14 m<>s(^)vit()i:h 



to iriost i)(3()[)l(i oxtr(;iii(!ly irriiniiii.^. Tliis fjiiiit sound 

 will \Viik(Mi many from ilic- somi(l(!si sl('<'|). it is not loud, 

 juid ill (|ii;ility in;iy i)<'rli;ii)S Ix^st Ix; ('oni[);ir(!d to tli(; dis- 

 tant ii()i<'- ol' a l)a;j;|)i|)('-. TIk; soujid is ai)[)arcntly pio- 

 diicod, as with ili(;s and otli(!i- di|)t()rous insects, not by 

 the ra[)id vi])i-atioji of tlio win<4S, but ])y tlio vibrations of 

 a cliiiinoiis proci^ss in tin; lar^^o tj"a,clH!;(' jiist Ix^hind tlii! 

 tliora('ic S[)ira(*l(;s. Those vil)ratioiis aio pioduccxl l)y the 

 air (buin;^' r<!S|)i ration. ])ia,<j;<)n-llies and bees, as well as 

 flies, sin^'' in tliis way. With bc^es, liow(;v(!r, the ]'a[)id 

 vibration of the win^s causers am^thei- hnni, and the two 

 notes are most r<;a,dily (bstin^uished, the win^- tone of the 

 honey ])ee bein^- A', whil(5 tlio breathin*^- voice is at least 

 an ()ciav(i hi^ln^r, and somcitinies niiu! or ten full tones 

 hii;h(!r, ^oin^ to IV and ('". 'J'Ik; exact musical note of 

 th(! diflere-nt S|)(!ci(;s of mos(|iiito(!S seems not to have been 

 investi.^attid, but as loiii^- jil^o as 1871, A. ]\b M;iyer, in the 

 course of his res(;arches in a(H)Ustics, made souk; most in- 

 tei'(!stin^- (!X[)eriments with the supposed auditory appa- 

 laius of sonn; spcu-ies of (^nlcx, which, unfortunately, was 

 not naincMl. JNlMycr (established the fact that some of the 

 ani(enn;i,l hairs of lln; male moscpiito are auditory. With 

 tuning-fork expciiments he showcul that som(; of the haiis 

 ar(i espcH'ially timed so as to rciSpond to vibrations num- 

 bering;' 512 ])(!r S(;cond. Other hairs vibratcid to other 

 notes. 1 [e- also (^xperinnrntcd with tin; son.^- of the hiuiale, 

 and sh()W(Ml tliat tine aiidiioiy hairs of tlu^ mah; anteniKe 

 vibrat(vwh(Mi the son^' of th(5 female comes at ri^ht angles 

 to tlunn. Jf the son*^'" is diri^ctly in front of the head it 

 will be most fully perceived by the hairs. If the son^^ of 



