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CarPENTER—Some Dragonflies in the Dublin Museum. 487 
accessory claws (fig. 10), the species cannot be retained in the 
genus Leptobasis. It must be transferred to that which the Baron 
de Selys Longchamps called first Telebasis, later Erythayrion, 
though it differs from the other species in the male, having the 
abdomen of a dark metallic bronze above, like the female, instead 
_ of a bright red. 
Male.—Length, 45mm. Expanse, 43 mm. 
Head, dark bronze above and in front; with orange trans- 
verse edge to occipital region; pale behind and beneath. Thorax, 
orange ; pronotum, with central longitudinal dark stripe, spread- 
ing transversely on hinder lobe; mesothorax, with central and 
lateral dark bronze stripes; thorax, pale beneath. Abdomen, 
long and slender, dark bronze above, pale beneath; hinder 
segments, entirely dark, nearly black; appendages of the second 
segment (figs. 13, 14), very prominent and complicated ; central 
organ membranous, and recurved at its extremity ; a pair cf palp- 
like structures directed backwards from the middle of second 
segment, and a pair of prominent, rather truncated, processes 
from hinder margin, projecting beyond third segment; upper 
anal appendages much shorter than lower, stout and conical as 
viewed from above, truncated and depressed as viewed from side, 
brown in colour; lower appendages, black, prominent, and forci- 
pated (figs. 11, 12). 
Female.—Length, 40mm. Expanse, 42 mm. 
In colour and markings closely resembling the male, but the 
terminal and abdominal segments are paler beneath; these seg- 
ments are greatly swollen, and bear two pairs of small appendages 
(fig. 15). 
In the wings of both sexes, the quadrilateral has (as noted for 
the male by the Baron de Selys) the upper side two-fifths as long 
as the lower in the front pair, three-fifths in the hind pair, and 
the postcostal nervure is much farther from the first than from the 
second antecubital. The number of postcubitals in our specimens 
is twelve in the front, which it varies from nine to eleven in the 
hindwings. 
