- 10 = ny. 
chus Ewing) would survive on Bermuda grass. He describes these test: 
follows: "“Bermuda-grass shoots were planted in six pots, thorov ly 
cleaned of any possible pests, and 20 to 50 date mites collected 
date fruits were transferred to each one. * * * They settled ianedinlal bi 
after being transferred, appeared to be entirely satisfied with 18 Y 
new environment, and within an hour the majority of them had turned 
their normal creamish color on date palm to a distinct greenish hue. 
were deposited and within seven days they were beginning to hatch. 
Bermuda grass was webbed up extensively, similarly to the way the mite 3 
webs up the fruit of the date palm. Indications are that they are liv 0g 
normally on the Bermuda grass." 






























F. R. Cole, Whittier, Calif., reports: "The mites previously re- 7 
ported as being on the leaves of gerbera have been determined by Banks as 
Tyroglyphus heteromorphus Felt. 
At the request of Prof. Harry S. Smith, of the Citrus Exper ant 
Station, Riverside, Calif., A. C. Mason. of Honolulu, T. H., has made tw 
shipments of parasites of the Mediterranean fruit fly to that station "for — 
the purpose of testing their usefulness in parasitizing the larvae of the © 
walnut husk maggot, Rhagoletis completa Cresson. * * * The first ship 
ment consisted of 100 adult Opius humilis and 900 adult Diachasma Eryoni. — 
** * Half of the insects were placed in large test tubes, containing 
food, and held undisturbed in the vegetable room on the ship, at 50° F., 
and the other half were Kept in the baggage room in care of the chief of- 
ficer of the ship, who fed and cared for them each day en route. They 
were fed on honey and water placed in small droplets on rubber-tree | 
leaves. The first lot arrived in almost perfect condition, while there” 
was a heavy mortality among the others, due no doubt to lack of care by 
an inexperienced man. The second shipment consisted of 100 adult Opius 
and 1,000 adult Diachasma tryoni, and was sent entirely in the cold room 
at SO°F, since the success of the first shipment showed this method oh 
practical. They arrived in perfect condition. Both shipments were re 
ceived at San Francisco by Prof. Smith, taken at once to southern Califor — 
nia by airplane, and released the same day in the infested walnut groves." 

Bearing on the susceptibility of the tomato to fruit fly infesta= 
tion, Mr. Mason reports suspending two lots of tomatoes in an orange tree 
at the Hawaiian Experiment Station. He says: "The trap record in the 
tree for this 24-hour period showed a catch of 84 male flies. At the 
end of the 24-hour pericd the tomatoes were removed to the insectary 
held in individual cans for 20 days. No larvae developed in any of 
nor was there any evidence of oviposition punctures. The experiment wa: 
repeated September 2, with 12 tomatoes. * * * The experiments indicate 
that tomatoes are in no sense a favored host of the fruit fly. Even Sn 
placed in an ideal environment, such as an orange tree containing le 
numbers of flies, only 1 of 19 fruits was attacked. There were no oranges 
er other host fruits near the tree at the time, where oviposition might 
have taken place." Under forced conditions in cages the tomate serves as 
a fly host, but under field conditions rarely, if ever. The effort here 
was to determine whether natural infestation would take place in the — 
temato, if placed in an environment similar to that of fruits no y 
attacked. ot: 
