or ready-formed chryfalis than an ovum. The Hip- 
pobofea hirundinis may be generally found in con- 
fiderable plenty in the nefts of Martins and Swallows, 
and not unfrequently on the birds themfelves, efpe- 
cially thofe which have lately left theneft,or have not 
attained their full growth. The fize of the infedfc 
mull: of neceflity render it extremely troublefome to 
the birds thus infefted, to which it is enabled at 
pleafure to adhere by means of the peculiar con¬ 
formation of the feet, each of which, in this genus, 
inftead of being furnilhed with two claws only, as in 
the generality of infects, is provided with fix of nearly 
equal fize. The motions of this infedt are quick 
and irregular, and it frequently moves laterally, and 
even backwards with great facility. The plate re- 
prefents it both in its natural fize, and as it appears 
when magnified. 
