138 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
Rob. as undoubtedly a synonym, the extradiscal line is nearly straight 
near and on the costa; and there can be Been the same dark brown 
streaks in the brown BUbapical patch, which are so marked and dis- 
tinctive in the female. I can recognize this patch, with the points sent 
outward from it, in Grote and Robinson's excellent colored figure, as 
well as in oue of my specimens. The females of /'. leucoplHva (and 
clintonii), of which I have a small one from Florida, are at once dis- 
tinguished Irom those of P. achatina by the outer line endiug more 
obliquely ou the costa. Just beyond this line and extending towards 
the apex are three dark brown longitudinal patches, with the spaces 
between filled up with brown, the whole forming a large, conspicuous 
dark brown patch, with ragged edges or points extending towards the 
outer margin of the wing. 1 have a male of 1\ clintonii which has 
been compared with one in Mr. Thaxter's collection, named for him by 
Mr. Grote; also one so labeled given me by Mrs. C. H. Fernald; also 
one so named raised by Mrs. A. T. Slosson from a larva found at Fran- 
conia, N. EL, feediug on Hamamelis the second week in June. It re- 
mained, she kindly informs me, nineteen days in the cocoon, the moth 
appearing from June 27 to 30. It seems probable to me that P. ban- 
flava Pack., P. obliquata G. and R., and P. cinnamomea G. and R. are 
synonyms of P. clintonii. and that the latter is the same as P. lencophaa 
of Abbot and Smith. Unfortunately we do not know the appearance 
of the larva of this species except from Abbot's drawings, as it has not 
since his time been described and figured. 
191. The European gipsy moth. 
Ocneria dispar (Linn.). 
Plate xxxvu. 
This insect, originally introduced from Europe through an accident 
by Mr. L. Trouvelot while living in Medford, Mass., about the year 1868 
or 1869, has become acclimated, and during the summer of 1889 caused 
u very great alarm," being " very destructive" to fruit and shade trees, 
including the " linden, elm, birch, beech, oak, poplar, willow, hornbeam, 
ash, hazel-nut, larch, fir," etc. It is a destructive insect in Europe. 
The information here given is taken from an illustrated pamphlet pub- 
lished in 1889 by Prof. C. H. Fernald, entomologist of the Hatch Ex- 
periment Station at Amherst, Mass., who recommends showering the 
trees with Paris green in water (1 lb. to 150 gallons) soon alter the 
hatching of the eggs in spring. 
Eggs.- -Globular, about ^Vincli in diameter, salmon colored, smooth, and laid often 
to the number of 400 or 500, early in July, on the under side of the branches or on 
the trunks, or on fences and on the sides of buildings. They do not hatch until th e 
following spring. 
Larva, — Length, 1.75 inches. Body very dark brown, or black, finely reticulated 
with pale yellow. There is a pale yellow line along the middle of tLe back, and a 
Similar one along each side. On the first six segments behind the head there is a 
bluish tubercle armed with several black spines on each side of the dorsal line, and 
on the remaining segments these tubercles are dark crimson red. Ou the middle of 
