. Economic entomology . Atax histrionicus, female. About the size of a mustard seed. The male is pale yellowish green, the female a rich purple, with four large black blotches. Besides the foregoing, Koch proposes several other genera for species of this group, viz.: Nesea, Fiona, Hygrobates,Atractides,Acercus, andMARiCA; but neither his figures nor his descriptions are sufficiently precise to allow of our judging as to their value, especially in a family where the general resemblance and the sexual differences are both so great. "* Genus Pontarachna {Filippi). No. 25. Pontarachna punctul
. Economic entomology . Atax histrionicus, female. About the size of a mustard seed. The male is pale yellowish green, the female a rich purple, with four large black blotches. Besides the foregoing, Koch proposes several other genera for species of this group, viz.: Nesea, Fiona, Hygrobates,Atractides,Acercus, andMARiCA; but neither his figures nor his descriptions are sufficiently precise to allow of our judging as to their value, especially in a family where the general resemblance and the sexual differences are both so great. "* Genus Pontarachna {Filippi). No. 25. Pontarachna punctulum, FH.—25. Magnified sketch of ditto, copied from drawing a. d description of Filippi. This is a very minute and inconspicuous Hydrachna, with a madder-brown irregular shaped patch covering the back; but it is interesting from its having been found in the sea at Naples, instead of in fresh water. Since then another from the North American Seas has been described by Dr. Packard. Filippi made the separate genus for his species, which we have adopted on his responsibility.
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