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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . . 2