to light Vandyke- or warm sepia-brown. The nervure in front 

 of the anal (8) of the fore wing is joined by a weak and flexuous branch nearly in the 

 middle of the wing, at a point further from the wing-roots than the fork of the anal 

 nervure, and shortly before the great cross vein, is joined also by the longer of the two 

 nervures interposed between it and the radius (3) ; the shorter of these interposed 

 nervures meets the radius a little beyond the middle ; the subcosta is visible at the bottom 

 of a deep fold of the membrane when the wing is viewed edgeways from in front, but is 

 concealed by the radius when the wing is viewed from above ; the anal nervure bounds 

 posteriorly the portion of the wing traversed by cross veinlets ; the number of these in the 

 marginal and submarginal areas (if any exist there) cannot be ascertained ; but in the 

 area between the radius (3) and the shorter of the interposed nervures are 6-8, which are 

 thickened towards their junction with the radius ; in the next area are 5 or 6 cross 

 veinlets ; within the fork of the next nervure 2 or 3 ; and between this nervure and the 

 anal, from 2 to 4 cross veinlets. Length of body, 6 , about 11 (not allowing for shrinkage) ; 

 wing 16-17 ; seta? 40 (or more) mm. 



Hub. Ecuador (M-^^Lach. Mus.). 



LACHLANIA, Hag. 18(J8. 



Illustrations. Adult (details), PI. III. 5 (whole figures), see citations of Hagen and 

 Packard under L. abnormis. 



Adult. — Anal nervure of the fore wing forked ; no epinotal free appendage to the 

 membrane decurrent from the wing-roots ; cross veinlets, as a rule (with rare individual 



