22 
white. Fore wings cinereous, with nearly the basal third usually paler; 
a large triangular blackish spot on the middle of the costa, just beyond 
which and nearly in the middle of the wing are two black dots, placed 
transversely; about one fourth from the end of the wing is a very obscure 
blackish double bar, and still nearer the tip an obscure row of blackish 
dots; on the posterior part of the wing, or that part which is opposite the ! 
costa, are two rather large pale brick-colored spots, one at the base and 
the other one third of the way to the tip. Hind wings paler, somewhat! 
dusky towards the tip. Abdomen inclining to pale buff, more or less’ 
distinctly fasciate with black at the bases of the segments. All the! 
above characters, except the occasional whitish on the head and thorax 
and the paler base of the wings, are found much more conspicuously on the | 
Phycita nebulo. Indeed, these marks are usually either wholly or partially 
indistinguishable on the P. juglandis. We may also add, as a pretty con-; 
stant distinctive mark between the two moths, that the two dots on the 
fore disk of the upper wing in P. juglandis almost always run together in : 
P. nebulo , forming a very short, black, transverse bar.” 
The following description of the dipterous parasite of P. nebulo is given : 1 
ll Tachina (. Exorista) phycitee , n. sp. Male.—Length, two tenths of an 
inch. Antennae black; third joint twice as long as the second. Face 
silvery, without bristles at the sides; sides of the front with a dull golden 
tint, becoming silvery at its junction with the face; the middle black 
vitta occupying a little more than half of the interocular space; frontal 
bristles continued down the face to opposite the junction of the second 
and third joints of the antennas. Palpi blackish brown. Eyes hairy.; 
Thorax black, with the ordinary cinereous stripes scarcely perceptible. j 
Abdomen black, varied with cinereous at the bases of the segments; a, 
large fulvous spot on the side of the abdomen, occupying nearly the whole,: 
of the side of the second segment, about half the third, and sometimes a: 
small spot on the first; bristles on the middle, as well as at the end, of 1 
the second and third segments. Venation of the wings of the usual type; 
first posterior cell almost closed before the end of the wing; fourth long 
vein slightly curved beyond the angle; fifth long vein prolonged to the i 
margin; hind cross vein moderately curved. Tarsal claws and pulvilli un- i 
usually long. 
Female.—A single specimen, a little larger than the others, was obtained i 
from the same lot of Phycitae, which may be the female of this species. I 
It differs as follows: Front broader. Antennae inclining to brown. The i 
cinereous markings on the body more distinct. The tip of the abdomen i 
fulvous, but without the fulvous spot on the side, and with the tarsal I 
€laws of the usual length.” 
Characters of Tachina, Exorista, and Lydella tabulated. 
Periodical Cicada (pp. 124-133).—The year 1871 witnessed one of the 
periodical returns of this insect. Its geographical range given. Each fe¬ 
male lays about four hundred eggs in twigs of deciduous trees. Method 
of egg-laying described. Time of hatching varies with the latitude from 
the 20th of July to the last of August. Eggs in twigs that die do not ; 
usually hatch. Little is known of the larval history. Instances of their ; 
depth in the ground given and Dr. Smith quoted as to their manner of 
feeding. The adults begin to appear in the latter part of May and last! 
fiye or six weeks. Geographical extent of the brood of 1871 given. The 
damage done by them is nothing more as a rule than a severe twig-prun- * 
ing, though young orchards and nursery stock may be killed. They can¬ 
not be driven away. Avoid planting a nursery or young orchard on cleared 
land or near timber when their reappearance within a few years is ex¬ 
pected. 
Insects Injurious to the Pear-tree. (2d Ann. Rep. State Ent. Ill. [third of 
the series], pp. 134-136.) 
The Pear Flea-Louse.—This species, seemingly identical with Psylla pyri 
of Europe, found imbedded in the axils of the leaf-stalks and immersed in 
the exuding sap. Points of discrepancy between this species and P. pyri l 
given, and the name americana suggested for it if it should prove distinct. 
