17 
had been abundant, but failed to find any eggs corresponding to those 
of the female he had dissected. Renewing his search with greater 
care in the early part of December, when all the leaves were off, he 
succeeded in finding the object of his search. These were found in 
the little crevices and under the little scales around the buds, but not 
on the buds themselves. They were naked, without any cottony cover¬ 
ing, disposed without order, sometimes isolated and sometimes aggre¬ 
gated. They were ovoid, furnished on the side near the larger end 
with a short curved beak. When seen in position the beak is not 
apparent, as it is on the under side and forms the attachment to the 
bark; they are also sometimes furnished with a minute filament, 
and are of a reddish yellow color. 
It is very probable that careful examination of the eggs of the pear- 
tree Psylla will show that they are similar to those of thelig-tree Psylla; 
also, that they pass the winter in the egg state, and that their eggs 
are placed on the branches or bud stalks, It is more than probable 
that this method is somewhat varied for the summer brood. 
As befoie intimated, this is an imported species, brought from Europe 
on impoited pear-trees, and was first observed in this country in 1833 . 
I have no positive knowledge that it has yet reached Illinois, still 
I think it more tluin probible that it has. So far as observed in this 
country the following appears to be their mode of operating: they 
inseit theii short beaks in the bark of the twigs and small branches, and 
pump up the sap to such a degree that the fluid oozes from their 
bodies, and mingling on the bark wpth their castings, forms blackish, 
rusty patches. The presence of these pests on pear-trees is generally 
indicated by swarms of flies or ants, which are attracted thither by the 
sweetish fluid which issues from the Psylla. As a rule, young trees ap¬ 
pear to be more liable to their attacks than old ones, 
Remedies. A\ ash the twigs with a brush which has been dipped in 
strong soap-suds, or some noxious mixture of this kind. Harris rec¬ 
ommends a mixture of strong soap-suds and Hour of sulphur. This 
must be done before the buds expand. 
A better remedy will be perhaps, to wuiit until after the eggs are 
hatched, then apply ordinary soap-suds, whale-oil soap-suds or lime 
water, as strong as the plant will bear without injury. Kerosene cau¬ 
tiously applied will be effectual. 
Spec, char .—The young are usually of a dull orange-yellow color; 
short, and obtuse behind ; and as they advance to the pupa state, ac¬ 
quire little w r ing-scales. 
The peifeet or winged individuals, are about one-tenth of an inch 
ong fiom the front to the tip of the closed wings; the eyes are large 
and prominent; the. head and thorax are of a brow T nish-oran<>e color, 
the abdomen greenish; the wings are transparent, ample amf marked 
with very fine dark veins. 
6. Psylla rubi , \\ . and R. The Blackberry Flea-louse. 
I know nothing further of this than the short notice given of it in 
the American Entomologist . The writer, a resident of New Jersey 
desciibesits operations as follows: “The suckers upon which this insect 
occurs in the spring commence to twirl around, and, when not inter- 
teied with make a complete revolution before they resume their usual 
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