16 
In the Department collection are si>eciniens of the larvu'of the straw- 
berry crownininer t'roni New York and Oregon which agree with the 
description above qnoted by Sannders of the larva* stndied by him in 
Ontario and are totally ditlVrent from all the trne twig-borers which we 
have had from varions jiarts of the conntry. 
The larva* of tlie twig-borer, Anarnia Uncatella, as desrribi*d by 
(Jlover, and as studied by Comstock (as shown by our examination of 
his notes and specimens) agree with each other and with the other 
larva* received from various sourct*s in the Department collection, and 
also with the nmterial obtained from the twigs ot various stone fruits 
from the Pacific Slope. 
(Jlemens's brief description ol the larva* taken crawling on a i>lum 
tree corresponds in the main also with the twig-borer as we know it, 
but is too short and iiiii)erfcct to be of mncli valiu*. and fails to mention 
till* distinctive anal shield unless it is inclu(l(*(l in the expression '"ter- 
minal i)rolegs black." He says: 
The l.irva was taken .Iiiur 16, full «;rowii and al)out to trans form on the limbs of 
tlir i)huii. Its head is Idatk, body uniform reddish-brown with imiistinct pajnihr, 
each ^ivin^ rise to a hair, and witli jialo brown pat<'he8 on the sides of the thinl and 
fourth s«'<;ments; sliield and terminal i)role«j;s. black. One specimen had s<-crett*d 
itself under a turned-up ]>ortion of the old bark of tlio trunk. The cocoon isexceed- 
inji^ly sli^rht, and the tail of the ])upa is attached to a little button of silk. Thepujia 
is ovate, abdomen short and couiral, smooth ; color, dark reddish-brown. I do not 
know on what i)art of the tree the larva feeds. — (Troc. Acad. Nat. Sci.,Phila.. 1S60, 
p. 170.) 
The dark color of the body generally and the black head, thoracic 
shield, and anal prolegs (and probably anal shield) remove Olemens's 
larva absolutely from the strawberry crown-miner and ally it to the 
twig-borer, with which its location on i)lum <\\sn places it. 
All the evidence bearing on this matter is in accord, except the state- 
ment by Mr. Cordley that the larva* received in i)each twigs in the 
spring of 1896 from various localities in Oregon agree with the larvje 
found by him in strawberry plants later in the same year, both agree- 
ing with Saunders's description. Curiously enough, however, the twig- 
boring larva* 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 i)ossible dimor- 
l)hism, 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 trm* is not impossible, but 
betbre acceptance needs substantiation by additional proof. 
At any rate, the true larva of A, lineatellay viz, the twig-borer, has 
' In his subsequent reproduction of his notes cm this insect (note, p. 10) he states 
that none of the larva* first mentioned were preserved, and that he relies on his 
recollection of the matter onlv. 
