99 



about 81,0(»0 sind lias only part ially eradicated Iho jx'st, aiul has sliieo 

 bcH'ii constantly on the out look for anni lici- out break. In one instance 

 a stock of ."{(), 000 pounds of leaf tobacco had to be liinii;,S'ite<l in (»r<b'r 

 to destro}' the insect. In this connection it may be said, from our 

 «^\pei-ien<'e in usinijc tbe two irases, cai'bon bisul[)hi(l and hydrocyanic- 

 acid iras, we \\\u\ the latter in i^'cneral to be more effective. I>ut in 

 usin;,' either in fumipitiu'; lai'.!;:e ([Uantities of tobacco done up in 

 cases of o.')'> pounds, it is dillicult for the jjjas to cut irely penetrate 

 the case. In my opinion, tobacco warehouses should be inspected by 

 an entoin()U).iiist, who siiould issue a certificate to show that the build- 

 in <;s are appai'entiy fi'ce from this pest. In this way the man u fact ui-ei- 

 would be protected fi-om sei'ious loss fn purchasing tol)acco that is 

 ildested with the insect. 



Mr. Sander.son stated that the best remedy that he had found foi- 

 Aiitho}i()muH si<jnntus was to bui-n over the sti"awbei-rv beds. 

 yiv. AVashbui'ii next presented a i)aper entitled — 



INSECTS OF THE YEAR IN MINNESOTA. WITH DATA ON THE 

 NUMBER OF BROODS OF CECIDOMYIA DESTRUCTOR SAY. 



By F. L. WASMMi'iiN, .S7. Aiitlioiiii J'ai-I:. Minn. 



IManl-lice of \aiious kinds have been extremely numeious ihis 

 year, notably a .u:i-ain jdant-louse which for a while caused serious 

 alarm among the farmers. It may have been either Xecturophord 

 cen^dlis or A . (jrauarin. It was w<dl taken care of by parasites. 



Kggs of apple aphides liatched in Ajji-il, but a cold snajt with some 

 snow and sleet killed the young lice. 



Two strawberry insects did some damage, Anlhotuninis sitjnofiis 

 Say, and Coriniild'nti sp.? 



A wholesale grocei- in SI . i*aul complained to this olVice of a 1 roul)le- 

 sonn? mite on dried (igs fiom California and di'ied apples from New 

 York State in a storage warehouse. This jn-oved to be. ac<-ording to 

 Hanks, ('(trpinjl iiphits jiassiildrinn Hering. 



This year luis seen numerous leaf-miners on <»ak trees, notably 

 Lillioi-dllr/is JidiiidfJri/d(li lid Chun., which was ext remidy dest met ive 

 on various kinds of oak, paiticularly white oak. in the vicinity of the 

 twin cities, l)ut was not i>l»sei-ved in other parts of the State. 



Specimens of Triholin m (■onfiisn m wei'c sent to tin* laboratory fr<Mn 

 an (devator, and while being used in some laboratory experiments a 

 few escaped; we afterwards found one attacking a dried in.sect speci- 

 men in an imjierfect insect box, n<it an unusual lial)it of this omnivo- 

 rous pest. 



