TiLLYARD.—Two New Species of May-flies from New Zealand. 927 
bdomen narrow subcylindrical, tapering posteriorly. Segments 1-6 
dark brown, heavily marked with dull-blackish in the form of a transverse 
basal band, from which project two elongated longitudinal marks, one on 
either side of the median line, and reaching to within a short distance of 
the apex of each segment; 7-8 paler brown, with similar blackish basal 
band, but with shorter longitudinal projecting marks, reaching only about 
half-way along each segment; 9 pale brown, with very narrow blackish 
basal band and slender longitudinal projecting marks; 1 1 ; 
with narrow blackish basal band and no projecting marks. Ventral valve 
cleft in middle, its margin forming two rounded lobes (fig. 2, f) ; those of 
the other New Zealand species are shown for comparison in fig. 2, d, е. 
Cerci (partially shrivelled) somewhat longer than abdomen, brown, with 
arker segmental rings. Appendix dorsalis much reduced, only 3 mm. 
long, much shrivelled, with numerous minute obsolescent segments. 
a 
Fie. 1.—Ameletus fiavitinctus n. sp.: female imago, wings. X 5:4. The shaded 
Wings brilliant, most of the membrane a pale transparent yellowish, 
but with certain areas left absolutely hyaline, as shown in fig. 1. It will 
be seen that these areas are chiefly those formed where the very irregularly 
placed cross-veins lie farthest apart. Veins blackish. Forewing with two 
hindwings of A. perscitus Eaton and A. ornatus Eaton are shown for 
comparison in fig. 2, a, 6. 
9. Subimago: The specimen described above was captured in the 
subimaginal stage, but had changed into the imaginal stage before it was 
Шей. The subimaginal stage has opaque wings, remarkably variegated 
in the bold manner shown in the subimago of Atalophlebia versicolor Eaton. 
Male unknown. 
Type.—Holotype female imago in Cawthron Institute collection. 
S* 
