14 



such cases will only come from extensive improvemeiits at the public 

 expense in tlie way of the ailing in and draining of the marshes. 



One word more in reference to water tanks. The use of kerosene is 

 of course out of the question in such receptacles. A note was pub- 

 lished in I^^SECT Life (yoI. iy, pp. 223-224) to the effect that the in- 

 troduction of carj) into water tanks in the Eiviera was productive of 

 the best results. This is a pertinent suggestion for trial in this country. 

 The TJ. S. Fish Commission can doubtless furnish a hmited number of 

 carp for this purpose. A"J water tanks and barrels should, however, 

 be tightly covered, and only opened occasionally for the purpose of 

 aerating the water. When thrown open for this purpose it will not be 

 difScult to ascertain whether larval mosquitoes (wrigglers) are present, 

 and if so, and the tank is not too large, they can be removed by means 

 of a fine-meshed hand net. 



OCCURHENCE OF BUCCULATRIX CANADENSISELLA CHAMB. ON 

 BIRCHES IN RHODE ISLAND. 



Bt a. S. Packard, Providence, R. I. 



My attention during the second week in September of last year was 

 called to the widespread occiuTcnce of the larvae of this insect on the 

 leaves of Betula ])opidifolia. Over extensive tracts of woodlands and 



_ fields in east Providence and ad- 



__.__ _ ._ joining portions of Massachu 



,-#-riiv^^--^ v-^^^r^-z-'-i ^[^- setts, the leaves of birch shrubs 



-"' and small trees had prematurely 



tiu'ned sere and brown, few 



healthy green leaves on a tree 



having been left. 



'^ Theravagesofthis worm seem 



to have attracted attention else- 



^^- where, as an Attleboro corre- 



^' ; spondent of the Providence Jour- 



. ncd for October 6 reported that 



5 ._^, - • almost every leaf of the White 



$\ \ ^ j^}. Birch in Bristol County, Mass., 



- r ^ had been eaten by a worm; the 



- account undoubtedly refers to 



^: ~ this caterpillar. 



ff x^ y x:// This Tineidwasfirst described, 



_„ . _ -: '^ _ but without anv information as 



Fig. 3. Bucculatrix canadensisella : a, skeletonized 4-^ -f-fo. iToK-i-t-o "Kt- -H-i^k 1q-<-£i IVTv V 



birch leaf: h. pseudo-cocoon: clarva: d. head of ^^ ^^^ UaOlT^, D} lUC laXC IVll. V . 



same ; e. anal segments ot same ; /. anal se£:ment 'p niiom'hpT'a in fliA r'rinnrlinn 



of pupa: ^.cocSon with extended pnpa skin: /I, *• ^liamDClS, lUTne Lauaawn 



moth-all enlarged (original). EntomologiSt for AugUSt, 1875 



(vol. Yii, p. 146). Some time ago Dr. J. A. Lintner wi\:)te me regarding 



