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2(1). Abdomen without paratergites . . . . . . . . . . . . . . . . .. . . . . . . . . . . ..Palaminus Erichson

Abdomen with paratergites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3(2). Mandible with a bidentate tooth in the middle; head and pronotum densely to moderately

punctured. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pinophilus Eichelbaum

Mandible edentate in the middle; head and pronotum sparsely punctured . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Araeocerus Nordmann

Key to the Genera of Trichopseniinae

1. Mesosternal intercoxal process acute. . . . . . . . . . . . . . . . . . . . .. . . . . Trichopsenius Horn

Mesosternal intercoxal process broad and blunt. . . . . . . . . . . . . . . . . . . Xenistusa LeConte

This key is extracted from that of Pasteels and Kistner (1972).

Key to the Genera of Euaesthetinae

1. Abdomen without paratergites . . . . . . . . . . . . . . . . . . . . . . . . . . .. . Stictocranius LeConte

Abdomen with paratergites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2(1). Labrum with a row of comb-like teeth anteriorly; head between the eyes convex; pronotum

without fovea near base; first visible tergite without a carina. . . . Euaesthetus Gravenhorst

Labrum without teeth; head biimpressed between eyes; pronotum with several deep foveae

along base; first visible tergite with a median carina.. . . . . . . . . .....Edaphus Motschulsky

This key is from Blatchley (1910).

Key to the Genera of Lispininae

1. Tarsus three-segmented. . . . . . . . . . . . . . . . . . . . . . . . . . . . Thoracophorus Motschulsky

Tarsus five-segmented . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2(1). Anterior coxae contiguous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Anterior coxae separated by a spatulate process of the prosternum. . . . . . . . . . . . . . . .. 5

3(2). Pronotum little narrowed at base. . . . . . . . . . . . . . . . . . . . . . . . Clavilispinus Bernhauer

Pronotum half as wide at base as at apex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4(3). Head with two longitudinal frontal impressions; pronotum with two apical denticles . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .Renardia Motschulsky

Head without frontal impressions; pronotum without apical denticles . . . . .Eleusis Laport

5(2). Abdominal sternites without diagonal strigae .. . . . . . . . . . . . . . . .... .Nacaeus Bernhauer

Abdominal sternites with diagonal strigae which are sometimes not completely separate from the large punctures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lispinus Erichson

This key is taken from the study by Moore and Legner (1974) which gives full generic descriptions and an illustration of a member of each genus.

The use of the name Renardia Motschulsky in place of Eumalus LeConte is in accordance with the study by Hammond (1970).

Key to the Genera of Osoriinae

1. Anterior tibia much enlarged, strongly spinose. . . . . . . . . . . . . . . . . . . . . . Osorius Latreille

Anterior tibia not enlarged, not or feebly spinose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2

2(1). Last segment of maxillary palpus not narrower than penultimate; truncate, not dentate. . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .Neotrochus Blackwelder