Volume XIII 
MARCH, 1921 
No. 1 
ON TWO NEW TAPEWORMS FROM THE OSTRICH, WITH 
A KEY TO THE SPECIES OF DAVAINEA. 
By F. J. MEGGITT, M.Sc., Ph.D. 
Assistant Helminthologist , University of Birmingham. 
(From the Research Department in Agricultural Zoology , 
University of Birmingham.) 
(With Plate I and 2 Text-figs.) 
CONTENTS. 
PAGF 
Davainea beddardi n. sp.1 
D . struthionis (Parona, 1885).4 
D . linslowi n. sp.4 
Davainea sp. . 5 
The Genus Davainea .8 
List of species of Davainea and their Hosts .... 10 
Key to species of Davainea .16 
Literature.20 
The material which forms the basis of the following account consists of two 
tubes of tapeworms collected from ostriches at the Veterinary Pathological 
Laboratory, Nairobi, British East Africa. One tube contained approximately 
12 scolices and the anterior portions of the strobilae attached to them, together 
with several fragments of the more posterior portions: these are described 
under the name Davainea beddardi n. sp. The other tube contained one large 
fragment of a Davainea and several smaller pieces but no scolices: these are 
described under the heading Davainea sp. For this material I am indebted 
to Professor G. H. F. Nuttall, F.R.S. to whom I wish here to express my 
thanks. I have also to acknowledge my indebtedness to the Librarian of the 
Royal College of Veterinary Surgeons for allowing me to consult literature 
unobtainable elsewhere. 
Davainea beddardi n.sp. 
The length of the largest fragment was 6*4 mm. and the greatest breadth 
observed 3 mm. 
The scolex (Plate I, fig. 2) is 1*3 mm. diameter, possessing four unarmed 
suckers and a rostellum bearing a double row of approximately 130 hooks, 
each 0-085-0-088 mm. long and of the typical Davainea shape, the two rows of 
Parasitology xm 
1 
