. An illustrated descriptive catalogue of the coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana : with bibliography and descriptions of new species . Beetles. TIIE LONG-TOED WATER BEETLES. 677 KEY TO SUBFAMIUES OF VASNTDM. a. Abdomen with more than five ventral segments; front cosse with very large trochantin; body subdepressed. Subfamily I. Psephenin^, p. 677. 00. Abdomen with only five ventral segments; body convex. 6. Front coxae transverse, with distinct trochantin; body clothed with a dense silky pubescence. Subfamily II. 'Pam^sisje. p. 678. &6. Front cox
. An illustrated descriptive catalogue of the coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana : with bibliography and descriptions of new species . Beetles. TIIE LONG-TOED WATER BEETLES. 677 KEY TO SUBFAMIUES OF VASNTDM. a. Abdomen with more than five ventral segments; front cosse with very large trochantin; body subdepressed. Subfamily I. Psephenin^, p. 677. 00. Abdomen with only five ventral segments; body convex. 6. Front coxae transverse, with distinct trochantin; body clothed with a dense silky pubescence. Subfamily II. 'Pam^sisje. p. 678. &6. Front coxae rounded without trochantin; body feebly pubescent. Subfamily III. Elmin^, p. 679. .Subfamily I. PSEPHENINAE. In this subfamily the head is free, not retractile; labnim broad, entirely covering the mandibles: maxillary palpi elongate, the last joint wide, hatchet-shaped; antennse widely separated, serrate, 11- jointed, longer than head and thorax; prostemnm earinate, pro- longed behind into an acute point which fits into a narrow groove extending the full length of the mesosternum; abdomen of male with seven ventral segments, the first and second united, fifth broadly emarginate, sixth deeply bilobed. visible only around the notch of the fifth; seventh rounded, entire, filling the notch of the sixth; female with the corresponding to the sixth in male absent. The subfamily is represented by the single genus I. PsEPHExrs Hald. (Gr., "dark or ;) Four species represent the genus in the United States, one of which occurs in Indiana. (3914). PsEPHExrs lecoxtei Lee, Proc. Phil. Acad. Xat. Sci., VI. 41. Oval, subdepressed, narrowed in front, obtusely rounded behind, very finely punctate and pubescent. Black or dull brownish-black; head and thorax usually darker, always deep black in the female. Base of thorax twice as wide as apex, bisinuate, distinctly lobed at middle; hind angles acute, sides regularly curved. Length mm. (Fig. 25
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1910
