io6 



SCIENCE-GOSSIP. 



TICKS AND "LOUPING-ILL." 



By E. G. Whkleu. 



(Concluded from page 50.) 



IXODES PLUMBEUS. (?) /. HEXAGONUS kindly assistance, assures me that it is a variety of 



var. (?) Ixodes hexagtmus, but there seem so many differences 



A T the time of the attack of /. rcduvius on the between the specimens to which he assigns this 



"**■ sheep, large quantities of ticks were present on name, that I hesitate to think further investigation is 



the shepherds' collie dogs. Being assured that these unnecessary, 



never reached the size of those on the sheep, they The name of /. plumbeus was assigned to it on 



Fig. 14; — Ixodes plumbeus. 5 a (in balsam). /; dorsal aspect. 

 c coxa of fore legs, d tarsus of foreleg, t eapitulum enlarged. 



were examined, and it was at once evident that they 

 were of a different species. Its right name is doubt- 

 ful. I'rofessor Neumann, to whom I am indebted for 



Fig. 15. — Ixodes pltimheus. 



in balsam. 



a larva. b eapitulum 



enlarged, c fore leg. 



d pupa. 



e eapitulum enlarged. 



y"coxa of fore leg\ 







