70 
PARASITES OF GTPSY AND BROWN-TAIL MOTHS. 
early appearance of adult parasites. Mr. Titus, in 1906, tried the 
experiment of rearing a very few of these imported larvae, and found 
that in their later growth they gave out a second lot of parasites 
entirely different from those reared in May from the very young 
hibernating larvae, indicating a delayed development of eggs which 
must have been laid by adult parasites the previous autumn. Among 
these were at least two species, one belonging to the genus Apanteles 
and the other a Meteorus. Before his resignation in 1907 he started 
an extensive series of rearing experiments with the end in view of 
securing these parasites in large numbers. Partly on account of his 
enforced absence from the laboratory during a critical period, and 
partly through the unsuitable character of the rearing cages which 
were employed, the project did not meet with entire success. Only 
about 1,000 of the parasites were reared, of which all but a small 
percentage were the Apanteles. 
The importations of the summer following the trip above described 
were very large, and reasonably successful, and during June alone 
872 boxes were received, many others following during July and into 
August, shipments of brown-tail eggs and gipsy-moth eggs following, 
and of brown-tail winter nests in the late autumn and during the 
winter. As in 1906, tachinids made up the great bulk of the para- 
sites secured through the importation of pupae and active caterpillars. 
Notwithstanding the improvement in methods of shipment over 
previous years, Apanteles invariably hatched en route, and only dead 
adults or secondary parasites were received. 
Before the close of the summer it had become obvious that better 
quarters for the Massachusetts laboratory were necessary. The 
heating and lighting arrangements at North Saugus were insuffi- 
cient ; the building was not sufficiently commodious, and the location 
was not convenient. Therefore, after considerable search, Mr. 
Kirkland found and leased for a term of years a commodious house 
at Melrose Highlands (No. 17 East Highland Avenue) (see PL II, 
fig. 2, p. 56.) The building was remodeled so far as necessary to fit 
it for the work. The grounds back of the house were sufficiently 
ample to enable the building of several outdoor laboratories, properly 
screened and ventilated, which were planned and erected under the 
direction of the junior author. The building is well warmed, lighted 
with electricity, and, being close to fire protection, possesses many 
advantages over the old laboratory. Moreover, it is much nearer 
the central office in Boston, enabling an important saving of time in 
sending to the laboratory shipments of parasites received from abroad. 
The rental and the expense of construction were all borne by the 
State of Massachusetts. The new quarters are also within a stone's 
throw of a large area of waste land covered with scrub oak. 
