16 
In the Department collection are specimens of the larve of the straw- 
berry crown-miner from New York and Oregon which agree with the 
description above quoted by Saunders of the larvee studied by him in 
Ontario and are totally different from all the true twig-borers which we 
have had from various parts of the country. 
The larve of the twig-borer, Anarsia lineatella, as described by 
Glover, and as studied by Comstock (as shown by our examination of 
his notes and specimens) agree with each other and with the other 
larvee received from various sources in the Department collection, and 
also with the material obtained from the twigs of various stone fruits 
from the Pacifie Slope. 
Clemens’s brief description of the larvie taken crawling on a plum 
tree corresponds in the main also with the twig-borer as we know it, 
but is too short and imperfect to be of much value, and fails to mention 
the distinctive anal shield unless it is included in the expression * ter- 
minal prolegs black.” He says: 
The larva was taken June 16, full grown and about to transform on the limbs of 
the plum. Its head is black, body uniform reddish-brown with indistinct papule, 
each giving rise to a hair, and with pale brown patches on the sides of the third and 
fourth segments; shield and terminal prolegs, black. One specimen had secreted 
itself under a turned-up portion of the old bark of the trunk. The cocoon is exceed- 
ingly slight, and the tail of the pupa is attached to alittle button of silk. Thepupa 
is ovate, abdomen short and conical, smooth; color, dark reddish-brown. I do not 
know on what part of the tree the larva feeds.—(Proc. Acad. Nat. Sci.,Phila., 1860, 
p. 170.) 
The dark color of the body generally and the black head, thoracic. 
shield, and anal prolegs (and probably anal shield) remove Clemens’s 
larva absolutely from the strawberry crown-miner and ally it to the 
twig-borer, with which its location on plum also places it. 
All the evidence bearing on this matter is in accord, except the state- 
ment by Mr. Cordley that the larve received in peach twigs in the 
spring of 1896 from various lecalities in Oregon agree with the larvee 
found by him in strawberry plants later in the same year, both agree- 
ing with Saunders’s description. Curiously enough, however, the twig: 
boring larvee which he got in numbers the following spring (1897) are 
of the normal type and entirely distinct from the former, which would 
certainly seem to throw doubt on the previous statement, and particu- 
larly in view of the facts we have already given.! 
As a way out of the difficulty, Mr. Cordley suggests possible dimor- 
phism, or that there are two distinct insects involved, and that the 
strawberry crown-miner may occasionally work in the twigs of the 
peach. That this last suggestion may be true is not impossible, but 
before acceptance needs substantiation by additional proof. 
At any rate, the true larva of A. lineatella, viz, the twig-borer, has 
‘In his subsequent reproduction of his notes on this insect (note, p. 10) he states 
that none of the larve first mentioned were preserved, and that he relies on his 
recollection of the matter only. 7 
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