88 REV. A. E. EATON ON RECENT EPHEMERID^ OE MAYFLIES. 



Atalophlebia dentata, Etn. 



Leptophlebia dentata, ! Etn., Trans. Ent. Soc. London (1871), 80, pi. iv. 18-18 ef [details]. 



Stiblmago [dried). — Wings very light sepia-grey, the cross veinlets very faintly and 

 very narrowly bordered with darker grey ; neuration pitch-black, but brownish at the 

 wing-roots. Setae deep warm sepia-brown. 



Imago {dried). — Thorax bright brown-ochre above. Abdomen light bistre-brown, 

 modified in segments 8-10 with burnt-umber, the segments narrowly bordered with black 

 at their tips. Forceps lutescent. Setae pilose, either lutescent or very light bistre-grey, 

 with black joinings. Wings vitreous, the disk very faintly tinted with yellowish ; mar- 

 ginal and submarginal areas of the fore wings coloured with dark amber-yellow (raw 

 sienna), the submarginal wholly, the marginal area only in part, viz. from the base to the 

 middle and in the distal portion of the pterostigmatic space completely, but only in about 

 half its breadth along the subcosta in the intervening space ; the cross veinlets in the 

 marginal area before the pterostigmatic space and those in the submarginal area are 

 bordered with dark bistre-brown, and give rise to a blotch or cloud at the bulla. Neura- 

 tion mostly pitch-black, but the nervures near the wing-roots, and the stouter portions 

 of the costa, subcosta, and radius are pitch-brown. Cross veinlets in the marginal area 

 about 5 before and 15 beyond the bulla, all straight. Legs luteous, the fore tarsus 

 lighter and dull, the femora more or less dark at the knee, the fore tibia black at its 

 distal extremity, the tarsal joinings piceous. ? . Ventral lobe of segment 9 emarginate. 

 Length of body, d 8, $ 7-9 ; wing, 6 11, 2 7-13 ; setae, 6 18, 2 15-16 mm. 



Eab. New Zealand (Brit. Mus.). 



Atalophlebia strigata, Etn. Plate X. 16 d (fore leg, $ , and hind wing). 



Leptophlebia strigata, ! Etn., Trans. Ent. Soc. London (1871), 80, pi. iv. 19 [detail, ?]. 



Imago [dried), 2 . — Thorax brown-ochreous above, with two subparallel longitudinal 

 black stripes on each side of the pronotum (one at the lateral border, and the other 

 midway between it and the median line of the notum), and also with the longitudinal 

 furrows in advance of the wing-roots of the mesonotum black. Abdomen light Indian 

 red, with four longitudinal black dorsal stripes and a median black ventral line extending 

 its whole length ; each stripe is mainly composed of truncate triangular spots in mutual 

 contiguity, one spot in every segment ; but in some of the posterior segments the spots 

 become oblong or linear, and are somewhat suffused with the ground-colour; the com- 

 ponent spots of the two inner stripes taper behind, those of the outer stripes point for- 

 wards and downwards : the two inner stripes are rather near together, and enclose a 

 narrow streak of the ground-colour, whose edges are even, along the track of the dorsal 

 vessel ; the outer and the inner stripes of each side are farther apart, and give a serrated 

 outline to the interspace between them, so that the ground-colour thereabouts in every 

 segment takes the form of an oblong spot, placed obliquely in the anterior segments, but 

 longitudinally in the hinder segments ; the outer dorsal stripe on each side is separated 

 by a narrow interval from the spiracular borders of the segments, excepting at the 

 extreme base of each. Setse light brown-ochreous, with reddish brown joinings. LegSi 



