Limnogonus luctuosus

89. Limnogonus luctuosus (Montrouzier).

Gerris luctuosa Montrouzier, Soc. Linn. Lyon, Ann. (n. s.) 11: 242, 1864.

Three macropterous females, Agana Swamp, May 4, Usinger. These are slightly smaller, 7.75 mm., than female examples from Tahiti and have the yellow lateral lines of the sides of the mesothorax as in Lundblad's figure 2, b (B. P. Bishop Mus., Bull. 113: 124, 1934), but not constricted near the middle and with the truncated end connected at its upper angle to an additional pale spot behind the black-rimmed spiracular slit. In other respects these Guam specimens agree with Lundblad's revised description (Arch. Hydrobiol., Suppl. 12:380, 1933). Known elsewhere from New Caledonia, New Hebrides, Samoa, Tahiti, Raiatea, Murray, and Caroline Islands.