Yellow-faced Bees - Hylaeus affinis

Moved

Moved from Hylaeus to new species page.

… Chuck Entz, 24 September, 2006 - 9:54am

H. affinis

note yellow on scape and breadth of yellow markings above on male

… John S. Ascher, 23 September, 2006 - 4:16pm

Thank you John

Thanks for the confirmation. I'll request a new guide page.
Cheers,

… Jackie, 24 September, 2006 - 9:10am

Thanks Adalbert

We have only H. affinis, mesillae, mesillae cressoni and modestus here in southwestern Ontario. Here's a description for H. affinis: Black, side of face lemon yellow in the male, with triangular yellow patch in the female. Wings clear, tinged with brown, venation reddish brown and tibiae yellow basally. Tarsi reddish brown in the female, yellow in the male. Apical margins of abdominal segments brownish. Do you think it possible to get this down to species?
Cheers,

… Jackie, 11 August, 2006 - 5:43pm

H. cressoni

has a white spot in front of the dark tegula. I am not sure whether this image shows this white spot.

… Adalbert Goertz, 11 August, 2006 - 10:31pm

Hylaeus sp.

2 males, 1 female in copulo.

… Adalbert Goertz, 11 August, 2006 - 5:03pm

Thanks Adalbert

I hope this comment doesn't appear twice. I don't know what happened to the first one I sent you.
We have 4 species here in southwestern Ontario. H. affinis, mesillae, mesillae cressoni and modestus. Here's a description for affinis: Black, side of face lemon yellow in the male, with triangular yellow patch in the female. Wings clear, tinged with brown, venation reddish brown and tibiae yellow basally. Tarsi reddish brown in the female, yellow in the male. Apical margins of abdominal segments brownish. Do you think we can get this down to species level?
Cheers,

… Jackie, 11 August, 2006 - 5:46pm

Ah..ha found another clue

Male H. affinis have 1st and 2nd flagellar segments on the antennae nearly the same length. Few other Hylaeus species in this area (could mean Michigan or Ontario) share this trait. I have no idea who wrote it, (I paraphrased it - might be Mark O'Brian), but it was in my files. What is a flagellar segment?

… Jackie, 11 August, 2006 - 7:11pm