Canadian Journal of Arthropod Identification

Soldier flies of the subfamily Pachygastrinae of Canada (Diptera, Stratiomyidae)

CJAI 42 -- December 4, 2020

Linley M. Sherin

| Abstract | Introduction | Materials & Methods | Checklist | Species Key | Results | Acknowledgments | References | PDF | Cite | Appendix |
  Materials & Methods

Species included in this key are those previously known from Canada (Woodley 2001) as well as new Canadian records reported from specimen data for the first time (Table 1).

Specimen data were obtained from the University of Guelph Insect Collection (DEBU, Guelph, Ontario), the Biodiversity Institute of Ontario (BOLD, Guelph, Ontario), the Canadian National Collection of Insects, Arachnids and Nematodes (CNC, Ottawa, Ontario), the Lyman Entomological Museum (LEMQ, Montréal, Quebéc), the Ouellet-Robert Entomological Collection (QMOR, Montréal, Quebéc), the Spencer Entomological Collection (UBCZ, Vancouver, British Columbia) and the online platform iNaturalist [accessed 2020 October 17].

The following collections were also examined but held no Canadian Pachygastrinae: the Royal Ontario Museum (ROM, Toronto, Ontario), the Royal British Columbia Museum (RBCM, Victoria, British Columbia), the Cornell University Insect Collection (CUIC, Ithaca, New York, USA), as well as the online platform BugGuide ( [accessed 2020 October 17].

Terminology used follows Cumming and Wood (2017). Data included within species pages were taken from specimen label data unless otherwise cited. Labels without GPS coordinates for locality data had coordinates generated retroactively using Google Maps GPS Coordinates ( Distribution maps were created using the online software SimpleMappr (Shorthouse 2010). Previous Canadian distribution data were taken from literature (Woodley 2001) and mapped using whole provinces to indicate the presence of a species. This does not imply distribution throughout the entire highlighted regions. Canadian collection localities for the examined specimens were included in the distribution map as point data. For brevity, the term “provincial” is used when describing both provincial and territorial records throughout this manuscript and the provided key.

Specimen photographs were taken using a Canon DSLR mounted on a Stackshot rail and operated using Helicon Remote. Photographs were then stacked using Helicon Focus and edited using Adobe Photoshop. All specimen photographs were taken and edited by the author unless otherwise indicated. Photographs of living flies are from multiple sources; credit is given below each photograph.

Table 1. Checklist of Canadian Pachygastrinae arranged from west to east, by province and then territory: BC, British Columbia; AB, Alberta; SK, Saskatchewan; MB, Manitoba; ON, Ontario; QC, Quebec; NB, New Brunswick; NS, Nova Scotia; PE, Prince Edward Island; NL, Newfoundland and Labrador; YT, Yukon; NT, the Northwest Territories; NU, Nunavut. *New provincial record. **New national record.

Berkshiria albistylum Johnson       7* 15 1*               23
Cosmariomyia pallidipennis (Williston)         1*                 1**
Eidalimus fuscus (Kraft & Cook)         8 2*               10
Gowdeyana punctifera (Malloch) 1*   1*   6* 1*               9**
Neopachygaster maculicornis (Hine)   6* 6   15* 13*               40
Neopachygaster occidentalis Kraft & Cook 1                         1
Neopachygaster reniformis Hull 5* 7* 5* 9* 25 38               89
Neopachygaster vitrea Hull         35* 18*               53**
Pachygaster pulchra Loew         8*                 8**
Zabrachia spp. Coquillett 83 22*     16 75         5* 1*   202
TOTAL SPECIMENS 90 35* 12 16* 129 148 0 0 0 0 5* 1* 0 436