224 MUSQL'ITUES 



reading-gluss four inches in diiimctov, with u stron.sf han- 

 d\v, which 1 tind very usei'ul in exaniiiiin<4' the surface of 

 water-pools, especially for Anopheles larva-. The dip- 

 strainer used is an ordinary cheap cotiee-straini-r which 

 has been mounted upon a long- handle, so that one can 

 reach out two or three feet from the shore and caj^ture 

 larvae and i)upa\ Other larger strainers with a fine mesh 

 arc sold at the hardware stores and may l)e purchased 

 cheaply. In bringing- larvic and pup;e in from the tield, 

 tt)o much jarring- about in a bottle may residt in their 

 death by drowning. It is desirable, therefore, to put 

 moss or water- weed in the bottle with a minimum of 

 ■Welter, provided the insects are transferred to an aquarium 

 or a still jar within a few hours. 



Nuttall, Cobbett, and Strangeways-Pigg, who have done 

 a great deal of collecting of mosquito larviu in England, 

 as shoAvn in one of their important papers, entitled 

 " Studies in Ilelation to Malaria," i)ublished in the Jour- 

 Hdl of Ilyii'tene, vol. i.. No. 1, January, l!)Ul, used as their 

 collecting apparatus some wide-mouthed bottles of me- 

 dium size with cork stoppers ; a white enamelled dipper 

 which, when required, can be tied with a piece of twine 

 to a long bamboo r(jd ; a small i^ipette with a rubber bulb 

 and small vials containing dilute alcohol for tlu^ preser- 

 vation of larv.e which they did not wish to kee}) alive. 

 They travelled over England on their collecting" trii)S on 

 bicycles. When the larvae or eggs were captured in the 

 porcelain di[)pers they were removed with a pipette and 

 put in bottles, which were half tilled with water, wrai)ped 

 in cloths, and attached to the bicycle frame. They found 



