— a ee 
CARPENTEE—Some Dragonflies in the Dublin Museum. 485 
occiput, blackish. Thorax, dull black, somewhat reddish beneath ; 
abdomen, entirely shining black. Anal upper appendages (fig. 7), 
slender and curved at base, enlarged and truncated at apex, a 
little longer than lower appendage ; aperture of second segment 
bounded in front by a conical “ hood,’ at sides behind by a pair 
of prominent lobes; appendages rather large, terminating in 
small hooks pointed backwards (figs. 8,9). Wings (fig. 6), hyaline, 
very slightly tinged with brown at base; pterostigma, blackish ; 
forewings, with fourteen antecubital and ten postcubital nervures ; 
triangle followed by one row of three cells, then two; hindwings, 
with eleven-twelve antecubital and ten-eleven postcubital nervures; 
lower basal cell with two nervures; legs, black, with coxee and 
insides of front femora yellowish. 
Nicaragua.—(Coll. Miss Hamilton). 
This species differs from I. parana, Kirby, the type of the 
genus in having the frontal tubercle bifid instead of convex, and 
the appendages of second segment much less conspicuous; but, 
I think, the agreement in wing-neuration is sufficient to warrant 
its inclusion in the same genus. It may be readily separated 
from IW. parana by its black colour and the smaller number of 
antecubital and postcubital nervures in both wings. 
Genus.—ZYXOMMA, Rambur.? 
Zyxomma multinervis, sp. nov. 
(Pl. XVI., figs. 1-4.) 
Male.—Length, 52mm. Expanse, 85mm. Pterostigma, 3mm. 
Head.—F ace and sides of clypeus, yellow; labrum, black ; 
mouth-parts brown; centre of clypeus and frontal tubercle, 
black. Thorax and three basal segments of abdomen pruinose ; 
remainder of abdomen, shining black. Hinder lobe of the second 
segment rounded ; prominent aperture, bounded in front by large 
spherical “hood”; appendages small, yellow, with recurved hooks 
(figs. 3,4). Paired anal appendages as long as the two terminal 
segments ; nearly straight, evenly dilated at apex ; lower appendage 
1 « Tnsectes Neuropterés,’’ Paris, 1842 (p. 30). Kirby, Cat. Neur. Odonata, Lond. 
1890 (p. 35). 
