Gellia Stål, 1865
(updated 20 April 2005)
Gellia Stål,
1865: 234, 243.
Type Species:
Aelia albivittis Germar,
1838, by subsequent designation (Kirkaldy, 1909).
Tribal Placement:
Linnavuori (1982) included this genus in his
Lobopeltista group, but Ahmad & Kamaludding (1990) included it in the
Tetrodini.
Included Species:
albivittis
(Germar)
angulicollis (Stål)
bicolorata Distant
dilatata (Signoret)
fusca Ahmad & Kamaluddin
incognita Distant
kuntiae Mathew
monticola Linnavuori |
neavei Schouteden
nigripennis (Dallas)
pakistanica Ahmad & Kamaluddin
pilosa Linnvuori
punctulata Stål
rugulosa Distant
tristis Schouteden |
Comments:
Linnavuori (1982) provided a key to the African species, but did not included
bicolorata Distant from the Congo, or incognita Distant from an
unknown locality. Ahmad & Kamaluddin (1990) provided a key to the
Indo-Pakistan species, but did not include kuntiae Mathew from India.
Key to African Species (Modified from Linnavuori 1982)
1
Dorsal surface with whitish scale-like hairs; anterolateral lobes of
pronotum rectangular or roundly bluntly angular; mesosternum not concave (rugulosa
species group) |
2 |
-
Dorsal surface without scale-like hairs; anterolateral angles of pronotum
distinctly produced apicad (faintly so in pilosa); mesosternum
concave (dilatata species group) |
3 |
|
|
2(1)
Length 18-19 mm; body elongate, nearly parallel-sided; blackish brown;
costal margin with longitudinal band of dense whitish tomentum; membrane
grayish hyaline, veins concolorous; anterolateral pronotal lobes rounded;
disk finely punctate, only slightly rugose |
albivittis
(Germar) |
-
Length 14-17 mm; body broader; dark reddish brown; membrane pale brownish,
veins blackish; anterolateral lobes of pronotum sharp; disk with numerous
shiny pimple-like elevations |
rugulosa Distant |
|
|
3(1)
Hair covering of dorsal surface long, semierect, dense |
pilosa Linnavuori |
-
Hair covering inconspicuous |
4 |
|
|
4(3)
Puncturing on dorsal surface, including head, coarse and dense |
angulicollis
Stål |
-
Puncturing on dorsal surface, especially on head, fine |
5 |
|
|
5(4)
Color yellowish or reddish brown |
6 |
-
Color blackish |
7 |
|
|
6(5)
Larger, length 15-16 mm; pale ochraceous; ventral surface with only
indistinct infuscations; puncturing finer, on venter indistinct; second
antennal segment distinctly shorter than third; ventral margin of pygofer
thicker, median notch deeper and broader |
punctulata Stål |
-
Smaller, length 11.75-15 mm; darker, yellowish or reddish brown; ventral
surface, and femora, with dark irroration; venter with dark patches and
distinct puncturing; second antennal segment usually nearly as long as
third; ventral margin of pygofer thinner, median notch smaller |
neavei Schouteden |
|
|
7(5)
Scutellum elongate, only moderately tapering apicad; second and third
antenal segments fused |
monticola Linnavuori |
-
Scutellum distinctly tapering apicad, broadly triangular; second and third
antennal segments not fused |
8 |
|
|
8(7)
Robust, length 14.5 mm; antennae very short, total length of antennae 1.3
times as long as the width of the head across the eyes |
dilatata (Signoret) |
-
Smaller, length 12.0-13.2 mm; antennae longer, total length of antennae
1.5-1.64 times as long as the width of the head across the eyes |
tristis Schouteden |
Key to Indo-Pakistan Species (modified from
Ahmad & Kamaluddin, 1990)
1
Length of head distinctly less than length of pronotum, length of head and
pronotum together distinctly shorter than 1.5 times length of pronotum |
2 |
-
Length of head greater than length of pronotum; length of head and
pronotum together distinctly longer than 1.5 times length of pronotum |
3 |
|
|
2(1)
Pronotum with short posterior lobes; scutellum with longer apical lobe;
rostrum reaching posterior margin of fore-coxae; metathoracic scent gland
ostioles with peritreme very short, lobe-like |
nigripennis (Dallas) |
-
Pronotum without posterior lobes; scutellum with apical lobe markedly
shorter and much narrowed; rostrum reaching anterior margin of fore-coxae;
metathoracic scent gland ostioles with peritreme large, somewhat
blade-like |
albivittis
(Germar) |
|
|
3(2)
Anteocular distance slightly longer than 1.5 times length posterior of
head including eyes; in males, posterior margin of paramere convex; in
females, basal plates contiguous, apically convex |
pakistanica Ahmad & Kamaluddin |
-
Anteocular distance about equal or slightly shorter than 1.5 times length
of head including eyes; in males, posterior margin of paramere sinuate; in
females, basal plates separated mesially, sinuate apically |
fusca Ahmad & Kamaluddin |
David A. Rider
Professor of Entomology
North Dakota State University
202 Hultz Hall
Fargo, ND 58105
E-Mail: David.Rider@ndsu.edu
Published by the Department of
Entomology
Prospective students may schedule a visit by calling 1-800-488-NDSU.
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