Vol. xxvi] 



ENTOMOLOGICAL NEWS. 



215 



heavily infested with ticks. The inner side of both ears* was 

 a thick mass of attached Dermacentor nit ens in all stages of 

 development from small larvae to engorged adult females 

 but the majority consisted of nymphs. Of the number taken 

 from the ears twelve engorged and partially engorged females 

 was separately weighed and measured and placed in separate 

 petri-dishes numbered consecutively from I to 12. 



The state of engorgement of each tick was noted, as owing 

 to the mule's condition it was condemned and killed, making 

 it impossible to secure a sufficient number of females that 

 were fully engorged, but of the twelve selected eight were fully 

 engorged and would undoubtedly have very soon detached 

 themselves if they had been left on the ear and the mule not 

 been killed. 



The ticks were observed and noted as being: 



Tick No. i Fully engorged. 



Tick No. 2 Fully engorged. 



Tick No. 3 Partly engorged. 



Tick No. 4 Fully engorged. 



Tick No. 5 Fully engorged. 



Tick No. 6 Fully engorged. 



Tick No. 7 Nearly engorged. 

 Tick No. 8 Fully engorged. 

 Tick No. 9 Fully engorged. 

 Tick No. 10 Partly engorged. 

 Tick No. ii Partly engorged. 

 Tick No. 12 Partly engorged. 



The weights and measurements of the twelve females varied. 

 The largest one, being fully engorged, weighed .2199 gram, 

 and was II mm. in length, 8 mm. in width, and 5 mm. in height. 

 The smallest being but partially engorged, weighed .0607 gram, 

 was 7 mm. in length, 5 mm. in width, and 3 mm. in height. 

 The combined weight of the twelve ticks was 1.2963 grams. 



The weight and measurement of each tick was noted as fol- 

 lows : 



*Note. The ears contained so many ticks and were such good speci- 

 mens to show a severe infestation of D. nitens that upon the death of 

 the mule one of the ears was removed and preserved and has now been 

 sent to the Panama-Pacific Exposition at San Francisco. 



