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ACTING STATE ENTOMOLOGIST. 81 
And beyond this again, and equidistant from it, from each other, and from the apex of the wing, there 
is on the costa a pair of short white streaks, the inner one much the shorter of the two. Thus along the 
costa we have a series of seven very conspicuous short white streaks, arranged 2, 2 and 3. The ter¬ 
minal of the front wing is mostly rust-red, with a series of abbreviated, black, longitudinal lines, 
springing from the outer edge of the curved prolongation of the inner one of the 2d pair of streaks on 
the costa; and beyond these short black lines are two very oblique, short, pale steel-blue streaks, one 
springing from the posterior angle and the other a little above it from the outer margin. Disk of the front 
wing rust-red, with many indistinct, short, black, longitudinal lines, and on its centre the pale steel-blue 
blptch already referred to. On the middle of the inner margin, a large, elongate-triangular, rust-red 
patch, the apex of the triangle directed towards the apex of the wing and attaining the disk, the base of 
the triangle occupying nearly % °f the inner margin. This triangular patch is bisected lengthways by 
a very elongate and slender black triangle, the apex of which attains its apex ; and the rust-red space 
on each side of this last triangle is again indistinctly bisected lengthways by a still more elongate tri¬ 
angle composed of confluent black atoms. Fringe dusky, with a black basal line all along it. Hind 
wing dusky-gray at base, shading into black at tip. On the middle of the outer margin, in the male hut 
not in the female, an elongate semi-oval patch (fig. 3a) of metallic-brassy scales, brighter in certain lights. 
FHnge of the male (fig. 3a) long, sparse and grayish-white on its anal ]4, short, dense and dusky with a 
basal black line for its remaining Fringe of the female (fig. 3) nearly of uniform length, coarse and 
dusky throughout on the % next the wing, then suddenly fine and grayish-white on its outer Body 
brown black. Face and palpi grayish-white. Shoulder-covers largely tipped with dull rust-red. Tips 
of the abdominal joints pale fuscous above. Legs dusky. All beneath, including the legs, with a more 
or less obvious silvery-white reflection. 
Described from 13 specimens, (4 males, 9 females) bred from infested plums August 23d-September 
15th. The males were readily distinguished by the exserted anal forceps. Three specimens bred from 
Black-knot, Aug. 31 — Sept. 7th, three others bred from the Elm-Gall ( TJlmicola, Fitch) July 26th — Aug. 
5th, and a single one bred from the Oak-Gall ( Q. singularis, Bassett) on Sept. 2d, none of them differed 
from the plum-fed specimens in any important point. I sent a single specimen, bred from the Black- 
knot, to the late Dr. B. Clemens, about a year before his lamented death; but he never, so far as I 
know, investigated its classification. For the satisfaction of the incredulous, I may add that I sent 
specimens, bred respectively from the Plum and the Elm-gall, to the distinguished English Entomolo¬ 
gist, H. T. Stainton, who is well known to have made the smaller moths his special study for years; and 
that he agrees with me that they are “ perfectly identical.” It is to the kindness of this gentleman that 
lam indebted for the generic determination of this species, and for the following very valuable com¬ 
parison of it with the European species ( S.janthinana ) which, as he informs me, is the most closely allied 
to it. The small European moth ( Opadia funebrana, Treitschke), which I quoted in the Practical Ento¬ 
mologist (II. p. 79) as occasionally boring into plums in England, has been referred, as Mr. Stainton 
informs me, both by himself and by Wilkinson to the same genus to which the Codling-moth ( Carpocapsa 
pomonella, Linnaeus) belongs ) and is consequently widely distinct from my Plum moth. Mr. Stainton 
further tells me that, just as I anticipated in the Practical Entomologist, 11 in some years this insect is 
injurious to the Plurmcrop in England, but the moth is entomologically scarce, and few collections are 
well supplied with it.” “ I have not,” he adds, “ obtained a single specimen for more than 20 years.” 
“ Semasia prunivora is allied to S. janthinana, Duponchel — which, if I remember rightly, has been 
bred from gall-like growths on hawthorn twigs, though V. Hernemann, who gives no habitat for the 
larva, says that the imago frequents sloe-bushes [the English wild plum]— but with the anterior wings 
narrower, the pale mark from the middle of the inner margin more obliquely placed, and with four dis¬ 
tinct transverse leaden-blue streaks from the costa. In Janthina'na there are no leaden-blue streaks. 
In the centre of the pale dorsal [discal ?] blotch is a distinct darker line, rather more defined than in 
Janthinana. On the surface of the anterior wings are numerous short longitudinal pale orange streaks, 
which give the insect a much brighter appearance than we see in Janthinana. Lastly, the posterior 
wings are, towards the hind margin, blackish, and therefore much darker than in Janthinana.'" 
The Larva, when 0.11 inch long, is abuKt 6 times as long as wide, of a dingy white color, with some 
fine short dusky hairs. Head, a horny obsemicircular plate on the 1st segment behind the head, and a 
horny semicircular plate on the anal segment, all black and polished. Legs and prolegs, dingy white. 
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