— 52 — 



with dots, almost exactly correspontling to the initUUe line on 

 venter. Eight legs. Spiracles conical, rather more prominent, 

 posteriorly inclined. Length (including rostrum), 3 mm.; greatest 

 anterior width, 2 mm. Two alcoholic specimens. Color noted in 

 life. 



£gg (?). — This is apparently the egg. Whitish, pyriform in 

 shape, slightly flattened, wider anteriorly, rounded posteriorly, 

 perfectly smooth, with a median teat like anterior ])rojection 

 which represents the larval head and mouth parts. Length, 4 

 mm.; anterior width, 2.33 mm.; posterior width, i mm.; width at 

 posterior two-thirds, 2 mm.; thickness, 1.75 mm.; length of head 

 case, nearly i mm. One alcoholic specimen. Color noted in life. 



JV(}t(\ — 'I'he above stages are simply those represented in the 

 material in hand. They are not necessarily the consecutive stages, 

 representing consecutive moults, though it is quite probable that 

 they are such, and are correctly numbered, omitting the first, or 

 larval stage. The second stage above described is probably the 

 first eight-legged or nymph stage. It may be well to note that 

 immersion in alcohol for two years turned the third, fourth and 

 adult stages to a reddish or dark brown. 'Lhe second stage pre- 

 served its whitish appearance, except that it was turned slightly 

 yellowish. 



Horses infested with these ticks are given to repeated shaking 

 of the head at irregular intervals, which sometimes dislodges the 

 ticks. When badly infested, animals have been known to roll as 

 well. 'Lhe ticks can be extracted with a pair of forceps, the horse 

 usually submitting cjuietly to the operation, but it is necessary to 

 cast some animals before operating u])on them. A mixture of 

 twenty parts of sweet oil to one of laudanum is sometimes poured 

 into the ear as a remedy, which is of doubtful efficacy. 'Lhe sweet 

 oil alone is probably about as effective. l'"ish oil would doubtless 

 give good results. Kerosene should never be used, unless in 

 emulsion. Pure, it has been known to cause temporary deafness. 

 Train oil, sometimes called British oil, poured into the ear is cjuite 

 highly recommended, and will doubtless prove very effective. 



Dr. Wm. B. Lyon, of Las Cruces, informs me that he has on 

 several occasions extracted this same tick from the ears of children 

 in this neighborhood. He recommends a little chloroform or car- 

 bolic acid in sweet oil, or dusting of calomel into the ear for ticks 

 infesting horses. 



