«2 
TROPICAL AND SUBTROPICAL INSECT INVESTIGATIONS 
C. L. Marlatt, In Charge. 



































r, R. S. Woglum has recently given a resume of the results of his work on 
sontrol” before the meeting of the Lemon Men's Club at Los Angeles. It is 
that an elaboration of this paper will be shortly presented for publication 
ers' Bulletin, Mr. Woglum has also presented a preliminary report on the 
te (Stigmaeopsis celarius), which has been damaging certain dwarf bam- 
outhern California. Sulphur control seems feasible and easy. 
Howard, who has recently inspected Mr. Yothers’s work in Florida, reports a 
eral and hearty appreciation of this work on the part of Florida citrus 
_Pemberton's continued investigation of the parasitic control of the Medi- 
fruit fly (Ceratitis capitata Wied.) in Hawaii confirms the suspicion 
later introductions of additional parasites of the fruit fly have been 
etrimental +o parasitic control of this pest, due to the antagonistic rela- 
f these parasites. In other words, the very efficient work of the Opius 
3, the first parasite to be successfully introduced, has been considerably 
ed by the work of two species of Diachasma, also very efficient parasites but 
aing up to the efficiency of the Opius, and by this antagonism actually reduc- 
otal amount of parasitism effected by the Opius alone. This outcome has a 
beresting and important bearing on all problems: of parasitic introductions. 
r interesting features are being brought out in this study of the parasitism 
fruit fly, the favorable climate and the abundance of waterial giving an ex- 
11. opportunity for the study of many phases of life history, habits and host 
ns. | | 
ftruit-fly survey is being organized for 
Will be the leader in this survey, and perhaps one or more of the Washington 
$ in this section may be detailed to take up special phases of the work for 
eks each. It is hoped also to get the collaboration in this survey of 4 
‘the official entomologists of the regions covered. 
Horton is collaborating with the Federal Horticultural Board 1 
n work of the Department with headquarters in Washington. 
the West Indies and Central America. 
ao the plant 

TRUCK GROP AND STORED PRODUCT INSECT INVESTIGATIONS 
, PF. H. Chittenden, In Charge. 
uehniella Zell.) has attracted more 
The Mediterranean flour moth (Ephestia k 
ation during 1916 than for several years. It has made its appearance in ware- 
and mills where it was not formerly found. The list of localities includes 
all towns and cities. It is interesting that while formerly when this 
was so very abundant nearly all millers knsw the insect as the Mediterranean 
sh, at the present time they refer to it as "weevil," "flies," and infested 
_is seldom accompanied by other species of insects. One correspondent 
l s, apparently these hatch, and a worm 
which takes a very little time to 
and interfering with the flow of 
23, "We are worried with a fly that lays 688 
s in all elevators and spouts, causing 4 web 
cups and spouts, causing web in the flour, 
a : 
Angoumois grain a 
: oth (Sitotroga cerealella Oliv.) is the subject of 
laint, especially in Pennsylvania, in York County, 
injury being chiefly to 
