Pel / oloma

Vockeroth J. R., 1973, Some New or uncommon Syrphini (Diptera: Syrphidae) from Southern Africa, Annals Natal Mus. 21.3.595 - 607. pdf 21 (3), pp. 595-607 : 597

hairs

.

Metasternum

bare

.

Hind

coxa

with

posteromedan

apical

tuft

of

hairs

.

Wing

shape

and

venation

normal

;

wing

with

rather

extensive

bare

areas

on

basal

2/3

.

Femora

rather

stout

,

especially

the

posterior

pair

.

Abdomen

(

fig

.

19

,

h

)

broadly

oval

,

nearly

flat

,

with

moderately

broad

distinct

margin

from

near

apex

of

tergite

2

to

apex

of

tergite

5

.

Tergites

shining

,

mostly

yellow-orange

,

with

black

markings

as

figured

.

Tergite

5

and

sternite

5

of

male

extremely

short

.

Sternites

mostly

yellow

orange

.

Male

terminalia

(

fig

.

la-e

)

.

Tergite

9

reduced

,

short

;

cercal

notch

very

broad

and

shal­

low

.

Surstylus

attached

along

most

of

posteroventral

margin

of

tergite

9

,

broad

basally

,

then

strongly

narrowed

and

continued

posteroventrad

as

a

long

slender

process

which

tapers

to

a

slightly

curved

apex

,

with

a

few

short

hairs

near

base

.

Sternite

9

very

long

,

posterior

end

deep

,

posterior

margin

nearly

straight

,

posteroventral

emargination

very

shallow

and

with

a

short

deeply-divided

lingula

.

Superior

lobe

articulated

just

below

posterodorsal

angle

of

sternite

9

,

short

but

extending

ventrad

to

lower

margin

of

sternite

,

the

dorsal

portion

compressed

,

the

ventral

portion

broadened

and

rather

strongly

depressed

,

the

lateral

margin

extended

into

a

triangular

and

narrower

bluntly-rounded

process

,

the

median

margin

broadly

rounded

and

with

a

single

marginal

hair

,

the

apex

curved

slightly

caudad

.

Aedeagus

one-segmented

,

rather

strongly

sclerotized

throughout

,

in

lateral

view

subtriangular

with

apex

subtruncate

,

broad

anterodorsally

,

mostly

moderately

compressed

and

with

extreme

apex

strongly

compressed

,

with

a

strong

emargination

in

anterior

margin

,

and

with

a

pair

of

thin

diagonal

lateral

flanges

beginning

on

median

third

of

dorsal

surface

and

extending

anteroventrad

.

Aedeagal

apodome

very

large

,

occupying

most

of

cavity

of

sternite

9

,

the

anterior

half

a

single

strongly

compressed

plate

,

the

posterior

half

hollow

,

of

two

divergent

plates

joined

anteriorly

and

dorsally

but

broadly

separated

posteriorly

and

ventrally

,

Ejaculatory

apodeme

large

,

elongate-triangular

,

strongly

compressed

except

at

narrow

posterior

end

where

it

is

abruptly

broadened

and

transverse

,

the

transverse

portion

ending

on

each

side

in

a

heavily

sclerotized

knob

.

Distribution

.

Cape

Province

,

South

Africa

.

Discussion

.

The

genus

Pel / oloma

is

here

referred

to

the

Syrphini

although

it

is

possible

that

it

should

be

included

in

the

tribe

Melanostomini

.

The

entirely

black

face

and

scutellum

are

characters

found

consistently

in

the

Melanostomi

.

They

occur

in

no

other

Syrphini

known

to

me

although