INSECTS OF THE THORN. 535 
the tip are a few whitish, costal streaks, and at the apex a smail, rouud, dark-brown 
spot, in a whitish patch, with a circular, dark-brown apical line behind it ; cilia, 
blackish-gray. Hiudwings blackish-gray ; cilia, rather paler. Abdomen blackish, 
tipped with dull yellow. 
7. Conotrachelus cratwgi Walsh. 
Order Coleoptera ; family Curculionid^e. 
The late B. D. Walsh found this weevil abundant near Kock Island, 
111., on the hawthorn, also plentifully on the same kind of shrub, near 
Chicago. (Proc. Bost. Soc. Nat. Hist., ix, 311.) 
The beetle. — Of the size, shape, and sculpture of anaglypticus Say, but differs in the 
elytra being of a uniform color, mottled with ocher-yellow and white, and in the 
upper surface of the thorax being whitish, except a large and conspicuous triangular 
spot at its base, and the anterior margin, which, as well as the inferior surface, is 
brown. The second tooth on the femora is obsolete. 
8. The buffalo leaf-hopper. 
Ceresa bubalus Fabr. 
This singular but very common leaf-hopper, according to Fitch, fre- 
quents the wild thorn, and has been found by Mr. John G. Jack to be 
positively injurious to young apple and pear trees, as they cut the 
bark when depositing their eggs. u These incisions and the eggs in 
them were so numerous that in many cases it was impossible to raise 
the bark for the purpose of budding the t rees. The incisions and eggs 
are usually most abundant on the south and upper side of the limbs, 
comparatively few being found on the shady or under sides." They 
begin depositing their eggs, adds Mr. Jack, at Ohateauguay, Quebec, 
August 12, the process going on until the close of October. 
The eggs, in batches of from live or six to a dozen (rarely more), are deposited 
obliquely in the bark, and often the incision continues into the wood, if the bark is 
thin. In this way the bark and wood become fastened together, and will not -sepa- 
rate at any season, and the dark spots in the wood and the rough knotty bark bear 
evidences of the injuries for many years. 
The eggs are of a dirty transparent white, about 1.5 mm in length, smooth, slightly 
tapering, and sharply rounded towards the interior end, but tapering much more 
gradually at the exterior end. Although normally round, the sides are generally 
found to be more or less flattened by pressure from the tissues of the wood and bark 
of the tree. So numerous were these eggs on some trees that a careful estimate 
shows that there must be at least from six to eight hundred eggs in a section of the 
branches not more than an inch long and half an inch in diameter. 
They hatch during the first week in June. 
A small dipterous egg-parasite has been raised from the eggs by Mr. 
Jack. 
The following insects also live on the thorn : 
9. Basilarchia astyanax (Fabr.). 
10. Basilarchia arthemis (Drury). 
11. Uranoles melinus, on C. coccinea and G. apifolia (Scudder). 
