No Common Name Laphria grossa (Fabricius, 1775)  
Kingdom Animalia   >   Phylum Arthropoda   >   Class Insecta   >   Order Diptera   >   Family Asilidae   >   Genus Laphria   

Status:

This impressive species is among the largest robber flies in North America by weight, although large, elongate asilid species may exceed its body length of 23-35 mm (Bromley 1934). Laphria grossa flies with a very audible loud buzz, and resembles a queen bumblebee in flight. It tends to frequent hardwood forest, and males often take up perches on vegetation adjacent to a large log or stump, especially oak or elm. Like most Laphria, L. grossa is active as an adult primarily in early to mid-summer.

There are 12 records in the project database.

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GAAL WA FRCL MO HO BA BC HA CEPGAA CV CHSMKEQACNTADOWISOWO
Laphria grossa in Baltimore City, Maryland (7/15/2008). Determined by Ben Coulter and Herschel Raney/BugGuide. Photo by Thomas Wilson. (MBP list)

A Laphria grossa in Harford Co., Maryland (6/20/2016). Determined by Ben Coulter/BugGuide. Photo by Shannon Schade. (MBP list)

A male Laphria grossa in Anne Arundel Co., Maryland (7/7/2011). Determined by Norman and Cheryl Lavers/BugGuide. Photo by Bill Johnson. (MBP list)

A male Laphria grossa in Anne Arundel Co., Maryland (7/7/2011). Determined by Norman and Cheryl Lavers/BugGuide. Photo by Bill Johnson. (MBP list)

Laphria grossa in Carroll Co., Maryland (6/25/2011). Determined by Herschel Raney/BugGuide. Photo by Bill Johnson. (MBP list)

A Laphria grossa in Montgomery Co., Maryland (6/22/2019). Determined by Ken Wolgemuth and Ben Coulter via BugGuide. Photo by Jim Moore. (MBP list)

Laphria grossa in Allegany Co., Maryland (7/9/2006). Photo by Steve Collins. (MBP list)

A Laphria grossa in Howard Co., Maryland (7/17/2019). Photo by Bonnie Ott. (MBP list)

Laphria grossa in Ashland Co., Ohio (7/25/2012). Photo by Jay Cossey. (MBP list)

A Laphria grossa in Calvert Co., Maryland (6/30/2017). Photo by Ben Springer. (MBP list)

Laphria grossa in Baltimore City, Maryland (6/18/2014). Photo by Thomas Wilson. (MBP list)


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