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-7- 4(2). Head hardly narrowed behind eyes .. . . . . . . . . . . . . . . . . ... .. . . .. . .Syntomium Curtis Head strongly narrowed
behind eyes. . . . . . . . . . . . . . . .. . . . . . . . . . Deleaster Erichson 5(1). Elytra dehiscent (inner apical angles
strongly rounded) . . . . . . . . . . . . . . . . .
. . . . . . . 6 Elytra not dehiscent
(inner apical angles rectangular) . . . . . . . . . . . . . . . . . . . . . .
. . . 8 6(5). Anterior tibia without spines on the outer
edge . . . . . . . . . . . . . Thinobius Kiessenwetter
Anterior tibia with spines on the outer edge. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. 7 7(6). Middle coxae separate. . . . . . . . . . . . . . . . . . . . . .
. . . . . .. . .Platystethus Mannerheim Middle coxae
contiguous. . . . . . . . . . . . . .
. . . . . . . . . . . . . . .. . . . . . . .Bledius Leach 8(5). Anterior tibia without spines on the outer edge. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .. 9 Anterior tibia with
spines on the outer edge. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . .. 10 9(8). Middle coxae contiguous. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .Aploderus Stephens Middle coxae separate.
. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . Oxytelus Gravenhorst 10 (8). Body glabrous except for a few long setae.
. . . . . . . . . . . . . . . . . . Apocellus Erichson Body pubescent. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . .. 11 11(10). Last segment of maxillary palpus conical, apex abruptly
narrowed and
pointed. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . Ochthephilus Mulsant and Rey Last segment of maxillary palpus cylindrical, subulate . . .
.. . . . . . . Carpelimus Leach Herman (1970)
published an extensive generic revision of the Oxytelinae
of the world with entirely new phylogenetically based keys to the genera. We
have not used his keys here, because some of the characters are difficult or
impossible to observe in typical museum specimens. In one example, he used the
pattern of sculpture on the scutellum, which is usually only partly visible.
In another case (his page
386), he used segmentation of the tarsi: ". . . the basal three articles are so closely associated that the tarsus must be treated in potassium hydroxide
before all the articles can be seen."
To attempt to sort specimens with a key based on these characters
would be impractical. However,
Herman's study is a valuable contribution to the knowledge of the group and
represents the first complete revision of the world genera of a large
subfamily since 1840. Because easy identification was .the purpose of our study,
we also have not followed Herman's separation of Anotylus from Oxytelus and Thinodromus from Carpelimus. In our
key, Anotylus
goes to Oxytelus
and Thinodromus
goes to Carpelimus.
. Herman (1972b)
separated two new genera, Microbledius and Psamathobledius from Bledius based on a similarly cryptic tarsal formula. We have
not followed this separation for the same reasons. These two genera go to Bledius in our key. We do not imply that our treatment places Herman's genera
in formal synonomy; we are merely attempting to make identifications simpler. Megalopsidiinae This subfamily is represented by the single genus . . . . . . . . . .
. . . .Megalopinus Eichelbaum. Key to the Genera of Hypocyphtinae 1. Middle coxae distant; mesosternum not carinate. . . . . . . . . . .
. . . . . . . . . .. . Cypha Leach Middle coxae narrowly
separated; mesosternum carinate. . . . . . . . . . . . . . Anacyptus Horn Key to the Genera of Pinophilinae 1. Middle tibia spinose externally. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . Lathropinus Sharp Middle tibia not spinose externally . . . . . . . . . . . . .
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