Key to Exoprosopa species

The Bee Flies (Diptera: Bombyliidae) of Ontario, with a Key to the Species of Eastern Canada
CJAI 06 March 06, 2008
doi: 10.3752/cjai.2008.06

Joel H. Kits* , Stephen A. Marshall* , and Neal L. Evenhuis**

* Department of Environmental Biology, University of Guelph, 50 Stone
Rd. E., Guelph, Ontario N1G 2W1, Canada jkits@uoguelph.ca, samarsha@uoguelph.ca

** Department of Natural Sciences, Bishop Museum, 1525 Bernice Street,
Honolulu, Hawaii 96817, USA neale@bishopmuseum.org

7. Key to the Exoprosopa species of Ontario and eastern Canada

Most recorded larval hosts in the genus are aculeate wasps. One of the Ontario species (E. fasciata) has been recorded as a parasitoid of larval Phyllophaga sp. (Scarabaeidae – June beetles); another (E. fascipennis) has been recorded as a hyperparasitoid on tiphiid parasitoids of Phyllophaga sp.

1.	Wing entirely smoky brown, darker along veins (Figure 64a). Face nearly round, proboscis relatively long (Figure 40a)	fasciata
	13-18 mm. Southwestern Ontario, north to Barrie (also eastern U.S. west to Wyoming and New Mexico). Adults fly July – Sept.
-	Wing dark brown with clear bands and spots (Figure 64c-d). Face conical, proboscis short (Figure 40b)	2

2.	Clear area at tip of wing reaching into cells r1, r5 and the basal part of r2+3 (Figure 64d). Abdominal segment 4 with a band of white tomentum (Figure 41a)	fascipennis
	5-14 mm. In Ontario found south of the Canadian Shield (Canada south through central and eastern U.S.; also Cuba). Adults fly mid June – early Sept.
-	Clear area at tip of wing restricted to cell r4 and the distal part of cell r2+3 (Figure 64b,c). Abdominal segment 4 not distinctly banded (Figure 41b,c)	3

3.	Wing with basal band clear and distinct (Figure 64b); extensive white tomentum on abdomen including a band at base of tergite 2 (Figure 41b)	dorcadion
	10-12 mm. Northern Ontario south to northern Bruce Peninsula (widespread from Canada south to Mexico). Adults recorded in July.
-	Wing with basal band brownish and poorly defined (Figure 64c); white tomentum on abdomen restricted to small spots (Figure 41c)	decora
	10-15 mm. Southern Ontario, north to Spanish (widespread Canada and U.S.). Adults fly late June – Aug.

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