
At first glance I thought that it was some kind of beetle, then when I took a closer look at the head and antennae I guessed at some kind of hunting wasp but Michael Chinery’s Collins Guide to the Insects of Britain and Western Europe includes a clear illustration of this species; Arge cyanocrocea, a sawfly whose larvae feed on bramble. It’s about 1 centimetre in length.
In Greek mythology Arge was a huntress. ‘Cyanocrocea‘ means ‘greenish blue/yellow’ which I guess refers to the blue sheen on the thorax and the yellow abdomen. I’d assumed that the blue was just a reflection so I’ve greyed it in my drawing but I have included a red spot on the front right leg which I now realise is the red of the car seen through a raindrop. Which demonstrates the perils of drawing from a photograph!
It was raining and we were in a hurry so I took a few photographs which I decided to draw from. That’s my way of really looking at new species before I reach for the book to try to identify it. Our bright red car didn’t make the best background and I couldn’t make out the shape of the abdomen because of the dark smudge that is part of the this sawfly’s wing pattern, so I’ve added a small sketch from the illustration in the field guide to show the hidden shape. Sawflies lack a ‘wasp-waist’.

Most female sawflies have saw-like ovipositors which they use to lay their eggs in plants and most sawfly larvae resemble the caterpillars of moths and butterflies. The field guide says that Arge cyoncrocea is often seen on umbellifers and the adults are about from May to July. In 1986 it was described by Chinery as ‘fairly common but confined to the southern half of Britain’.
Horntail at Braemar

My dad suggested that we head the letter ‘HORNET?’ but the editor of the magazine was able to identify it from our description as a ‘Wood Wasp’ (which unlike the Hornet, has no wasp-waist).
The First Wildlife Talkie?
By coincidence, it was in 1960 that Gerald Thompson of the University of Oxford Forestry Department was working out how he could set about making a film of the Alder wood wasp and its parasites. This lead to him setting up the influential Oxford Scientific Films unit.
He was inspired by the work of F. Percy Smith who in 1931 made a film in the Secrets of Nature for British Gaumont Instructional Films called War in Woods, about the life of the Horntail or Conifer Wood Wasp. According to Thompson, in interviews filmed in 1998/99, this wood wasp film, narrated by Dr R. Neil Chrystal, ‘was the first science film with a soundtrack shown in the cinema’. Dr Neil was Thompson’s predecessor at what was then the Imperial Forestry Institute at the University of Oxford,
Thompson specifically refers to a special showing at the Super Cinema in Oxford so it’s not 100% clear that he considered this the first wildlife talkie ever, but that appears to be what he believed.
Royal Deeside

Links: Gerald Thompson interview at WildFilmHistory.org includes link to a PDF transcription of the interview.
Secrets of Nature; War in the Woods, 1931, at British Pathé

















I GIVE the lawn a rake with the springbok rake at this time of year to get some of the moss out of it but my new Scarifier, one of this week’s bargains at Lidl supermarket, does a much better job. The lawn is no more than 25 square metres, but I raked up this pile which is almost entirely moss. It amounted to 7 or 8 trug-loads to take to the compost bins.










