True Flies  (Brachycera - 1)
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Asilidae                              Laphria thoracica                           Robber Fly
Catoctin Mountain Park
Frederick County, Maryland
June 7, 2009
Photographer:  Richard Orr
Asilidae                              Laphria sericea                              Robber Fly
Little Island Pond, Catoctin Mountains
Frederick County, Maryland
June 11, 2006
Photographer:  Richard Orr
Syrphidae-Syrphinae-Bracchini                                              Syrphid Fly
on Salt Marsh Aster
Assateague Island National Seashore
Worcester County, Maryland
September 21, 2006
Photographer:  Richard Orr
Syrphidae                           Eristalis tenax                                Rat-tailed Maggot Fly
FBI Pond, Catoctin Mountains
Frederick County, Maryland
September 4, 2006
Photographer:  Richard Orr
Syrphidae                            Platycheirus sp.                            Syrphid Fly
Howard County, Maryland
June 25, 2006
Photographer:  ZoAnn Lapinsky                                              
Tachinidae                         Archytas sp.                                   Tachinid Fly
Columbia
Howard County, Maryland
August 21, 2006
Photographer:  Richard Orr                
Tachinidae                        Gonia sp.                                           Tachinid Fly
Fly was chasing a Bumble Bee -- Bombus impatiens Queen
Cummingham Falls State Park
Frederick County, Maryland
May 6, 2007
Photographer:  Richard Orr
Syrphidae                           Mallota sp. prob. posticata          Syrphid Fly
Mimic of a Bumble Bee
Sugar Loaf Mountain
Frederick County, Maryland
May 25, 2007
Photographer:  Richard Orr
Syrphidae                           Mollota sp.                                       Syrphid Fly
Catcotin Mountain Park
Frederick County, Maryland
June 7, 2009
Photographer:  Richard Orr
Asilidae                               Efferia sp. (male)                            Robber Fly
Assateague Island National Seashore
Worcester County, Maryland
June 6, 2007
Photographer:  ZoAnn Lapinsky                                              
Asilidae                               Efferia sp. (female)                            Robber Fly
Muscidae (being eaten)  Stomoxys calcitrans                         Stable Fly
Assateague Island National Seashore
Worcester County, Maryland
June 6, 2007
Photographer:  ZoAnn Lapinsky                                             
Muscidae                           Musca domestica                           House Fly
Assateague Island National Seashore
Worcester County, Maryland
June 7, 2007
Photographer:  ZoAnn Lapinsky                                             
Asilidae                               Efferia aestuans (male)                     Robber Fly
Syrphidae (being eaten) Ocyptamus fascipennis                    Syrphid Fly
Mt. Pleasant
Howard County, Maryland
August 11, 2007
Photographer:  Richard Orr
Syrphidae                            Eristalis transversa                      Transverse Flower Fly  
Assateague Island National Seashore
Worcester County, Maryland
October 8, 2007
Photographer:  ZoAnn Lapinsky                                              
Uldiidae                              Delphinia picta                           Picture-winged Fly
Wilde Lake environs
Howard County, Maryland
August 23, 2008
Photographer:  Richard Orr
Asilidae (mating)              Promachus rufipes                        Robber Fly
Old Womans Run
Charles County, Maryland
August 31, 2008
Photographer:  Richard Orr
Asilidae                              Laphria affinus                                 Robber Fly
Piney Branch Bog environs
Charles County, Maryland
September 19, 2008
Photographer:  Richard Orr
Syrphidae                           Eristalis dimidiata                          Syrphid Fly
Piney Branch Bog environs
Charles County, Maryland
September 19, 2008
Photographer:  Richard Orr
Tachinidae                         Pararchytas decisus or near        Tachinid Fly
Mt. Pleasant (Howard County Conservancy)
Howard County, Maryland
September 21, 2008
Photographer:  Richard Orr
Asilidae                              Laphria sericea/aktis complex      Robber Fly
Catoctin Mountain National Park
Frederick County, Maryland
May 24, 2009
Photographer:  Richard Orr
Syrphidae                          Spilomyia longicornis                    Syrphid Fly
David Force Park
Howard County, Maryland
September 4, 2010
Photographer:  Bonnie Ott
Uldiidae                              Tritoxa flexa                                Black Onion Fly
Potomac River
Washington County, Maryland
June 7, 2011
Photographer:  Richard Orr
Asilidae                              Diogmites sp.                                       Hanging Thief
Cove Point LNG Property
Calvert County, Maryland
July 24, 2011
Photographer:  Richard Orr   
Tachnidae                         Trichopoda pennipes                     Tachinid Fly
Lake Elkhorn Environs
Howard County, Maryland
September 3, 2011
Photographer:  Richard Orr
Tachnidae                         Zelia species                                   Tachinid Fly
Middle Patuxent Environmental Area
Howard County, Maryland
September 3, 2011
Photographer:  Bonnie Ott