And the animals I've trapped

I've not managed a day out beetling for a couple of months and was starting to get withdrawal symptoms. The garden compost heaps and light traps haven't been delivering much beyond the usual suspects and so the opportunity this week to visit a Breckland site in north Suffolk was too good to miss. 

Wednesday was really warm and sunny and I stupidly hadn't packed any sunscreen. Who needs that in late September, I said to myself whilst packing my gear. I did have a hat which averted the worst effects but by the end of the day I certainly felt that I had overdone it on 'the rays'.   

The site was a mixture of habitats. Some typical grazed and rabbit strewn Breckland heath with areas of different ages and vegetation type. The numerous large stones meant lots of crawling around on hands and knees and flipping these over in order to spy the carabids associated with this habitat. The vacuum sampler also got an outing and was employed frequently, delivering the best beetle of the day. There was also some water features, which whilst mainly steeped banked (and so less good for beetles) did have the occasional less steep, sandy margin which provided a few wetland beetles.

It was reasonably hard going at the total list won't be massive but there were numbers of ground beetles, 3 or 4 species of Calathus (need to check the melanocephalus/cinctus to be doubly sure).  Calathus ambiguus was a new species for me and I initially mis-IDd thus as C. mollis but the shape of the pronotum is different with sharper corners and a straighter hind edge.  

I was pleased to see the ground beetle-like tenebrioid Crypticus quisquilius again. I've only recorded this once before from a site in coastal Essex back in 2016.

There were lots of Harpalus pumilus hiding under the stones in areas with more bare ground and less developed vegetation. I must have found 15-20 of these during the course of the day, easily identified in the field on their small size and pale appendages.

 

Another new species for me was the weevil Trachyphloeus scabriculus a rather scrutty looking thing with bent antenna and spatula-like erect scales on the elytra. Not hugely common but locally common in the Brecks and found at the base of plants.

The aforementioned sandy water margins yielded around ten individuals of the weird carabid Omophron limbatus after a bit of liberal water splashing. Only the second time I've encountered this species after first seeing them in Norfolk earlier in the year.

However, the best beetle of the day was found in a suction sample from assorted low lying Breckland plants. When I saw it crawling around the tray I was confused, as it looked similar to an Agrilus jewel-beetle but was really tiny. My memory said that the small buprestids, like Trachys were more rounded. I had forgotten there was a genus of small ones called Aphanisticus, comprising two UK species. This one was from the more common of the two, although still pretty uncommon, A. pusillus. It apparently feeds on Black Bog-rush Schoenus nigricans, although it wasn’t  found on that here. I've only seen two other species of jewel-beetle so it was nice to finally see another.

The post title link is to the final song from Nirvana's breakthrough album, Nevermind, which was released 30 years ago this week. Where has that gone? I vividly remember it coming out and someone bringing their copy into school on vinyl to play in the sixth form common room. Whilst never a huge fan, the album has stood the test of time and still gets the occasional play in the car, especially if the kids are with me... 

And I feel, so much depends on the weather

Just like Clifden Nonpareils, everyone seems to be recording Dewick's Plusia. Both have gone from being mysterious rarities, the things of south coast migration sites to almost common place in a very short time.

However, unlike a big blue beast I had yet to see a Dewick's Plusia. That is until I opened the trap this morning and there it was sat atop an egg carton in all its plush glory.

Like a tiny stealth bomber, come to feed on yer nettles.

In a more 'traditional' pose, with its bumps all showing

I suspect it will be the first of many but I doubt I'll ever get bored of them. I wonder what the next 'winner' species is going to be...... Answers on a postcard.

Post title link comes from Stone Temple Pilots, 

Some new staphs

Crikey, September. How did that happen? The weather has turned distinctly autumnal too. Blogging has taken a bit of a back seat as other stuff keeps getting in the way.

I just wanted to post some of the new (for me) staphs that I have encountered over the last couple of months from a variety of different places.

To start with are a couple of species that I found in rotting detritus at the edge of Slapton Ley back in mid July.

First up this Paederus species, obvious from it coloring and small peg-like ends to the maxillary palps.

First bit of the key gets you to look at the hind tibia and whether the the dark area extends from the joint to about a third of the way down as opposed to being absent or present as a distinct patch. This individual had the more extensive dark area, in fact the whole tibia is pretty dark, only being ever so slightly lighter in the last third.

The next couplet compares the length and breadth of the elytra compared to the pronotum, either much linger and wider or only just so. Looking at the first image I would say that they are both obviously longer and wider. This takes you to P. fuscipes.

Luckily I had a male so was able to whip out the aedeagus to confirm

 The slightly asymmetrical aedeagus tallies and has the parameres differing slightly in length. This seems to be mainly a coastal species mainly in the south west which is why I guess I haven't encountered it before.

Next up was a species of Philonthus. 

Counting the pronotal punctures and then comparing the aedeagus had me confused. There were 5 pronotal punctures but none of the diagrams in Lott matched. I then looked at other groups of Philonthus and still nothing seemed to match. I soon got some help on Twitter. The obvious backward pointing apex of the median lobe is diagnostic of Philonthus umbratilis but is only mentioned in the text rather than illustrated. (Note to self to read more of the species descriptions in future). This species is only supposed to have 4 punctures but my specimen seems to have an extra one towards the back back of the pronotum. Looking at the rather good Devon Beetles list online it would seem to be the first record for the county since 1979.

Another day in Devon and another new Philonthus species. This was found in numbers under horse dung and I didn't even need to key it out to put a name to it. Not often I can say that about a staph. The rather lovely P. marginatus, easily identifiable by the pale sides to the pronotum.

A couple more Devon beetles but this time both from the genus Aleochara, both from under rotting seaweed and both looking a little different from the other members of this genus I more regularly encounter.

Firstly there was Aleochara obscurella. As mentioned it didn't stand out as an Aleochara and I failed to run it through the key to genus, so ended up picture matching the aedeagus which was really distinct with what looked like a 'cock and balls' attached, but I can attest that it isn't described that way in the literature! 

Am I just seeing things?

Once I had worked out the above was a Aleochara, the next one fell much more easily into place and was the more commonly encountered (I think) A. grisea. I had collected a few individuals of each species so as to maximise the chances of getting a male and all the grisea were noticeably smaller than the obscurella. 

 

The next species was a by-product of some tidying. Over the last couple of years Pellitory-of-the-wall seems to have become the default plant of pavement cracks and unattended brickwork in our village. It's everywhere. It really gets into the mortar and so I was clearing it from the front of the house when a tiny staph popped out and made a run for it. Luckily I had a pot to hand. Turned out to be Sunius melanocephalus and the second of this genus to be found in the garden. 

Finally, for now. One more species of Philonthus. This one was found last weekend during a family walk in North Norfolk. I had stopped to poke at some cow dung much to everyone's annoyance and grabbed a single Philonthus, fully expecting it to be one of the common ones, but no. I was faced with a asymmetric paramere which nicely matched the images both in the book and online of P. parvicornis. Not too many records on NBN and according to the book - 'habitat uncertain'. Not now it's not. This one was hunting in cow shit!!

Still my favourite beetle family by a country mile. Lucky that's there are so many more to see!