224 NATURAL HISTORY SOCIETY OF DUBLIN. 
the type (Z. Ida, Selys) comes from Java, and has the base of the se- 
cond to the eighth segments encircled with yellow. The analogy be- 
tween the two species is very great, and I think that affinity equally 
exists; however, there are three characters which cause me to hesitate 
as to its definite position: Z. /uctifera has a smaller head, it possesses 
only one nervule in the median basal space, and the lower division 
of the tarsal claws, although well marked, is shorter than the upper; 
the equality of the two divisions of the claws is the character on which 
I founded the genus Zygonyx. 
Z. Iris, Selys, from the Malayan archipelago, forms another section, 
in which the discoidal triangles are traversed by a nervule, and the 
divisions of the claws are equal. This constitutes the type of the genus, 
such as it has been adopted by Herr Brauer. 
Genus Attotestrs, De Selys, gen. nov. 
Pterostigma thick, oblong, surmounting two to three cellulés. Re- 
ticulation rather dense; the sectors curved near the base, from the 
short sector (secteur bref) to the ultranodal with two supplementary 
sectors interposed between each. Wings strongly petiolated (as far as 
the apex of the quadrilateral), the postcostal basal nervule placed under 
the first antecubital; quadrilateral very long (the upper side one-fourth 
shorter than the lower), occupying all the space between the second 
antecubital and the nodus; a single cellule between the quadrilateral 
and the vein which descends from the nodus; postcostal space with a 
single row of cellules. 
Lower lip oblong, roundly emarginated in its final third, the extre- 
mities distant. Antennze with the first joint very short, the second 
one-half longer, the third slender, equalling the two first united. 
Abdomen moderate, slightly longer than the inferior wings. 
Legs rather long, with long ciliations; tarsal claws bifid. 
6 unknown; ¢@ with the tenth segment very short, the ninth 
shorter than the eighth. 
This genus, which resembles <Argiolestes by the pterostigma, the 
lower lip, the claws, and the strongly petiolated wings, differs from it 
by the postcostal space formed of a single row of cellules, and by one 
supplementary sector less from the short sector to the ultranodal. 
Allolestes differs from Podolestes by the less emarginated lower lip, 
by the bifid claws, by the more strongly petiolated wings, and by one 
more supplementary sector between the short sector and the ultranodal. 
It differs from both neighbouring genera by the very long quadrila- 
teral extending from the second antecubital as far as the nodus; in this 
character it has analogy only with Paraphlebia (from Mexico), which 
belongs (as does AJlolestes) to the legion of Podagrzon. 
5. Allolestes M‘Lachlani, un. sp. 
2. Abdomen 23 millim., inferior wing 20. 
Wings hyaline. Pterostigma brown, darker in the centre, encircled 
