106 



Animals of the Transvaal Museum. 



be placed tog'etlier in a separate genus. The name Margaropiis was 

 given to tlie genus because this name had been given by Karsch to a 

 form from Chili prior to the proposing of the generic term Boopliilus 

 by Curtice in 1890. As it happened, the form which Karsch named 

 (J/, iventhemi) was a monstrosity, of one of the varieties of A^. 

 ann ulattis ; the legs of the male individual were very flat and dilated 

 as in the male of Jounshu fyi ; but according to article 27, of Inter- 

 national Rules of Zoological Xomenclature, Ma rgaropus has the 

 priority over Boopliilus , since it refers to the part of the species 

 named first.* 



Males. 



A. Four anal plates, free in front of anus; legs sub-cylindrical. 

 B. Hypostome with six rows of teeth ; anal plates pointed 

 at posterior tips ; caudal appendage blunt, but always 

 present ... ... ... ... annulatus decoloi^atus. 



BB. Hypostome with eight rows of teeth ; anal plates square 

 cut at posterior ends ; caudal appendage small and 

 conical, often absent ... ... annulatus australis. 



A A. Two anal plates, united in front of the anus; articles of 

 legs very much dilated, articular angles deep... lounshuryi . 



Females. 



A. Articles of legs sul)-cylindrical ; spur short, ambulacre sub- 

 terminal. 



B. Hypostome with six rows of teeth ; mandibles with lesser 

 process bicuspid ... ... anm/Jatus deeoloratns. 



BB. Hypostome with eight rows of teeth; mandibles with 

 lesser process tricuspid, centre of shield usually 

 yellowish ... ... ... ... (rnn i/hifus australis. 



AA. Articles of legs dilated at distal extremities; spur very long, 



ambulacre inserted at dorsal border of spur, remote from the 



tip ... ... ... ... ... ... ... lounshuryi. 



Nymphs. 



A. Shield as wide as long^ ... ... ... ... lounshuryi. 



A A. Shield longer than wide ... deeolorafus and probably 



australis. 



Jjivvce. 



A. Coxae I ])icuspid, three pairs of stigmatic openings 



australis. 



A A. Coxae I without teeth, four pairs of stigmatic openings. 



deeoloratns . 



*Id "Bericlit iiboi' den XIV Inteniatioiialen Kougress flir Hygiene unci Deniograi)hie, ' 

 II, ]). 179, appears a i)ai)er by ]!;>iiit7. in which he treats of the ticks transmitting Texas fever 

 or redwater. He claims that tlie si^ecimeii ui)()n whicli Karsch faunded his genus Marnd rojms 

 was not a monstrosity, as claimed by Neumann, ))ut is in every wny identical with the 

 species ^^. lounifhin-i/i, Neumann. If this is tlic case, we must tlicn retain the genus 

 Bod/iJiihix, our bhie ticks becoming Bxqyhil lis (nniiihit)is (lriu>](nuifns\\\\(\ Jioopliil iis (tninilafiii? 

 auf<tr(ili>>, while M. lov iishiiriji l)ecomes only a, synonym of J/t/ 1 (/// ro/ivs (rf ntheini, Karsch. 

 The question now arises as to liow tliis J/, irpii'fheiul came into l*'outh Africa from South 

 America. Undoubtedly it was l)ix)ught out some years ago on Argentine horses. 



