22 STUDIES ON ACAEI. 



Elongated LarTal Form. 



Total lengtti (incl. capiUiUim) of longest specimen 430 ;i 



Greatest width of body 48 ^ 



„ „ capitulum (at base) 25 fi 



Length of capitulum 22 fi 



Elongated Nymplis. 

 Total length (incl. capitulum) up to 410;i 



Canestrini gives the following measurements of the Demoflex occur- 

 ring in human beings : — 



Adult Form. 



Total length 284 /i 



Greatest width . . , 55 /x 



Length of ceplialotliorax 100 ax 



The following average measurements of this species are given by 

 F, Gmeiner in his paper on Demodex: — 



Total length of body .... 



Length of capitulum .... 



Width „ „ .... 



Length of thorax .... 



Width „ 



Length of abdomen ..... "25 



Length of egg "08 mm. 



Width „ -04 „ 



Length of six-legged larva . . , . "12 „ 

 Width „ „ „ .... -05 „ 



Length of nymph •SB „ 



Width „ -04 „ 



Mcgnin's measurements (in mm.) of D. folliculorum are as follows: — 



Total length of body 



Length of thorax 



Width 



Length of capitulum 



Width (at base) 



Host : Man. 



