attention devoted to this subject and to teratological specimens 

 in some schools, that no other such observations concerning this 

 common and widely ranging tick have been reported. 



Tick feeding from tick ; A male with its mouthparts inserted 

 in the integiiment of an engorged female has been described by 

 Sharif (1930). /~In Egypt we observe that males of various tick 

 species insert their mouthparts into the female body cavity when 

 the latter is engorged and both are confined in tubes for several 

 days after having been collected. This is especially common among 

 specimens of B. annulatus (= B. calcaratus ) .7 



Comparative measurements (" allometrie " ) of sexual variations 

 among the Ixodidae have been investigated by Chabaud and Choquet 

 (1953). For the kennel tick, the length of the adanal shields 

 and the spiracular plates in relation to the tick's length is 

 logarithmically illustrated. Because of sexual and nutritional 

 dimorphism, these authors consider ticks as important biometric 

 tools. They also believe that certain cases of intersexual ticks 

 may result from nutritional allometry. If a male structure is 

 similar to that of a female it has an isometric growth, but if 

 different an allometrie growth. 



Variation in body size and morphology parallels that already 

 discussed under R. appendiculatus (page 0I4) and the same comments 

 apply. This subject nas been studied by Cunliffe (191/hA.) and 

 Pervomaisky (1954). See also remarks londer IDEM IF IC AT ION, below. 



Growth and increase in size from stage to stage and with 

 adult engorgement has been noted by Campana-FLOUget (I95'i+). 



Internal anatomy was briefly described and diagrammatically 

 illustrated by Regendanz and Reichenow (19A-1). 



Haller 's organ of this tick (= R. macropis ) has been illus- 

 trated by Schulze (,19Al). 



Ovi position and the larva have been described by Samson 

 (I9O8). Included in this report is a sketch of the female laying 

 eggs, a generalized discussion of the subject, and a short des- 

 cription of the morphology, including the internal organs (illus- 



_ 719 - 



