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6(5). Tarsus 5-segmented . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Omaliinae

 

 Tarsus 2- or 3-segmented . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . Leptotyphlinae

 

7(5). Abdomen with complete second sternite (seven sternites can be counted) . . . . . . . . . . . .

        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Oxytelinae

 

        Second sternite absent or rudimentary (six sternites can be counted) . . . . . . . . . . . . ... 8

 

8 (7). Anterior margin of labrum with two long anteriorly directed processes which are setose

         within. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   . . . . . . . .. . . . . . Megalopsidiinae

 

        Labrum without such processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . 9

 

9(8). Antenna 10-segmented , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Hypocyphtinae

 

        Antenna II-segmented . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

 

10(9). Last segment of maxillary palpus longer than penultimate, slightly arenate, with an

         oblique, elongate, concave truncation of distinctive texture at apex . . . . . . .Pinophilinae

 

         Last segment of maxillary palpus not so formed. . . . . . . . . . . . . . . . .   . . . . . . . . . . .11

 

11 (10). Metasternum with expanded plate covering part of posterior femur .. ...Trichopseniinae

 

           Metasternum without such plates; femur exposed. . . . . . . . . . . . . . . .. . . . . . . . . . .12

 

12(11). First segment of maxillary palpus elongate, at least one-half as long as second . . . . . .

           . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . Euaesthetinae

 

       First segment of maxillary palpus short, never more than one-third as long as second. .  13

 

13(12). Abdomen without paratergites (without double margin) . . . . . . . . . . . . . . . . . . .. . . . 14

 

             Abdomen with paratergites (with prominent double margin) . . . . . . . . . . . . .. . . . . ..15

 

14(13). Hypomeron not visible from the side . . .  . . . .  . Sepedophilus Gistel  (Tachyporinae)

 

           Hypomeron visible from the side at least in part. . . . . . . . . . . . . . . . .  . . . . . . . . . . .16

 

15(13). Anterior coxae small, globular, without a transverse or diagonal sulcus on anterior face .

           . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . Lispininae

 

           Anterior coxae large, elongate, with a transverse or diagonal sulcus on anterior face . . . 

           . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .Osoriinae

 

16(14). Anterior coxae small, globular. .. . .. . . . . . . . . . . . . . . . . . . . .  . . . . . .. . . .Piestinae

 

           Anterior coxae large, elongate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . 17

 

17 (16). Elytra long, completely covering first tergite. . . . . . . . . . . . . . . . . . . . . . .Proteininae

 

            Elytra not completely covering first tergite . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .18

 

18 (17) . Each basal abdominal tergite with a diagonal impressed line from near the middle front

             margin to each apical angle; pronotum and elytra costate . . . . . . . . .  .Pseudopsinae

 

             Abdomen without such lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

 

19(18). Head constricted behind eyes to form a distinct neck that is clearly visible from above . . 

           . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

 

           Sides of head converging uninterruptedly to base, not constricted to form a neck that is

           clearly visible from above. . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . .. . . . . . . .   26

 

20 (19). Small sclerite (neck plate) present at anterior margin of prosternum. . . . . . . . . . . . . . . 

             . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . ..Xantholininae

 

Neck plate absent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . .  21

 

21 (20) . Last segment of maxillary pal pus less than one-half as long as penultimate, usually

             little longer than width of penultimate, usually subulate or papilliform. . . .  . . . . . .    22

 

             Last segment of maxillary palpus at least one-half as long as penultimate, subulate

             only in Heterothrops. . . . .  . . . . . . . . . . . . . . . .  . . . . . . . . . . . .  . . . . . . . . . .   23