This little Carcelia-like tachinid stood out from the rest of the Carcelia and Houghia spp. because the dusting was very different and the humeral callus had bristles arranged in a line. I have made a slightly tentative identification of Argyrochaetona sp. because it runs very well to this genus in Monty’s key (even up to ...
This is a Neobrachelia sp. – the colours have come out a little bit too green in the photos – the dusting is really yellowish-grey. Det: Monty Wood, 2010.
This is a specimen of Pseudochaeta – a Carcelia-type tachinid but with a row of strong facial-ridge bristles.
These quite large (>1cm) phasiines are obviously in the tribe Trichopodini but they only have small leaf-shaped hairs on the hind tibiae. Det: Monty Wood, 2010.
As the name suggests these are dexiines that look remarkably similar to relatives of Sturmia, such as Winthemia. However these are clearly not Winthemia because they have a very plumose arista. Det: Monty Wood, 2010.
These are 2 Siphosturmia spp. The first looks very like a Winthemia but on closer examination is has 4 katepisternal bristles, not 2. EDIT (05/10/2010): I am a little suspicious about the second specimen – I think I might have written the wrong name down because the humeral callus has a triangle of bristles, and ...
The Pseudosiphona look superficially like a Siphona but with a much shorter labrum. You should also be able to just make out the strong ventral bristle on the katepisternum. Det: Monty Wood, 2010.
Pseudochaeta is another of the Carcelia-type tachinids, with large eyes, but it also lacks the tuft of hairs on the hind coxa, present on Carcelia. It also has a strong row of facial-ridge bristles. EDIT (09/10/2010): I have found a second specimen virtually identical to this one from Peru. Det: Monty Wood, 2010.
Here are a few more Carcelia-like tachinids but this time belonging to the genus Houghia, which lacks the tuft of hairs on the hind coxa: Det: Monty Wood, 2010.
Here I just wanted to show you how Chrysoexorista spp. loose their colour almost over night. This first photos show how the Chrysoexorista looked a few hours after it had been removed from the malaise trap alcohol and the last 3 show how it looks now:
As you might expect, the siphonines are well represented in the neotropics and familiar genera, like Siphona, Actia and Ceromya can be found. The group is quite easy to determine from the small size, hairy r4+5 (often also r1 and cu) and long, converging or parallel subapical scutellar bristles. Beyond that Monty’s key splits the ...
The genus Carcelia seems to be fairly ubiquitous around the world. The presence of the extremely deep eyes and very narrow strip of gena (the eye is at least 11x bigger than the gena) and the presence of a tuft of small hairs on the hind coxa is very distinctive. In the following photos the ...
This is quite a distinctive and very common taxon in the peruvian samples. The fly has a clear dusting pattern and the tip of the abdomen is laterally compressed and knife-like. Det: Monty Wood, 2010.
This genus is primarily a parasitoid of orthopterans. Det: Monty Wood, 2010.
One of the commonest phasiine genera – note the strong divergent lateral scutellars. Determination by Monty Wood.