. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. DRAGONFUES AND DAMSELFUES IN PONDFISH CULTURE. 241. bristles along the dorsal surface of the abdomen, between the respiratory system and the lateral margin on either side. The antennse are relatively large; base white with a pale grayish distal band; first joint white through the center, pale grayish at either end; second joint with proximal three-fifths dark and distal two-fifths white; third joint dark, tipped with white. These nymphs did not ascend to the surface of the water, like those of luctuosa, but stayed down near the bo
. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. DRAGONFUES AND DAMSELFUES IN PONDFISH CULTURE. 241. bristles along the dorsal surface of the abdomen, between the respiratory system and the lateral margin on either side. The antennse are relatively large; base white with a pale grayish distal band; first joint white through the center, pale grayish at either end; second joint with proximal three-fifths dark and distal two-fifths white; third joint dark, tipped with white. These nymphs did not ascend to the surface of the water, like those of luctuosa, but stayed down near the bottom of the . tumbler. The Mask.—Mentum twice as wide as long; the distal bor- der two and a half times the proximal; the lateral margins cm-ved; three setae on either side, near the lateral margin; three mental setse in a straight line; a slight lobed promi- nence behind the center of the distal margin, without spines. Lateral lobes one-third longer than wide; two setae on the outer border near the base; two on each blade; raptorial seta considerably longer than the movable hook, the latter short and slender; distal margin with four teeth near the outer edge, the first two the longest. ERYTHEMIS SIMPLICICOLLIS. The first females were seen laying in pond 4D on July 12, 1917. Eggs laid July 13 hatched July 23. The Egg.—The egg of this species is an elongated ellipse, with rather pointed ends, and is a little more than twice as long as wide, the respective diameters being mm. and mm. The neck has a base narrower than its height, divided at the tip; there is a small process on the posterior end of the egg; the yolk granules are minute. The Nymph.—This nymph has the most pigment of any of those examined, and is banded brown and yellowish white; the eyes are light orange yellow with comparatively large black spots; the sides of the head are brown shading into light yellow on the median line; each thorax segment is brown mm. Figs. 44 and 45.—Hybrid from male Lib
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