74 



Tin-: COMMON .M()S()ii'roi:s oi' mixxksota 



pail of water fur trans})ortatii)n tt^ tlie lalxiratorx'. where ihey can 

 be isolated in tubes of water and each one or each kind reared 

 separatel}' to the adult stage. If it is not desired to take them into 

 the laboratorx for study, thev can be dropped into eii2;hty ])er cent 

 alcohol, in which they will remain in good condition for study for 

 a long j)eri()d. Specimens can be remo\ed. whene\cr desired, and 

 l)laced on a slide for study under the microscoiie, or they can ])e 



r.t.rY mo„tk U^sl"', 



Jernaltufl 

 antenna 



Fig. l.-i- -.\',hilt mosquito with 

 I):ii-t= named (from .Smitli). 



"ig. lb- -Mosquito larva with 

 parts named (from Smitii). 



cleared in xylol and mounted in balsam on a microscope slide for 

 ]XM-manent study. The adults are in most ])erfect condition for 

 study when reared from the larvae in th.e laboratory and killed at 

 once. Mosquitoes captured in the oi)en are often so mutilated as 

 to be unrecognizable. As soon as the mos(|uito has emerged, place 

 it in a cyanide bottle and lea\e it there until dead, ^^d^en dead 

 empty it onto a smooth surface, such as a sheet of glazed paper. 

 Never touch the specimen with the lingers and even if forceps are 

 used great care must be exercised not to rub oft' scales or otherwise 



