151a (148b).    Prosternum with a groove to receive proboscis; proboscis with 3
segments 
(Figs.A-B) (general
predators)......................…................….....(Hemiptera / Heteroptera)  Reduviidae
 
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                               A                                                         B
 
 
151b.    Prosternum without a groove; proboscis usually with 4 segments
(Figs.A-C) (general
             predators)..............................................................................…….......(Hemiptera/ Heteroptera)  Nabidae
 
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                                              A                                                              B                              C