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trap. Moths, cockroaches, and beetles are caught and decay in the water 
of these places. Eristalis larvae find the rot holes favorable for 
their development and associated with them one finds Culicoides larvae. 
The decayed insects in rot holes furnish food for the larvae of Culicoides 
guttipennis Coq., C. biguttatus Coq., and other species of this group." 
A disease of sand fly larvae.--Mr. Dove also reports that "In micro- 
tome sections of diseased sand fly larvae taken in nature we are find-—- 
ing a protozoan belonging to the Gregarina group. Stages of the organ-— 
ism occur consistently in all material studied in sections. It appears 
that the larvae are able to carry this parasitic burden without a high 
percentage of mortality. Some of the microtome sections show develop-— 
ment of this organism in locations which could undoubtedly cause death 
of the larvae. Some were found associated with ruptures of the gut 
wall, some were found in places which involved the nervous system, and 
still others appeared to incapacitate larvae through mechanical pres— 
sure of abnormal cysts. We believe that when larvae develop many cysts 
this can be detected in the characteristic swimming movement. From the 
standpoint of natural control of breeding of sand flies this discovery 
may not be important. The interesting and important part to us is the 
fact that some of the cysts can pass through the larval to the adult 
sand flies. Such an organism in a midge which bites man causes us to 
question the behavior and fate of these organisms in human tissues. Has 
this protozoan anything to do with some of the skin affections which 
occur so commonly in the coastal areas?" 
Experimental traps catch more screwworm flies in Menard County, 
Tex., than ever before.--S. M. Perry and D. C. Thurman report that "The 
flies caught in 664 traps in the experimental area in Menard County from 
March 1 to April 1, inclusive, amounted to 1,644.8 quarts, and from 
April 2 to April 28, inclusive, 10,548.7 quarts. The catch of 10,548.7 
quarts during the 27 days in April is by far the greatest volume of flies 
taken during any similar period since this number of traps has been 
operated. This increase in volume of flies caught in April * * * appar- 
ently is not owing to a greater local abundance of flies this season, 
but to the change in location of approximately 50 percent of the traps 
formerly located in unfavorable places." 
Soy beans in water attractive to Culex mosquitoes.—-W. V. King, Or- 
lando, Fla., reports: "The collections of Culex eggs at Orlando (made 
for the purpose of determining the relative attractiveness of various 
breeding media) gave the following totals for the month (April): 
Breeding media 
rele) oh ely Bae Gey Oa 410 egg boats, or 13.1 percent 
Manueerinewater.p.st..cal). 10 TO4 Se 4 MAG ee. o ut 
Pip vmaen WatOl);. aie... ieee 485 " M VrLStS . 
Bovepeanae in) WAtOT......0:0.0:. 2,695 " u " 44.7 u 
Check — water alone........... ee) a! : ay 4.1 4 
Meee ee boats? fo. .358...0.0,Le1 
