new Species of Odonata. 21 
incurved; longer than the tenth segment; on the median 
portion externally are 6-7 small teeth; internally near the 
base is a very strong acute triangular tooth, after which the 
margin presents two dilatations, with a strong constriction 
after the second, the apex again dilated. Inferior ap- 
pendages yellowish, scarcely one third the length of the 
superior, triangular, inner edges nearly touching at the base, 
then divergently oblique, the outer edge straight; the tips 
rounded, with yellowish hairs. 
? unknown. 
Length of abdomen (cum append.) 37 millim.; expanse of 
wings 62 millim.; length of posterior wing 30 millim. 
Hab. California (Henry Edwards). One adult male. 
I received this example from Mr. Edwards many years 
ago; it bears his printed locality label ‘ California,” 
without more precise indication. M. de Selys, to whom it 
was submitted, labelled it with the name I have adopted, but 
it has never been described. * 
The species should be placed in Archilestes, according to 
the ensemble of structural characters; but in the practical 
absence of bronzy or metallic colour of the body it diverges 
widely from the typical A. grandis, Rbr., and also from the 
majority of species of the “ légion”’ Lestes. 
OROLESTES, gen. nov. 
Wings for the greater part opaque blackish in the male, 
petiolated up to the first postcostal basal nervule, which latter 
is placed nearer the level of the second than of the first ante- 
nodal nervule. Nodal sector commencing 8% cellules after the 
nodus in the anterior wings (7-74 after in the posterior) ; 
ultra-nodal sector commencing 3-4 cellules after the nodal. 
None of the sectors distinctly broken (angulose), excepting 
the inferior of the triangle at its apex (the ultra-nodal and 
short sectors very slightly broken) ; one supplementary sector 
(and the rudiment of another) interposed between the nodal 
sector and the median. Pterostigma very large, dilated, 
more than four times as long as broad, surmounting 5-6 
cellules. Quadrilateral broad, the lower side quite twice the 
length of the inner, the outer angle somewhat acute. 
Abdomen slender. Spines of legs moderate. 
Hab. North India. 
Differs from all the other genera of the “ légion”’ by the 
coloured wings (of the male, at any rate) and structurally by 
the very large pterostigma and the distant point of departure 
of the nodal sector. 
