Neuroptera of the Hawaiian Islands. 239 
2 to 6, expanding on the sides of the sixth, on the seventh the 
apex is broadly black, which is continued laterally for nearly 
the whole length, a large spot on the sides of the eighth; in 
the female the apical rings are more distinct, and there is a 
subapical narrower ring on the second to fourth segments, fifth 
with a broad apical ring enclosing a transverse spot of the 
ground-colour, sixth with a very broad apical band which is 
trifid anteriorly, seventh and eighth wholly black except at the 
sutures, ninth black at its base. 
3. The tenth segment has a deep triangular excision 
on its margin. Superior appendages longer than the tenth 
segment; the lower dilated portion divided internally into 
two blunt teeth, whereof the upper is black; apical por- 
tion stout, curved, obtuse, black. Interior appendages more 
than half the length of the superior, cylindrical, the tips in- 
curved and black. 
9. The appendages are very short, stout, conical, black. 
Valvules moderate, not reaching the extremity of the abdo- 
men, red, their appendages (broken) black. 
Length of abdomen, ¢ 47 millim., 2 42 millim.; length 
of pusterior wing, ¢ 32 millim., 9 386 millim.; expanse, 
6 69 millim., 2 74 millim. 
“ At the head of Wailuku valley, Maui” (Blackburn, one 
male, one female, No. 26). 
In colour strikingly resembling Pyrrhosoma mintum. 
Megalagrion oceanicum, n. sp. 
Wings hyaline. Pterostigma surmounting two cellules, very 
oblique on its outer edge, the lower distinctly shorter than the 
upper, reddish brown. Neuration black. Quadrilateral having 
its upper edge scarcely one fourth the length of the lower in 
the anterior wings, one third the length in the posterior. A 
single row of postpterostigmatical cellules. Postcostal area 
with simple cellules up to about the level of the nodus, after- 
wards a double series (neuration otherwise not complicated). 
Twenty-one or twenty-two antecubital nervules in the anterior 
wings, eighteen in the posterior. Five cellules between the 
quadrilateral and the nodus. 
Head and thorax black. Abdomen bright red. 
Labium pale yellow. A broad margin to the labrum, a spot 
on either side of it, the orbits anteriorly, the vertical portion 
of the rhinarium, a band above it, the lower side of the first 
antennal joint, all yellow. Postocular spots large, nearly 
connected by a line, reddish orange. 
Prothorax having its posterior margin gently elevated and 
rounded; the neck, two median spots (geminate), a discal 
