Diptera.info

Posted by Stephen on 01-11-2006 23:02

I photographed the first fly shown here in July. It was attracted to lights. Sylvicola sp. female? On the sex, I am going on the eyes when compared with the other fly on this page.

Location: West Virginia USA, open area but near woodlands.

Posted by Stephen on 01-11-2006 23:04

This is the first of three photos taken on 30 October. They are of two individuals.

Is this the same species as the one above? Another female I think.

Edited by Stephen on 01-11-2006 23:53

Posted by Stephen on 01-11-2006 23:07

Here is a lateral view of an October 30th Sylvicola sp. I think this one is male, but correct me if I am wrong. I will also post a dorsal view of one of these flies with the eyes large and touching.

Edited by Stephen on 01-11-2006 23:14

Posted by Stephen on 01-11-2006 23:47

Okay, here is the one I think is a male, comparing the eyes with the two photos at the top of the page.

So to summarize, the very first image on this page is from July, while all the others are from 30 October.

All Sylvicola sp.? Are they all the same species? And this fourth image, with the eyes close together, is a male, while the two at the top of the page are females? (I think the lateral view is of the same individual as in this fourth photo, and that means the lateral view shows a male.)

Posted by Paul Beuk on 02-11-2006 08:23

I think you are right when it comes to the females and males. About species I could not tell. Wing markinghs are similar enough for them to be all the same species but on the other hand, in the Palaearctic we have related species that can only be separated on characters in the genitalia. I have too little knowledge about the Nearctic fauna.