Tuesday
Jul202010

Muscid Fly

A close relative of the house fly: Musca autumnalis (Diptera: Muscidae, order Diptera).  This is a male; females have a noticable gap on between their eyes, they have bolder black and white stripes on the thorax, and they have no orange patches on the sides of the abdomen.

Photo taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-07-13.

Monday
Jul192010

Lauxaniid Fly

An orange Lauxaniid fly, probably a Sapromyza sp, possibly Sapromyza sexpunctata (Diptera: Lauxaniidae), based on the three black spots visible on the near-side of the abdomen.

Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-07-13.

Sunday
Jul182010

Two More Species of Thistle Gall Fly

On a thistle (Cirsium sp) in one of the few remaining areas of grassland that hasn't been mown yet: gall fly Anomoia purmunda (Diptera: Tephritidae). When I first saw it, I thought it was two aphids standing on the back of a fly, and was quite surprised when the whole 'assemblage' flew off as a single unit. 

A few metres away I came across the following, also on a thistle:

Probably Terellia ruficauda (Diptera: Tephritidae).

Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-07-11.

Saturday
Jul172010

Beetle Larvae and Eggs

Larvae and eggs of the green dock beetle, Gastrophysa viridula (Coleoptera: Chrysomelidae).  Identification based on photos here and here.  The larvae are demolishing this leaf so effectively that I don't think the larvae still in the eggs will find any left when they hatch out.  For photos of the adults that I took last year, see here and here.

Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-06-15 and 2010-06-19, respectively.

Friday
Jul162010

And Another Species of Knapweed Gall Fly

On the same stand of knapweed that I have, in the past month, seen Urophora jaceana and Urophora stylata, we now have Urophora quadrifasciata (Diptera: Tephritidae).

The number and variety of Tephritidae this year has been quite spectacular, at least compared with last year.  But, unfortunately, the stand of knapweed in the Wilderness has now been mown, so it might be a while before I come across any more new species there.

Photos taken in the Wilderness, Whiteknights Park, Reading University grounds, Reading, UK, on 2010-07-06.