THE SPINOSE EAR TICK. 63 
Bishopp at Monclova, Durango, Torreon, Aguas Calientes, and Mon- 
terey, Mex. It is undoubtedly present throughout the greater part 
of Mexico and may be found to be distributed through Central and 
parts of South America when systematic collection is undertaken, as 
Fig. 2.—The spinose ear tick, Ornithodoros megnini: Distribution. The large dots show localities where 
the species has been collected in our investigation. The small dots show the probable range of the 
Species. (Original.) 
the Marx collection contains three lots with 15 well developed and 4 
partially developed nymphs, which were taken from cattle in the 
Santa Lucia Mountains of Brazil. The accompanying map (fig. 2) 
shows approximately the normal range of the species in North 
America. 
