155 



aponoiihtiioides, var. u., is described I'lum numerous females taken 

 by Col. r. Raymond from a Himalayan zebu at Beloadiia, 

 Calcutta, in March 1912, in company with Boophilus australis. 



NuTTALL ((I. H. F.). Notes on Ticks, iii. On Four New Species 



of Ixodes. — Parasilolof/ij, vi, no. 2, July 1913, pp. I0I-I08, X 

 4 fio-s. ' ' ^ 



The four new species of ticks described are : — Ixodes Jcerri'pi, 

 found on Sciun/s en/ilirdceiit; itifennedius, at Kobo, 400 ft., India, 

 by S. W. Kemp (Abor Expedition), 29th March 1912. /. davei/i 

 is described from a single female found on a bird {Gcdlircx 

 johistoni) on Euwenzori (6,000-8,000 ft.), Uganda, by S. A. 

 Neave, in November 1911. /. oldi was found on a ' bush-cat ' [a 

 mongoose, Ilerpestes paludosus'\ at Ivomaiendu, Sierra Leone, by 

 J. J. Simpson, 13th August 1912. /. rieinoides was found on a 

 swamp deer and on a musk deer at Wen-chwan-hsien, near Si-ho- 

 hsien, China. 



NuTTALL (G. H. F.). Parthenogenesis in Ticks. (Preliminary 

 Note.) — Farasitolugy, vi, no. 2, July 1913, pp. 139-140. 



The tick, Ainhlyomina agamuni, was raised parthenogenetically 

 through three complete generations upon cold-blooded animals, 

 the natural hosts in Brazil, by Aragao (1912). As no males of this 

 species have as yet been observed, it occurred to Prof. Nuttall to 

 determine whether parthenogenesis occurs in ticks where males are 

 found with females, and in making experiments with several 

 species he obtained a positive result with RJilpieeplialus bursa, 

 which is common on sheep in parts of Southern Europe and 

 Northern Africa. When males and females of this species are 

 l)laced together upon sheep the gorged fertilised fenmles abandon 

 the host after 4-12 days and lay 5,000-7,000 eggs. AVhen females 

 alone were placed upon a sheep they remained upon it for 25-38 

 days and abandoned the host without having fully gorged them- 

 selves with blood. Some of them began to (»vi])osit after a- normal 

 interval of time and many of the eggs shrivelled up. The number 

 of eggs laid per female is smaller (about 2,000) than in females 

 which have fed to repletion in the presence of males. A small 

 proportion of the eggs gave rise to larvae. Other cases of parthe- 

 nogenesis in Acari are discussed by Oudemans (Tijdschr. voor 

 Entom. li, 1908, p. 71). 



NuTTALL (G. H. E.). Rhipicepludiis appendicidatus : Variation 

 in Size and Structure Due to Nutrition. — Farasitolugij, vi, no. 2, 

 July 1913, pp. 195-203, 4 hgs. 



The variability in size and structure of RhipicepJialus has been 

 a cause of much confusion in classification, as noted by Warburton 

 (Parasitology, v. no. 1, 1912). Experiments by the author show 

 that there is a considerable individual variation in the size of adults 

 of R. wppcnduddatus whose development has not been interfered 

 with, while the structural variations in such forms are slight. 



