Observations on the Biology of Afrotropical Hesperiidae (Lepidoptera). Part 5. Hesperiinae incertae sedis: Dicotyledon Feeders
Author
Cock, Matthew J. W.
C / o CABI Europe - UK, Bakeham Lane, Egham, TW 20 9 TY, UK (e-mail: m. cock @ cabi. org; mjwcock @ btinternet. com)
m.cock@cabi.org
Author
Congdon, Colin E.
African Butterfly Research Institute (ABRI), P. O. Box 14308, Nairobi, Kenya (e-mail: colin. congdon @ gmail. com)
colin.congdon@gmail.com
text
Zootaxa
2013
2013-10-25
3724
1
1
85
http://dx.doi.org/10.11646/zootaxa.3724.1.1
journal article
134452
10.11646/zootaxa.3724.1.1
3fe084ed-d367-4d5a-9ed0-48882760ba96
1175-5326
5267833
7D05BB2E-4373-4AFB-8DD3-ABE203D3BEC1
Platylesches tina
Evans, 1937
Evans (1937)
described this species from a single male from Mt.
Mulanje
,
Malawi
. It is now reported from
Kenya
and
Uganda
, south to the
Caprivi
Strip,
Namibia
, and northern
South Africa
(
Kielland 1990
,
Larsen 1991
,
Henning
et al
. 1997
,
Heath
et al
. 2002
).
Food plants
Larsen’s (1991)
suggestion that the food plants were ‘almost certainly various grasses’ is incorrect.
Woodhall (1994)
reports rearing this species on
Pa. curatellifolia
at Venda,
South Africa
, in 1989 and provides notes on the early stages, a sketch of the pupal leaf shelter and a photograph of the final instar caterpillar (also shown in
Henning
et al
. 1997
). The food plant record is repeated in
Pringle
et al
. (1994)
,
Henning
et al
. (1997)
and
Woodhall (2005)
. Woodhall’s observations are at variance with those of TCEC who reared this species on
Pa. curatellifolia
at Mufindi,
Tanzania
, which are presented below.
FIGURE 83.
Life history of
Platylesches shona
, collected on
Parinari cutatellifolia
, Mutinondo Wilderness
, Zambia, TCEC.
1
, pupal shelter, 4 Dec 2007;
2
, final instar caterpillar, dorsal view, 5 Feb 2008;
3
, as #2, lateral view;
4
, detail of head, anterior view, 4 May 2008;
5
, as #4, 5 Feb 2008;
5
, pupa, dorsal view, 21 Apr 2008;
6
, as #5, lateral view.
FIGURE 84
. Leaf shelter and feeding damage of final instar caterpillar of
Platylesches tina
, collected on
Parinari curatellifolia
, undated, Mufindi, Tanzania, TCEC.
1
, from above;
2
, from below.
Life history
Congdon
et al
. (2008)
described the life history. The egg is laid on a small plant or a branch near ground level. The larva cuts and folds a leaf downwards. It secures the cut portion to the underside of the leaf and then folds a portion round at the front. The chamber is completed by making a round hole at the front and lining it with silk (
Figure 84
). Like tubes shelters, these can be seen quite easily by looking at the underside of a branch, where the dark green folded portion stands out in contrast to the pale undersides of the leaves. Only very occasionally will a
Pl. tina
larva secure the chamber to a second, lower leaf. This species is unusual in having a green larva, and the thoracic segments of the pupa are also greenish. The feeding pattern results in characteristically ragged edges to mature leaves.
Woodhall (1994)
reports the final instar caterpillar of
Pl. tina
as
10mm
long, when found on young foliage on coppice growth of
Pa. curatellifolia
; body leaf-green, head brown with white-cream patched outlines with darker brown in a radial pattern as in
Pl. moritili
.
The leaf-shelters were constructed by taking a whole young leaf and folding it in two up the mid-rib fixing the edges together with closely spaced short silk strands. The pupa is
10mm
long, dull cream coloured, adult appendages picked out in dark brown. Pupation inside thin silk cocoons within the leaf shelter lasted about three months.
FIGURE 85
. Final instar caterpillar of
Platylesches tina
, collected on
Parinari cutatellifolia
, Mufindi
, Tanzania, TCEC.
1
, dorsolateral view in opened shelter, 3 Feb 1998;
2–6
, detail of head, anterior view, showing range of variation:
2–4
, 22 Dec 1995;
5
, undated;
6
, 2 May 1998.
FIGURE 86
. Pupa of
Platylesches tina
, collected on
Parinari cutatellifolia
, 14 Mar 1998, Mufindi, Tanzania, TCEC.
1
, dorsal view;
2
, lateral view.
FIGURE 87
. Adult male
Platylesches tina
, Mufindi, 1400
m, Tanzania, 30 Mar 1998, TCEC. Note the almost iridescent patches on the underside of the fresh specimen, also found in
Pl. robustus
. Forewing length 10–11mm (
Kielland 1990
).
This is not the same caterpillar or pupa as that of
Pl. tina
reared by TCEC (
Figures 85–86
). Furthermore, TCEC found caterpillars of
Pl. tina
on mature growth not on coppice growth, and they made chamber shelters rather than tube shelters. Either
Pl. neba
comprises more than one
form based
on the early stages, or the reared material has been misidentified in one (or both) cases. As we are confident of the identity of TCEC’s reared material (
Figure 87
), and
Woodhall (1994)
refers to the similarity of the caterpillar to
Pl. moritili
, could it be that the species reared by
Woodhall (1994)
is a small taxon in the
Pl. moritili
complex, as we have suggested above for the
Pl. neba
reported by
Henning
et al
. (1997)
.