 The English mycologist John Ramsbottom reported that Amanita muscaria was used for getting rid of bugs in England and Sweden , and bug agaric was an old alternate name for the species . French mycologist Pierre Bulliard reported having tried without success to replicate its fly @-@ killing properties in his work Histoire des plantes vénéneuses et suspectes de la France ( 1784 ) , and proposed a new binomial name Agaricus pseudo @-@ aurantiacus because of this . One compound isolated from the fungus is 1 @,@ 3 @-@ diolein ( 1 @,@ 3 @-@ Di ( cis @-@ 9 @-@ octadecenoyl ) glycerol ) , which attracts insects . It has been hypothesised that the flies intentionally seek out the fly agaric for its intoxicating properties . An alternative derivation proposes that the term fly- refers not to insects as such but rather the delirium resulting from consumption of the fungus . This is based on the medieval belief that flies could enter a person 's head and cause mental illness . Several regional names appear to be linked with this connotation , meaning the " mad " or " fool 's " version of the highly regarded edible mushroom Amanita caesarea . Hence there is oriol foll " mad oriol " in Catalan , mujolo folo from Toulouse , concourlo fouolo from the Aveyron department in Southern France , ovolo matto from Trentino in Italy . A local dialect name in Fribourg in Switzerland is tsapi de diablhou , which translates as " Devil 's hat " . 
 The English mycologist John Ramsbottom reported that Amanita muscaria was used for getting rid of bugs in England and Sweden , and bug agaric was an old alternate name for the species . French mycologist Pierre Bulliard reported <a href='been_done' title='1'><mark>having</mark></a> tried without success to replicate its fly @-@ killing properties in his work Histoire des plantes vénéneuses et suspectes de la France ( 1784 ) , and proposed a new binomial name Agaricus pseudo @-@ aurantiacus because of this . One compound isolated from the fungus <a href='drop_aux' title='2'><mark>is</mark></a>1 @,@ 3 @-@ diolein ( 1 @,@ 3 @-@ Di ( cis @-@ 9 @-@ octadecenoyl ) glycerol ) , which <a href='uninflect' title='3'><mark>attracts</mark></a> insects . It <a href='been_done' title='4'><mark>has</mark></a> been hypothesised that the flies intentionally seek out the fly agaric for its intoxicating properties . An alternative derivation <a href='uninflect' title='5'><mark>proposes</mark></a> that the term fly- <a href='uninflect' title='6'><mark>refers</mark></a> not to insects as such but rather the delirium resulting from consumption of the fungus . This is based on the medieval belief that flies could enter a person <a href='null_genetive' title='7'><mark>'s</mark></a>head and cause mental illness . Several regional names appear to be linked with this connotation , meaning the " mad " or " fool <a href='null_genetive' title='8'><mark>'s</mark></a>" version of the highly regarded edible mushroom Amanita caesarea . Hence <a href='dey_it' title='9'><mark>there</mark></a> is oriol foll " mad oriol " in Catalan , mujolo folo from Toulouse , concourlo fouolo from the Aveyron department in Southern France , ovolo matto from Trentino in Italy . A local dialect name in Fribourg in Switzerland <a href='drop_aux' title='10'><mark>is</mark></a>tsapi de diablhou , which <a href='uninflect' title='11'><mark>translates</mark></a> as " Devil <a href='null_genetive' title='12'><mark>'s</mark></a>hat " . 
Da English mycologist John Ramsbottom reported that Amanita muscaria was used fir gettin rid of bugs in England and Sweden , and bug agaric was an old alternate name for the species . French mycologist Pierre Bulliard reported done tried without success to replicate its fly @-@ killin properties in his work Histoire des plantes vénéneuses et suspectes de la France ( 1784 ) , and proposed a new binomial name Agaricus pseudo @-@ aurantiacus cuz of this . One compound isolated from tdafungus 1 @,@ 3 @-@ diolein ( 1 @,@ 3 @-@ Di ( cis @-@ 9 @-@ octadecenoyl ) glycerol ) , which attract roaches . It done been hypothesised that the flies intentionally seek outt the fly agaric fir its intoxicating properties . An alternative derivation propose that the term fly- refer not to insects as such but rather thdaelirium resulting from consumption of the fungus . This is based on thedadieval belief that flies could enter a person  head and cause mental illness . Several regional names appear to be linked wit this connotation , meaning the " mad " or " fool  " version of the highly regarded edible mushroom Amanita caesarea . Hence it is oriol foll " mad oriol " in Catalan , mujolo folo from Toulouse , concourlo fouolo from the dayron department in Southern France , ovolo matto from Trentino in Italy . A local dialect name in Fribourg in Switzerland tsapi de diablhou , which translate as " Devil  hat " .