Vol. XXvi] ENTOMOLOGICAL NEWS. 125 



deep blown in the middle. It was expected that the water 

 would disappear by seepage, the hole being afterwards filled 

 with large stones. From observations made at the two lo- 

 calities where it was tried it can be stated that the results 

 were unsatisfactory. 



Several creeks receiving sewage from adjoining sections 

 furnished most of the open air breeding places. Along the 

 edges where the water had come almost to a standstill, on ac- 

 count of broken banks and storm-broken trees, great colonies 

 of Culex pipiens were observed. Some of these colonies were 

 from one to two feet long and a foot wide, the larvae being 

 so close to each other as to discolor the water and form a 

 solid mass. In some sections a few men were employed to 

 clear out the tree stumps and establish a better flow of water. 



At one time large swarms of mosquitoes were observed at 

 one of the sewer outlets. Upon investigation it was found 

 that a wheelbarrow, which had been left by one of the work- 

 men about 30 feet inside the sewer, was impairing the flow 

 of sewage and forming a breeding pool. 



In the southern part of the city a chemical factory discharg- 

 es its waste water into the meadows and this favors the breed- 

 ing of saltmarsh species. Several small pools in this section 

 formed by heavy rains only and a pool in a dye-polluted creek 

 contained millions of larvae of Aedes so Hi titans and A. taen- 

 iorhynchus. Psorophora ciliata was found abundantly in 

 swampy parts in company with Aedes sylvestris and Culex 

 pipiens. Only a few specimens of Aedes jamaicensis and 

 Aedes triseriatus were collected and Aedcs canadensis, Culex 

 restitans, Cnlcx salinariiis and CoqneUiitidia pcrtnrbans were 

 found scattered in the suburbs. Anopheles punctipcnnis lar- 

 vae were found in all of the smaller runs, in cattle footprints, 

 in meadows and near stables, often breeding in the same re- 

 ceptacle with Culex pipiens. 



A Preoccupied Specific Name in Tipula (Dipt.). 



Having inadvertently applied the name snspcctu t<> a iic\vl\ desrn'U-d 

 species of '1 if>nhi in my recent paper, entitled "On the llelies GPUIP <>\ 

 the Dipterous Genus Tipula Unnueu-," the name heing preoccupied by 

 Tipula suspccta Loevv, I wish to apply the name Tipula afflict a fur the 

 species in question. W. G. DIETZ, Hazleton, Pa. 



