Return to Publications List                                                                                                                                                         

 

     [CLICK on underlined categories to redirect]                                                    Next Page►

-4-

 

Key to the Genera of Omaliinae

 

1. Last segment of maxillary palpus very slender, less than one-half the length of penultimate,

    not longer than width of penultimate (Coryphiini).  Last segment of maxillary palpus usually

    not narrower than penultimate, always longer than width of penultimate. . . . . . . . . . . . . . .. 8

 

2(1). Pronotum longer than wide . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... ..Boreaphilus Sahlberg

 

        Pronotum not longer than wide . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . .3

 

3 (2). Head without nuchal constriction. . . . . . . . ... .. . .... . . . . . .  . . . . . . . . . . . Haida Keen

 

        Head with nuchal constriction. . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... 4

 

4(3). Head wider than pronotum. . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . 5

 

       Head not wider than pronotum . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ...6

 

5(4). Sides of pronotum serrulate... . . . ... . . . . ... .. . ... . . . ... .. . .... . ... .Ephilinus Cockerell

 

        Sides of pronotum entire. . . . . . . . . . . ... .. . .. . . . . . . . . . . . . . . . Occiephilinus Hatch

 

6(4). Eyes about as prominent as tempora . . .. . . . . . . . ... .. . ... . . .... ... .. ..Subhaida Hatch

 

        Eyes more prominent than tempora . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... 7

 

7(6). Sides of pronotum angulate at middle.. ... .. . ... .. . ... . . . ... .. .. .Eudectus Redtenbacher

 

- Sides of pronotum not angulate at middle. . . . . . . . . ... .. . ... . . . ...  . . . Pseudohaida Hatch

 

8(1). Tarsus with the first four segments wider than fifth and with long hairs beneath; head

        without nuchal constriction; pronotum usually densely reticulate. . . . . . . . . (Eusphalerini)

        ... . . . ... .. . ... . . . ... . . . ... .. . ... . . . ... . . . ... .. . ... . . . ... . . . . Eusphalerum Kraatz

 

       Tarsus with the first four segments not wider than fifth, usually without long hairs beneath .          

      . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . .9

 

9(8). Last segment of posterior tarsus shorter than first four together; segment two to four

       usually decreasing in length. . . . . ... .. . ...  . (Anthophagini)- . . . ... .. . ... . . . ... .. . ... 10

 

       Last segment of posterior tarsus as long as or longer than first four together, first four 

       segments subequal in length. . . . . . . . ... .. . ...  . (Omaliini)- . . . ... .. . ... . . . ... .. . ... 32

 

10(9). First segment of posterior tarsus about as long as, or longer than last segment. . . ... . 11

 

         First segment of posterior tarsus shorter than last segment. . . . . . . . . . ... .. . ... . . . . 16

 

11 (10). Last segment of maxillary palpus not more than twice as long as penultimate . . . ... .12

 

            Last segment of maxillary palpus more than twice as long as penultimate. . . ... .. .   14

 

12(11).Last segment of maxillary palpus not distinctly narrower than penultimate . . . ... .. . ...13

 

          Last segment of maxillary palpus distinctly narrower than penultimate .. . ... . . . ... ..

         .. . ... . . . ... .. .. . ... . . . ... .. .. . ... . . . ... .. .. . ... . . . ... .. .. . ... . . Orobanus LeConte

 

13(12). Penultimate tarsomere bilobed . . . ... .. . ... . . . ... .. . ... . . . ... .Pelecomalium Casey

 

           Penultimate tarsomere not bilobed . . . . . ... .. .. . . . . . . . . . . . . Amphichroum Kraatz

 

14(11). Head with impressed nuchal line . . . . . ... .  . . . . . . . . . . . . . . . . . . . . Unamis Casey

 

           Head without nuchal line . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . ... .15

 

15(14). Head with a pair of ocelli between eyes. .. . . . ... .. . ...  .  . .Phlaeopterus Motschulsky

 

           Head without ocelli. . . ... .. . ... . . . ... .. . ... . . . ... .. . ... . . . .. .. . ... . . Vellica Casey

 

16 (10). Last segment of maxillary palpus narrower than apex of penultimate. . .  .. . ... . . .    17

 

- Last segment of maxillary palpus not narrower than apex of penultimate. . . ... .. . .. . . ...     18