THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
135 
seeds of the common yarrow, winters on 
the food-plant, not changing to the pupa 
state till May ; the imago appears in 
July and August. 
Pterophorus ochrodactylus on Achillea 
Plarmica. On the 15th of May, 1857, 
I found this (till then unknown) larva on 
Achillea Ptarmica in sheltered places. 
It lives singly between the united ter- 
minal leaves, and feeds on the tender 
pith of the stem, which it often excavates 
to the depth of an inch. Its presence is 
betrayed by the heaps of black excre- 
ment which protrude from between the 
decaying heart-leaves. The young larva 
is greyish white, with four brown longi- 
tudinal stripes on each side, and a dark 
dorsal line. After the last moult (towards 
the end of May) it is six lines long, 
greenish olive, shining, with three white 
longitudinal lines on each side, the 
middle line being the slenderest. Dorsal 
line darker green. The pupa is at first 
green, afterwards brown ; it is suspended 
free by the tail. The imago appears 
early in July. 
Cochylis Poslerana on several Com- 
posite. According to Zeller, the larva 
of this Tortrix feeds in the flower-heads 
of Arctium Bardana, Carduus nutans, 
Centaurea jacea, and, according to Von 
Hornig, also in Carduus Acanthoides, on 
which plant he found them at the end of 
October. The larva is dull yellow ; the 
head brown-black ; the thoracic shield 
pale brown-grey. It changes to the 
pupa state in or on the earth in a thick 
cocoon covered with grains of earth. The 
imago appears at the end of May and 
beginning of June. 
Depressaria Cnicella on thistle. I have 
repeatedly bred this insect from very 
lively green larvae, which feed in June, 
on the radical leaves of Cirsium lanceola- 
tum. They gnawed the flesh of the upper 
side of the leaf in stripes, and covered 
themseh'es by turning down the edge of 
the leaf. Herr v. Tischer furnished for 
the Treitschkean Cnicella the description 
of a larva which feeds gregariously in 
May on Eryngium campesfre, between 
united leaves. Certainly his larva is 
different from that which has furnished 
me the Depressaria which Zeller deter- 
mined for me as Cnicella. 
[Is it not possible that there may be 
two closely allied species, one of which 
feeds on Eryngium and the other on 
thistle? The former has of late years 
been always reputed the true Cnicella ; 
but perhaps the thistle-feeder may be 
able to substantiate a claim to that title. 
The matter is worthy of serious con- 
sideration.] 
Procris Glohulariee on Centaurea. This 
larva, which should feed on Plantago 
lanceolata, was found by Zeller on Cen- 
taurea. It bores into the leaf, and eats 
out the parenehyma to near the tip, the 
leaf thus appearing inflated. When it 
can find no more to eat it bites its way 
out of the leaf, and proceeds to another, 
which it treats in a similar way, so that 
one finds more leaves empty than are 
tenanted by larvae. It undergoes its 
metamorphosis in a slight cocoon on the 
earth. 
(To be continued.) 
