15 
Our records for the first summer brood indicate a period of about six 
weeks as necessary for its complete development. The time necessary 
in the warmer months for the iater broods is probably even less, and 
it is evident that there are certainly three broods of larve annually, if 
not four. 
One of the important points remaining to be cleared up in regard to 
this insect is whether the larve found in the crotches of the branches 
in late summer and fall come from eggs piaced in these situations or are 
migrants from some other parts of the plant. Mr. Ehrhorn’s supposition 
that the eggs were placed by the moth where the larval chambers are 
afterwards found is borne out by the small size of the larvie, which are 
not much larger than when newly hatched. The comparatively large 
size of the egg, and its striking appearance, and the lack of any attempt 
at concealment of it should enable one, where the insect is abundant, 
to clear up this uncertain feature without difficulty. 
THE STRAWBERRY CROWN-MINER A DISTINCT INSECT. 
The generally held belief hitherto that the lepidopterous crown-miner 
of the strawberry is the same insect as the twig-borer of the peach will 
have to beabandoned. If there were no other evidence on whiclk to base 
this conclusion, the habits of the twig-borer, as now known, through- 
out the year are so peculiar and distinctive as to render very improb- 
able the supposed strawberry-infesting habit, and this first led to my 
doubting the accuracy of the latter. This doubt became a certainty 
after a comparative study of the specimens of the larve in the Depart- 
ment collection from the strawberry and from the twigs of stone fruits, 
made in connection with an examination of the published descriptions 
of larve and their habits from voth sources. The notes recently pub- 
lished by Cordley are in the main also confirmatory of this conclusion. 
The original description of the larvie of the strawberry crown-miner 
by Mr. Saunders is as follows: 
Length, 0.42 inch. Head rather small, flattened, bilobed, pale brownish-yellow, 
darker in color about the mouth, and with a dark brown dot on each side. 
The body above is semitransparent, of a reddish pink color, fading into dull yellow 
on the second and third segments; anterior portion of second segment smooth and 
horny looking, and similarin color to head. On each segment are a few shining 
reddish dots—yellowish on the auterior segments—or faintly elevated tubercles, from 
each of which arises a single, very fine, short yellowish hair, invisible without a 
magnifying power. These dots are arranged in imperfect rows, a single one across 
the third, fourth, and terminal segments, and a more or less perfect double row on 
the remaining segments. 
The under surface is of a dull whitish color, becoming faintly reddish on the hinder 
segments, with a few shining whitish dots; those on the fifth, sixth, eleventh, and 
twelfth segments being arranged in transverse rows, in continuation of those above. 
Feet and prolegs yellowish white, the foriner faintly tipped with dark brown. It 
spins a slight silken thread, by means of which it can suspend itself for a time at 
a short distance from its place of attachment.—(Ann. Rept. Ent. Soc. Ontario, 1872, 
p. 16.) 
