Summary of Hylaeus sparsus plants use, with notes for others.

[Sam Droege]

All

I would like to extend thanks to everyone for sending in their information about H. sparsus, H. georgica, H. floridanus.  Additional information would be  welcomed.

Here is a quick summary of the plants used by gender for each state submitting information.  Most of the females were recorded on a spring Apiaceae genus, the primary exception being  the 4 specimens from Texas (thanks for ruining the party Jack!) none of which were.  Males were more catholic and used a wider range of plants with a focus on Apiaceae.  H. floridanus and H. georgica did not seem to have a pattern, but a place to look for these species would appear to be Salix. The later 2 species clearly need more life history work...as does H. sparsus, but it, at least, has gotten a bit of attention.

So, my leaning, despite the TX results, would be to define H. sparsus as an Apiaceae species.  The pattern appears to be quite consistent.  I did find a reference (I think an unpublished manuscript) from Snelling indicating that he thought the TX specimens looked different in the maculation department...for what that is worth.

H. sparsus

MO female, Taenidia
MO female, Sanicula
MO female, Osmorhiza
MO female, Zizia
DE male, Zizia
DE male, Salix
PA unknown, Zizia
PA unknown, Osmorhiza
TX female, Salix
TX female, Phacelia
TX male, Crataegus
TX male, Salix
Eastern U.S. unknown, Thaspium
Eastern U.S. unknown, Zizia
IL Plants noted by Robertson (weighted towards Apiaceae...)
https://www.illinoiswildflowers.info/flower_insects/insects/bees/hylaeus_sparsa.htm
OH unknown, Phacelia (but with Osmorhiza mixed in)
OH male, Zizia
OH female, Zizia
OH male, Osmorhiza
OH female, Osmorhiza
MI male, Ranunculus
GA, female, Apiaceae

MD, female, Zizia

MD, male, Zizia

MD, female, Malaise

VA, male, blue vane

PA, bowl trap

H. floridanus
DE female bowl barrier dune
DE male unknown plants fall
TX unknown, Salix/Ilex in spring composites in fall
AR/MS female, Malaise trap
AR/MS male, Malaise trap
AR/MS male, Warner trap

H. georgica
DE male Salix
TX unknown, primarily Salix, Crataegus, Viburnum, Nemophila
Eastern U.S. male Packera
LA female, Malaise trap
MS male, Photinia

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[Lillie Gibb]

I have one record of a male H.floridanus from southeast Mississippi in October and it was netted off of Solidago altissima. 

It’s only one record, but I hope it’s helpful.

Lillie Gibb

Volunteer

Mississippi Entomological Museum

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