SC/ENCE-GOSS/J\ 



49 



lihick. When about to lay eggs, with yellow or grey 

 irrt.^;iiliir lines or markings on the back and sides. 

 OiiL- large yellow spot im<lernLatli. (Kig. 8.) 



The following are the proporlionale ineasiirenients 

 of various pans of the adult female, including the 

 joints of each leg. Unit adople<l 50 1 mm. .m 

 12 one hundredth of an inch approximately. 

 Lcn^'th 164 KoHtrum 28 Pnlpt ^6 Spir.lclcH jo Shield 7,{ 



l.fn^lh 4u RoNtrum (I P;ilpi8 Shield 16 



llr 



aJth 



m 





H 



1 >2 





, 



16 





U 



tf* <t 



Hi) 





t»a 



16 



28 



'4 



33 



40 











16 



10 



10 



10 



9 



8 





(iiul) 





J4 



■6 



10 



ao 



16 



36 











M 



1 J 



. lu 



10 



9 



8 





'.■j 



rJ) 





.•IS 



16 



H 



jj 



JO 



.•» 











If) 



ij 







<) 



)i 



7 





I4 



h) 





j6 



-•J 



36 



j8 



1 



.1' 











16 



10 



<■) 



9 



6 



N 



(a Includes 8 lor Icnffth of spine.) 



.Ani'i.r Male. — Length ahout 2-57 to 2 -So mm. 

 Ciisae of anterior legs furnished with a shorter spine 

 than the female. I'alpi and rostrum much shorter 

 and wider than in the female. Rostrum ha.s six 

 harljs, chclifers five hooks. Hody dark brown, almcst 

 lilack, with light brownish white margin. .Mouled 

 wilh very obscure deep reddish irregular markings 



'"''**-. 



^ 



Fitf. S fenmlc 



1 



FIG. 7. 



Ixodes rfditvitis, 

 Fip. 6 female. Fig. 7 female in Balsam, 

 distended with ova. 



that are difficult to see, even when magnified (fig. 9 : 

 the same in balsam, fig. 10). 



Lentfth 140 Rostrum 12 Palpi 18 Spir.ncles 16 Shield 108 

 Breadth 80 " 



Legs(ist) 



(jnd) 



(.ird) 



(4th) 



(a includes 4 for length of spine). 

 Larv.v. — Length o'8o mm. undistended, to i'43 

 mm. distended. Rostrum with ten barbs, chelifers 

 with four hooks. Body more transparent, marks very 

 similar but fainter, and olive-green. Legs, rostrum, 

 etc., testaceous. (Fig, 11.) 





8 









10 





L 



16a 



10 



r8 



16 



■4 



28 



B 



12 



8 



10 



10 



10 



8 



L 



16 



10 



12 



12 



10 



iS 



B 



12 



8 



8 



8 



8 



6 



L 



16 



12 



\b 



'4 



12 



20 



B 



'4 



10 



8 



8 



8 



6 



L 



18 



16 



24 



20 



16 



24 



B 



"4 



8 



8 



8 



8 



6 



Bre.-idth J4 



lei{»(iM) 



12nd) 

 I.Kd) 



18 



*5*A^ 



L 4 



H 4 



I, o 



H 4 



1. 6 



I! ^ 



^«.A^'' 



^ 



-^If 



Ixodes ycdin'itis. 



Fig. 2 adult female. Fig. 10 male in Balsam. Fig. 1 1 Larva. 



KIG. '2 Pupa 



I'l'i'A. — Length I '50 to I -68 mm. undistended, to 

 3-30 when distended. Rostrum 12 to 14 barbs, 

 chelifers five hooks. Body olive white, transparent, 



/ i('(/<.s" I'tdtti'ius Fctnnic nud Ji^^s, 



with four distinct brown posterior intestinal marks. 

 Also similar anterior marks leaving a paler centre 10 

 the shield, which is shaped like an arrow head. When 

 distended the body is of a uniform black. Legs, 

 rostrum, etc., testaceous or brown. (Fig. 12.) 



ength 76 Rostrum 12 Palpi 16 



Spiracles 



8 



Shield 32 



Sreadth 42 ,. 4 



4 







7 



28 



Legsdst) ... L 



lO 



6 



10 10 



8 



20 



B 



8 



6 



6 6 



<) 



5 



(2nd) .... L 



8 



7 



S 8 



7 



12 



B 



6 



S 



4 4 



4 







(,rd) .... L 



12 



8 



10 9 



S 



12 



B 



8 



6 



.i .S 



4 



4 



, (4thl ... L 



10 



10 



12 12 



10 



16 



B 



8 



b 



.^ 5 



5 



4 



.■\fter attachment to the host both the lar\'a and 

 pupa become replete with blood, black in colour, 

 fully distended, and with the exception of size, closely 

 resemble the fully distended female in general 

 appearance. It is to be noticed that the size of the 



