THE CANADIAN ENTOMOLOGIST. 289 



Male : length 0.30 



rostrum, same as in female. 



thorax 0.085 ^y °-°4 



J^/rsi larva (apode): o 06 by 0.04 



Second larva (apode) 0.08 by 0.06 



Hexipode larva : o. r 2 by 0.05 



Octopode larva : 0.36 long. 



Ovum : 0.06-0.08 by 0.04-0.05 



rostrum + cephalothorax=one-third to one-fourth of the total 

 length of the body. 

 2. D. f. var. canis. 



Female : length 0.25-0.30 



rostrum 0.03 long, base 0.03 broad. 



thorax o. i o by 0.045 



Male : length 0.22-0.25 



rostrum same as in female. 



thorax o-095 by 0.045 



First larva (apode) : 0.06-0.09 by 0.015-0.025 



Hexapode larva : o. 1 1 by 0,032 



Octopode nymph : o. 1 9 by 0.04 



Ovum : 0.07-0.09 by 0.025 



rostrum + cephalothorax=slightly less than one-half of the total 

 length of the body. 

 J. D. f. var. cati : 



Similar to var. canis, but one-fourth smaller. 



4. D.f. var. caprae. 



Female : 0.23-0.25 by 0.06-0.065 



Male : 0.22-0.23 by 0.05-0.055 



Ovum : 0.068-0 08 by 0.032-0.045 



rostrum -•- cephalothorax^nearly one-half of the total length. 

 Causes a disease in goats similar to that described above in cattle 

 (Nocard, Railhet). 



5. D./. var. ovis. 



Said to differ from var. hominis in having a broader rostrum and 

 cephalothorax (Oschatz). 



6. D. f. var. equi. 



E. Wilson says it is identical with var. hominis. 

 J. D. f. var. bovis. 



length , '. . o, 2 



