SEVENTEENTH ANNUAL REPORT, 



441 



Fig. 156.- 

 tas. 



-Capitulum of female E. calcara- 

 After Birula, 1895, tig. 10. 



Rhipicephalus calcaratus^ from Caucasus. 

 (Figures 156-166.) 



Birula examined some ticks collected in Transcaucasus, Occidental 

 Caucasus, and Ciscaucasus, which he described originally as Ixodes 

 calcarahis. The original description is not accessible to us. Later 

 (1895) he described them in detail, giving the following diagnosis and 

 the figures here reproduced: 



Brownish red or yellowish brick color. Body elongate oval. Capitulum hexag- 

 onal, very broad. Eyes distinct, elliptical. Palpi very short, conical. Rostrum 

 [hypostome] armed with 8 rows of teeth. Legs 

 calcarate. Coxse I bidentate. Dorsal porose 

 warts [areas] small. Genital pore situated be- 

 tween coxae I ( 9 ) or II ( ). Stigmate areas 

 sabrotmid, small. Male provided with four 

 anal shields [clypei] . 



Body of the female, if replete, elongate oval, 

 posterior portion back of spiracles narrower, 

 sides of the anterior portion constricted four 

 times at the legs and also at the spiracles, two 

 poriferous dorsal rotund warts [areas] very 

 small. Dorsal shield (scutum) provided with 

 eyes, dispersely setulose, subpentagonal, length 

 almost double the width, anterior angles slightly 

 prominent, rotund, sides of the anterior portion of the scutum subparallel, posterior 

 portion behind the eyes triangular, apex rounded, scarcely longer than the anterior 

 part. Eyes elliptical, slightly convex, protruding very slightly from the edge of the 



rieurs j^ales, presentant de chaque cote de I'anus deux paires de plaques chitineuses 

 arquees, de couleur roux fonce, etroites et egales. Pore genital rond, chitineux, en 

 arriere du rostre a la hauteur de la deuxieme paire de pattes. 



Nymphe. — Longue de 1 a 4'"'", large de 0™'",80, a 2""",50; corps ovale. A, ecusson, 

 rostre et pattes de meme volume et de nieme forme que chez la larve mais ayant une 

 paire de pattes de plus que celle-ci; le tout plus fonce; pas d'organes genitaux, mais 

 des stigmates. 



Larve. — Longue de 0™™,50, large de 0'"",40, corps aplati de forme orbiculaire, un pen 

 anguleux en avant, de couleur roux pale, I'abdomen plus clair; ecusson cordiforme 

 large et court; rostre semblable a celui des adultes, mais plus petit en tons sens; pattes 

 plus courtes et plus greles, a tarse non dente. Pas d'organes genitaux, ni de stigmates 

 respiratoires. 



(Euf. — Long de 0'"'",50, large de 0™™,40, ovoide, de couleur fauve foncee, lisse, 

 luisant. 



Habitat. — Nous avons recueilli cet Ixode en abondance sur des moutons barl)a- 

 resques et touaregs, et sur des boeufs d'Algerie et du Maroc amenes a I'abattoir mili- 

 taire de Vmcennes. Nous 1' avons aussi recueilli sur des boeufs sardes et sur des 

 bceufs auvergnats. Les deux sexes s'y trouvaient frequemment accouples et quel- 

 (jues nymphes y etaient melangees aux adultes. 



^Synonymy and Bibliography. 



(?): Ixodes calcaratus Birula (Russian article not accessible). — Travaux delaSoc. de 

 Natur. de St. Petersbourg, XXIV, 1. 2, p. 137 (not accessible). 



1895: Rhipicephalus calcaratus (Birula) Birula, 1895, pp. 361-363, Tav. ii, figs. 10-20. 

 [See also Neumann, 1897, p. 408, as syn. of Rhipicephalus annulatus.} 



