
= Bia 
Special type of Eumerus-infested narcissus bulb to give mortality." This 
corroborates the previous finds of C. A. Weigel at Babylon, Long Island, 
in the summer of 1929. "A few (preliminary tests ) with ethylene oxide 
for one-hour periods gave 100 per cent mortality of all Eumerus and Mero- 
don larvae." 
Mr. Doucette and Ralph Schopp report: "All stages of Liothrips 
vaneeckei Priessner are killed in the vapor sterilizer with treatments of 
lily bulbs for one hour or longer at 111° F. Paradichlorobenzene does 
not seem effective as a soil insecticide against the thrips in the bulbs 
in the ground." 
A. W. Cressman, New Orleans, La., reports that fig trees "treated 
with paradichlorobenzene * * * are again infested with (three-lined fig- 
The treatment therefore has been of no value." 
Another shipment of citrus leaves infested with Aleurocanthus wog- 
lumi Ashby heavily parasitized with Eretmocerus serius Silv. has been 
received at the Panama Canal Zone laboratory from P. A. Berry of Cuba. 
James Zetek, of the Panama laboratory, says: "By the time these leaves 
reached us, they were at least five days old. Nevertheless quite a fair 
number of parasites were obtained and liberated." In regard to the re~ 
sults of previous parasite liberations, he says: "Parasites were liber- 
ated at Corozal last January, at height of dry season, and last month 
some leaves were taken and parasites emerged not only from leaves from 
trees right next to one where parasites were liberated, but also from 
trees fully a block away. At Fort Amador it is not difficult to get well-— 
infested leaves of lime trees which are thoroughly parasitized, and many 
additional liberations were made from material obtained at that place. 
It is gratifying to note how well the parasite took hold and that it 
thrives here, and I believe I see a real change in the woglumi picture 
at Amador." 
In connection with life-history studies of Anastrepha fraterculus 
Wied. and Toxotrypana curvicauda Gerst., Mr. Zetek has observed a differ- 
ence in the behavior of the larvae of these two fruit flies. "Although 
the frateculus larva is mature 11 days after the egg was laid, it can 
remain within the fruit (mango) for some time longer, depending upon the 
cordition of the fruit. * * * Larvae have been removed from fruit 13, 
14, and even 17 days after oviposition took place. * * * This ability 
to remain within the fruit, quiescent, for some time after fully mature 
is an advantage. When the fruit drops to the ground it breaks open, giv-—- 
ing the larvae the opportunity to escape and pupate. In the case of cur- 
vicauda this does not follow. The larvae can remain in the fruit (papaya) 
for some time after fully mature, but as a rule they work their way out 
of the fruit, fall to the ground, and pupate. They do not have to wait 
until the fruit falls. * * * By working their way out of the fruit 
Many more reach pupation." 
F. S. Stickney, Whittier, Calif., has conducted some tests to 
determine how successfully the date palm mite (Paratetranychus heterony- 
