PREVIOUS WORK WITH INSECT PARASITES. 
41 
the first day. The adults lived certainly for 35 days. Reproduction 
occurred in the experimental jars, and the adults secured by this 
laboratory reproduction were liberated in two localities near Boston 
and parasitized eggs were sent to Prof. J. B. Smith at Xew Brunswick, 
X. J., Prof. M. V. Slingerland at Ithaca. X. Y., and others to Washing- 
ton. The first of the Massachusetts colonies consisted of about 600 
parasites inclosed in an open tube tied to a tree in the Harvard yard, 
Cambridge, Mass., on June 22, Mr. Fiske thinks that more than 100 
found their freedom on the same day, and almost certainly all of the 
rest within a week. A little more than a month later Mr. Fiske 
found parasitized eggs one-fourth of a mile away from this colony. 
At Melrose Highlands more than 1,200 were liberated on the 21st of 
June and the 8th of July: and on the 27th of July fresh native eggs in 
the neighborhood produced parasites, indicating the development of 
a generation on American soil. In the summer of 1909 none of the 
parasites was found, but this by no means indicates that the species 
has not become established. Both the eggs and the parasites are 
very small, and the writer expects t hat even from this fust experiment 
good results will follow. Arrangements had been made for a repeti- 
tion of the sending in May, 1909. from Montpellier, this southern 
locality allowing such an early sending as to insure the arrival of the 
parasitized eggs in the l/nited State- at the proper time of the year. 
Relying upon Prof. Mayet's promises and his great experience as an 
entomologist, no other arrangements were made. Most unfortu- 
nately, however, just before the time arrived Prof. Mayet died, and 
the introduction was not made. It should be stated that in the death 
of this admirable man France lost one of it - most enlightened and able 
economic zoologists. It is hoped to repeat the introduction, through 
the kindness of Dr. Marrhal in Prance and Prof. Silvestri in Italy. 
Silvestri has promised also to send other natural enemies of the elm 
leaf-beetle from Italy. 
Work with Parasites of Ticks. 
Ti 1907 the senior author described the first species of a hymenop- 
terous parasite ever recorded as having been reared from a tick. 
The name given to it was Ixodiphagus texanus, and it had been 
reared from the nymphs of Hsemaphysalis le ports- palustris Pack, 
collected on a cotton-tail rabbit in Jackson County, Tex., by Mr. 
J. D. Mitchell. In 1908 he described another, Ilunterellus hookeri, 
reared by Mr. W. A. Hooker at Dallas, Tex., from Bin pice plialus 
texanus Banks taken from a Mexican dog at Corpus Christi, Tex., 
by Mr. II. P. Wood. Inasmuch as a closely allied if not identical 
tick. Rhipicephcihu sanr/uineus Latr., is supposed to be a transmitter 
of a trypanosome disease in South Africa, sendings of the Hunterellus 
were made in the autumn of 1908 to Prof. Lounsbury at Cape of 
