9% 
R. W. Wells, Galesburg, Ill., states that on October 16 he "made 
, post mortem examinations of about 30 head of horses slaughtered at Rock- 
mee ford, Ill. Practically all of the maturing (Gastrophilus) larvae had 
left the horses. About 90 per cent of the new generation of larvae were 
- found in the anterior end of the duodenum. In some cases where the stomach 
_ was practically free from larvae, the anterior end of the duodenum was 
_ heavily infested. No larvae were found in the oesophagus or pharynx." 
0. G. Babcock, who is engaged in investigations of goat lice at So~ 
_* nora, Tex., reports results of an experiment in dipping sheep for control 
_ of the sheep tick (Melophagus ovinus L.) as follows: "Two sheep having a 
_ light to medium infestation were dipped in vat containing Derris extract, 
at a dilution of 1 to 700. Two more sheep were dipped in the same mater= 
ial at a strength of 1 to 500. All animals were held in the vat for l 
Minute at a dip temperature of 64,5° F. No injury to the sheep was noted, 
- Forty-three hours after dipping examinations were made as follows: Derris 
--extract, 1 to 500-—all flies, 36, were dead, with the exception of one 
“young one that had just emerged from the pupa, which was alive and active; 
Derris extract, 1 to 700-~all flies were found dead after a period of 43 
hours. From these sheep 41 M. ovinus adults were found dead after 43 hours." 

W. E. Dove, Charleston, S. C., reporting on breeding places of sand 
flies, says: "From cages located about ditches at Savannah, sand flies 
emerged for periods of more than five months." Concerning treatments for 
--sand-fly larvae, Mr. Dove and assistants report: "Following treatments 
-- of concentrations of sand—fly larvae near the city of Charleston, periodic 
- collections have been made of soil samples taken from such areas. These 
- samples continue to furnish evidence that more than 95 per cent of the 
~ larvae were killed by spraying the areas with phenolized sumpage water. 
4 * * * The spray used in our treatments consisted of one part crude 
~Carbolic acid to 19 parts of sumpage water. The crude carbolic acid goes 
-into solution with the resinous sumpage and is then soluble in salt water. 
The spray was used at the rate of 50 gallons to 12,000 square feet of 
_ ‘marsh. The cost was 4.4 cents per gallon, which included only the price 
Of the crude carbolic acid." 
STORED PRODUCT INSECTS 
Wallace Colman, Silver Spring, Md., reporting on the use of par- 
- adichlorobenzene against moths in clothes closets, states; "All avail- 
' able closets have been used during the month for fumigation tests. The 
- work with paradichlorobenzene has been conducted mainly along two lines: 
~ Short—period fumigation (72 hours) and relatively high concentrations 
of the vapor, and continuous fumigation with low concentrations. The 
latter has shown up remarkably well as a protection against damage by 
*- clothes moth larvae." 
Newell E. Good, Sligo, Md., reports that his work during the past 
‘ i summer has added approximately 2,000 specimens of stored—-product insects 

to the Bureau's collection. 
