Some Neotropical Siphonini

Some Neotropical Siphonini
Today I went through some of the specimens in my World collection that had been labelled under the siphonine genera (Actia, Borgmeiermyia, Ceromya, Pseudosiphona etc.). Here are some photos: The Erythomelana is only “possibly” at the moment … it keys to that but I have never seen the genus so I have asked Monty Wood ...

Pseudosiphona sp. (Surinam)

Pseudosiphona sp. (Surinam)
Pseudosiphona is a very common genus in the neotropics – in these photos you can see the small labellum (much shorter than in Siphona) and the katepisternal bristle arrangement (with the strong lower bristle close to the posteroventral edge) typical of this genus.

Pseudosiphona sp. (French Guiana)

Pseudosiphona sp. (French Guiana)
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.

Ceromya sp. (French Guiana)

Ceromya sp. (French Guiana)
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 ...

a genus close to Borgmeiermyia (French Guiana)

a genus close to Borgmeiermyia (French Guiana)
Det: Monty Wood, 2010

fg-taxon #63 (close to Borgmeiermyia sp.)

(photographs to follow) At first glance just a small, black & grey-dusted tachinid but this taxon has hidden depth. The most distinctive feature when sorting is the orange coxae on all legs – a quite unusual feature. The male genitalia are also quite easy to spot, being quite rounded & hairy often with some orange-colouration. ...

fg-taxon #52 (Borgmeiermyia sp.)

fg-taxon #52 (Borgmeiermyia sp.)
This is the other half of a pair of very similar taxa (see also fg-taxon #53). This one has a much longer antennal segment 3 and less thoracic dusting. And here is a rather spectacular specimen, which is presumed to be the female of this taxon. Note the swollen fore basitarsus; large piercer and opposing ...

fg-taxon #53 (Borgmeiermyia sp.)

fg-taxon #53 (Borgmeiermyia sp.)
This is one of a pair of very similar taxa (the other is fg-taxon #52) – very small in size (3-5mm), with black body, orange legs and plain wings. This taxon has a shorter antennal segment 3 and a little more dusting. EDIT (Monty Wood 26/9/2010): This is a Borgmeiermyia sp. – but not one ...

Borgmeiermyia brasiliana (fg-taxon #11, ‘feather-face’ #2) 3

Borgmeiermyia brasiliana (fg-taxon #11, 'feather-face' #2)
This is a male of the second taxon to exhibit the highly modified antenna-3, shaped like a feather. All specimens of this taxon are between 4-5mm long and so the photographs are of quite low resolution. However, you should be able to see: the distinctive black body with golden dusting pattern; completely orange legs; slightly shaded ...