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-6-

 

34(33). Mesosternum longitudinally carinate. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .. 35

 

           Mesosternum not longitudinally carinate. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .. 36

 

35 (34). Sides of pronotum entire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Omalium Gravenhorst

 

           Sides of pronotum crenulate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Acrulia Thomson

 

36(34). Antenna with only last three segments thickened . . . . . . . . . . . Pycnoglypta Thomson

 

           Antenna with last five to seven segments thickened. . . . . . . . . . .  . . . . . . . . . . . . .. 37

 

37 (36). Third antennomere slender at base; pronotum without ground sculpture . . . . . . . . . . . .

            . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Elonium Leach

 

            Third antennomere not notably slender at base; pronotum with ground sculpture of 

            irregular fine lines connecting the punctures . . . . . . . . . . . . . . . .Hapalaraea Thomson

 

       The genera of the tribe Coryphiini are largely from Hatch (1957) where most of them are illustrated. The key to the genera of the Anthophagini is taken from the paper by Moore (1966) in which a member of each genus is illustrated.  The generic name Elonium Leach is used to replace Acrolocha Thomson following Herman (1970). Some of the species listed in our catalogues under the name Omalium Gravenhorst do not have the metasternum carinate. New genera will be required for them.

 

Key to the Genera of Leptotyphlinae

 

1. Gular sutures united in front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

 

    Gular sutures separate in front. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4

 

2(1). Temple clearly convex; mandible with a strong basal tooth. . . . . . . . .  Neotyphlus Coffait

 

        Temple hardly convex; mandibles without a basal tooth. . . . .. . . . . . . . . . . . .  . . . . . .. 3

 

3 (2). Second tarsal segment less than two times as long as first, the first two together about as

         long as the third. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . .Heterotyphlus Coffait

 

        Second tarsal segment nearly equal in length to second, the first two together clearly

        shorter than third. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   . . . .Prototyphlus Coffait

 

4(1). Parameres absent; aedeagus lying on the right side in repose .. . . . .. Xenotyphlus Coffait

 

        Parameres reduced to three tiny lobes; aedeagus lying on the left side in repose.  . . . ... 5

 

5(4). Frontal ridge interrupted in the middle.. .. . . . . . . . . . . . . . . . . . .. .Homeotyphlus Coffait

 

        Frontal ridge entire. . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

 

6(5). Median lobe of aedeagus tubular and slender. . . . . . . . . . . . . . . . . Cainotyphlus Coffait

 

        Median lobe of aedeagus thick in basal part. . . . . . . . . . . . . . . .. . . . Telotyphlus Coffait

 

       This key is slightly modified from Coiffait (1962). These tiny pale soil inhabiting insects will probably always be difficult to study.

 

Key to the Genera of Oxytelinae

 

1. Tarsus clearly five-segmented . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

 

    Tarsus seemingly of less than five segments. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . ..   5

 

2(1). Tibiae with spines on outer edge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

 

        Tibiae without spines on outer edge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .     4

 

3 (2) . Gular sutures divergent before the middle; ungues strongly arcuate. Coprophilus Latreille

 

          Gular sutures very approximate for most of their length; ungues hardly arcuate. . . . . . . ..

         . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .  Manda Blackwelder