REPORT ON AIOSOUITOES. 367 



Another smaller breeding place is on the south side of Fifth 

 avenue opposite the park and on the west side of the Morris 

 Canal. This is the remnant of an old pond and needs only a 

 few loads of dirt to fill it. 



The old sunfish pond on Bloomfield avenue, which was a very 

 bad breeding place for a variety of species, is now being made 

 forever safe with ash filling. But on the south side of the avenue 

 is another bad place, which the very filling above referred to will 

 have a tendency to increase in extent. A small, spring-fed 

 brook runs through this place and into the sunfish pond. When 

 this pond is filled and the drainage blocked, this little brook must 

 spread out to cover a surface great enough to absorb the water. 

 The stream is not large, but it has no outlet, and the surface 

 water from the avenue is in addition led into the depression. 

 Just what disposition should be made of this place is not clear. 

 Culex cantans, canadensis, pipiens and sylvestris ; Psorophora 

 ciliata and the species of Anopheles all breed here and the place 

 is therefore dangerous at all except the very driest times. 



Along the east side of the Morris Canal between the north 

 end of Branch Brook Park and the Greenwood Lake Branch of 

 the Erie Railroad are a few bad breeding places formed by see- 

 page through the canal banks. Coming from this source the 

 water supply is almost continuous, and this carries with it also the 

 constant breeding. The depressions in which this water lodges 

 should be filled or the canal bank improved. 



A place which breeds millions of C. pipiens each year is an old 

 sand pit at Thirteenth avenue and Twentieth street. Rain water 

 drains into this place and evaporates very slowly ; so there is some 

 water there at almost all times, forming an ideal place also for 

 Anopheles in late summer. Filling seems to be the only remedy 

 indicated here. A similar place is at Seventeenth avenue and 

 Nineteenth street, where some fifteen cart loads of dirt would 

 effect a cure. From these places and from the swamp on Thir- 

 teenth and Fourteenth streets. West Side Park gets its main 

 supply of mosquitoes. This swamp area is to be filled in during 

 the winter of i904-'o5, the swamps between Eighteenth and 

 Springfield avenues and Fourteenth and Sixteenth streets are 

 already filled and this will very materially lessen the number of 

 mosquitoes in that section of town. Other breeding places that 

 are in process of cure are on Springfield avenue between Six- 

 teenth and Seventeenth streets, where low lots are being graded 

 and breeding holes filled. 



•Another swampy area which breeds many mosquitoes is south- 

 west of Woodland Cemetery. It is proposed to run a street 



