Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae)
Author
Steenis, Jeroen Van
C7F0D01C-B182-4B93-AF73-E4154367B535
Research Associate, Naturalis Biodiversity Center, Leiden; Hof der Toekomst 48, 3823 HX Amersfoort, the Netherlands.
jvansteenis@syrphidaeintrees.com
Author
Hippa, Heikki
546524AD-3BD1-4830-842F-EEEE7DF4799B
Zoological Museum, Biodiversity Unit, FI- 20014 University of Turku, Finland.
heikki.hippa@gmail.com
Author
Mutin, Valeri A.
625E0F27-4538-417D-9155-6141947F04EA
Amur State University of Humanities and Pedagogy, Komsomolsk-na-Amure, 681000, Russia.
valerimutin@mail.ru
text
European Journal of Taxonomy
2018
2018-12-20
489
1
198
journal article
22082
10.5852/ejt.2018.489
79a76a5f-97b3-47cc-9bff-086a712cf3e2
3830537
B234C53F-BB56-4F3D-B400-F214E19DCF90
Sphegina
(
Asiosphegina
)
asciiformis
Brunetti, 1915
Sphegina asciiformis
Brunetti, 1915: 223
. Type locality: Darjiling,
India
(
holotype
,
♀
, NZSI).
Differential diagnosis
See under the Remarks below.
Material examined
Holotype
INDIA
•
♀
; “Ind. Mus. /
Darjiling
/ alt.
7000 ft.
/ 29–V–[19]10 /
Brunetti
”; “
TYPE
”; “
Sphegina
/
asciiformis
/
Brun
Type
♀
/ det Brun. 1923”; “9758 / 112”; “
Sphegina asciiformis
Brun
” [handwritten]; “
Zoological Survey of India
/ [barcode] /
ZSI0000004488
”; photos of the specimen in lateral and dorsal view studied; the specimen is in bad condition: antennae, left wing, protarsi, meso- and metalegs missing;
ZSI
.
Description
(see also
Brunetti 1915
,
1923
)
Female
LENGTH. Body
4 mm
, wing
4 mm
.
HEAD. Face in lateral view concave, weakly projected antero-ventrally; frontal prominence weakly developed. Face black, light grey pollinose. Hypostomal bridge black. Gena black, mouth edge redbrown with large triangular non-pollinose shiny area. Frons and vertex black, predominantly grey pollinose, a rather wide semi-circular area posterior of lunula non-pollinose and shiny. Occiput black, light grey pollinose. Antenna brown to black; arista long.
THORAX. Colour dark brown to black, weakly greyish pollinose, with denser grey pollinose vitta submedially; pleuron with greyish pollinosity and white pile. Scutellum semi-circular, black, shiny.
WING. Entirely hyaline, stigma yellowish. Crossvein dm-cu meeting vein M obliquely and vein M
1
meeting vein R
4+5
perpendicularly.
LEGS. Pro- and mesoleg yellow. Metafemur black and yellow biannulate, incrassate; metatibia black and yellow biannulate; metatarsus entirely black, basitarsomere thick.
ABDOMEN. Terga black; pile very short and white; tergum II strongly constricted anteriorly and relatively short, about twice as long as tergum I and about 1.5 times as long as each of terga III and IV.
Male
Unknown.
Remarks
Only the
holotype
female of
Sphegina (Asiosphegina) asciiformis
from Darjeeling,
India
, is known. By the hyaline wing, oblique vein dm-cu and the short tergum II this species recalls
Sphegina (Asiosphegina) apicalis
,
S
.
(A
.
) farinosa
sp. nov.
and
S. (A.) nubicola
sp. nov.
, but differs by the entirely yellow pro- and mesolegs (in all others at least tarsomeres 4 and 5 of pro- and mesotarsus black) and by the entirely black abdomen.