16 BULLETIN 377, U. S. DEPARTMENT OF AGRICULTURE, 
Audubon Park, New Orleans, with the Nickels sirup in the strength 
as recommended originally, and also double, half, and quarter 
strengths. One gill of sirup was used to a jar, each jar being 
placed on its side to give free access to the ants, to prevent the 
entrance of water, and to prevent mold. The “ Hall” furnished 
ideal conditions for the experiment, the temperature throughout the 
year being kept high and uniform. The abundance of various 
species of scale insects and aphids attracted the ants in great num- 
bers at all seasons, but especially in cold and wet weather. Three 
jars of each strength were used and observations were made fre- 
quently for a period of 32 days. At the time of this experiment 
the ants were very numerous, due to the extremely wet summer of 
1912. The rate of attendance and relative repellent value of the 
four strengths of the poison are shown graphically in the first part of 
Table I. 
TaB_E I.—LHeperiments with sodium arsenite (NaAsO,) added (in four strengths?) _ 
to sugar sirup solution, 1912. 
[Symbols: A= Heavily visited by ants. B=Only attended by afew ants. C=Not attended by ants.] 
FIRST TEST, IN HORTICULTURAL HALL. 
Double strength. | Nickels solution. Half strength. Quarter strength 
BOT AS UR OUR At I SRA AT Ori Sa ened | enna an 
Ay OB le ABB OL Ae AeA ares RT AUS ATs ATS ara ana eat 
Be SBS Be Ba I A igs PS Yate |e aN 
yea Pitas ews beens aa fae a Pei Fe Wao (Re Neeclie Ween ge PN Ij oe 
Boh. CB Bel ea i Are SAE tle pe NS eed ace 
13 QU Orne ee Want| Wan) at WO ieee ae Gee eee UI Ve ge hoy 
T3h| each ae (oar | ie ane EO eee (are. e Ws coNE\. |p on. 
OMe Vane Us al C8 Pl ne Wes Wa PRU genre) en Gate hos 
Be. Bea AAS APE a Eg STS Sa 09 Bt a haat 
TSI A Oe nee Cate aaa Wa Ce) (ape ence) ceed ele ie Sf s 
Ae!) SB Beal 6 Fes al a ie er lene eee 
Cola Mew OG es! WE) bai Gitte Wan ibn sien! SMO Wan Gly UU Woot Lips 
Be AC Be Tay, ie A a el Gale RR ee a ae 
Bebe Ce GAO ai As VAD oN hn calle ve ee 
Te Olam (ELC laal ACG) Ea (a) Nabi (Wass easy PIS tak cctlth her <8 o 
COHn mK Glen cM Mm Ot Wed God We Canoes Celle! Mrgheler A | TA, 
GM ENE Ge be Age Ads I BN ERT eee cas al 
DUPLICATE EXPERIMENT, USING PAPER-BAG SIRUP CONTAINERS TACKED ON FIG 
TREES (OUTDOORS). 
Dniliyg 26M eerie 5 eae ee ciec A A C A A B A A A A C A 
ly posuere mene ves B B C B B B A A B A A A 
ARG 29s ree lee apt tainlaie iatesnieiatn A | A B B A A A A A A A A 
Afni CUE eee at aear een ipie. A B C C A A A A B A A A 
ADU Rea as Ai ES eae C B C B A B A A A A A A 
PAUISTISIAbe sachs oe Lone kee C A C B B A A A A A A A 
AI SUSHI Se eet ace nae Cc C C ¢ B A A A A A A A 
NIT CUISH OFA ee or tease sae ee B Cc C A A A A A A A A A 
PAITORISTO seers eine ne ewe icter. A A Cc A B B A B A A A A 
TRUSTS EO is sa ae i A A C A A A A A A A B A 
MISUSE ee alc 3 B B C A A A A A A A A A 
VIC TISE MG aE ae ake Meee B Cc A A A B A A A A A A 
EANIOUIS GPO serves ees hentai ee B B ¢€ A B B A A A A IX A 
IN CG TTS BPA Ney eR ee a (e Cc B B A Cc A A B A A A 
ATTA D IRCA ete ase aa erese B C © A A B A B A A B A 
INS TVG US 7G a lic eh a A © B A A A A B A A A A 
IAL OMS UO Bee cacao aaa A B CG A B Cc A A B A A A 
PA USUI Ol eise ee elise scenic A A C A B B A B A A A A 
Lpouble strength= {222 "224 10 pounds granulated sugar + 5 pounds H,0+ 1 ounce NaAsOnz. 
Nickels solution______-___ 10 pounds grarulated sugar +5 pounds He0+ 4 ounce NaAsOs. 
Eraittstreno bhi ss ioe Sos OL 10 pounds granulated sugar +5 pounds H.O0+ 4 ounce NaAsOs. 
Quarter strength___.______ 10 pounds granulated sugar +5 pounds H20+ 4 ounce NaAsOs. 
Ae 
