232 Mr. E. Doubleday on some new Diurnal Lepidoptera. 
with both plants in several localities ; in fact, both appear to be 
plentiful in situations suitable for them. 
I am, yours, &c., 
September 1, 1845. Toomas Moore. 
P.S. Mr. Babington has just favoured me with the following 
specific characters for these two plants :— 
G. fluitans (R. Br.); panicle subsecund, slightly branched, 
very long ; branches nearly simple, roughish, divaricated whilst 
in flower ; spikelets linear, of 7—12 flowers; outer pale nearly 
thrice as long as broad, blunt ; anthers about five times as long as 
broad (purple); sheaths compressed. Leaves pale green, acute. 
Ligule elongate. Outer pale blunt, with a triangular central 
point. Dry anthers pale yellow.—Poa fluitans, var. subspicata, 
Parnell’s British Grasses, p].95. This plant is considered as the 
true Festuca fluitans of Linnzeus by the Swedish botanists ; it was 
originally published under that name in ‘ Linn. FI. Suec.’ 
G. plicata (Fries); panicle compound; branches compound, 
nearly smooth, divaricated whilst in flower ; spikelets lmear, of 
7—20 flowers ; outer pale oval, twice as long as broad ; apex ob- 
tuse-angled, with three nearly equal teeth ; anthers thrice as long 
as broad (yellow) ; sheaths compressed. Resembling G. fluitans. 
Ligule shorter. Dry anthers fuscous. Leaves glaucous, bluntish. 
—G. plicata, Fries, Noy. Fl. Suec. Mant. 1.6. F. fluitans, Eng. 
Bot. pl. 1520. Poa fluitans, Parn. pl. 45 (not good). Mr. Ba- 
bington has seen authentic specimens of this plant, from Fries 
himself, which agree with that found commonly in Britain. 
XXVI.—Descriptions of new or imperfectly described Diurnal 
Lepidoptera. By Eywarpv Dovus.epay, Esq., Assistant in the 
Zoological Department of the British Museum, F°.L.8. &e. 
{Continued from p. 182.] 
Fam. NYMPHALIDAL. 
Genus Diapema, Boisd. 
Diadema Nama, Boisd. MSS. D.-alis anticis sinuatis nigris, posticis 
castaneis, omnibus albo lineatis maculatisque. Exp. alar. 3 unc, 
6 lin. vel 90 millim. 
Hab. Sylhet, &c. 
Anterior wings with the outer margin sinuate, slightly glossed 
with purplish, especially towards the apex ; with numerous semi- 
transparent markings of a bluish white, viz. a longitudimal vitta 
in the cell at the base, followed by two spots, of which the outer 
one is triangular; above these three indistinct spots, the middle 
one sometimes wanting ; between the lower median nervule and 
