588 MEDICAL ENTOMOLOGY 



From the above it will be noted that O. savignyi has four nymphal 

 stages ; the period from the egg to the adult is about eighty-four days, 

 and during this time it feeds at least seven times. 



A female and two males, which had emerged on 30-10-1911, were 

 kept together in the same petri dish ; the following data give the number 

 of feeds and eggs laid. 



10 11 11 .... Female fed for the first time. 



15 11 11 .... Second feed. 



28 11 11 . . . : Egg laying began ; when completed 106 eggs were 



collected. 



21211 .... Third feed. 



4 12 11 .... Began laying second batch of eggs; when com- 

 pleted eighty-one eggs were collected. 

 5 112 .... Fourth feed. 

 19 112 .... Fifth feed. 

 28 1 12 .... Began laying third batch of eggs ; eighty eggs 



were collected later. 



1 312 .... Sixth feed. 

 8 3 12 .... Began laying fourth batch of eggs ; 250 were 



collected later. 



27 412 .... Seventh feed. 

 16 5 12 .... Began laying fifth batch of eggs ; 200 eggs were 



collected later. 



26 612 .... Eighth feed. 

 311012 .... Ninth feed. 



10 11 12 .... Began laying sixth batch of eggs ; 195 eggs collect- 

 ed later. 

 26 12 12 .... Female died without laying any more eggs. 



The two males died on 1-3-12 and 10-4-12 respectively; they fed 

 in all four times. The above observations will give some idea of the 

 length of life and egg laying capacity of this tick. 



Ornithodorus moubata, Murray. Adult (Plate LXXIV, fig. 6). Body 

 almost as broad anteriorly as posteriorly, covered with non-contiguous 

 mammillae, but with fewer hairs than savignyi. Basis capituli broader 

 than long and shorter than the palps ; hypostome with six principle 

 rows of teeth. Tarsi of legs I, II and III with three humps as in savignyi; 

 those on the protarsus are sub-equal, more pointed and about equidistant, 

 while those of savignyi are unequal, less pointed and not equidistant. 

 The tarsus of leg IV of moubata is shorter and thicker than that of 

 savignyi, and its humps are nearly equidistant. Eyes absent. Length 

 8 to 12 mm. ; breadth 6 to 10 mm. 



Ornithodorus moubata is found in the following regions of Africa : 

 From British East Africa to the Transvaal, and across to the Congo ; 

 southward to German East Africa and Cape Colony. It is common 



