Cruisers
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Stream Cruiser                                                    Didymops transversa
Patuxent Reaserch Refuge
Prince George's County, Maryland
April 20, 1996
Photographer:  Richard Orr
Illinois River Cruiser (male)                              Macromia illinoiensis illinoiensis
Potomac River
Montgomery County, Maryland
July 16, 1994
Photographer:  Richard Orr
Royal River Cruiser                                             Macromia taeniolata
Great Falls
Montgomery County, Maryland
July 10, 1994
Photographer:  Richard Orr
Georgia River Cruiser                                        Macromia illinoiensis georgina
Rock Creek Park
Washington D.C.
July 20, 2002
Photographer:  Richard Orr
Allegheny River Cruiser                                     Macromia alleghaniensis
Allegany County, Maryland
July 9, 2006
Photographer:  Steve Collins
Illinois River Cruiser (cast skin and emerging adult)    Macromia illinoiensis illinoiensis
Potomac River
Washington County, Maryland
June 17, 2012
Photographer:  Richard Orr