they are particularly infefted with an infe6l, in form like the 
common fheep tick, which we believe often proves fatal to 
them ; an occurrence of this kind cam.e under the immediate 
notice of a gentleman refiding in Parliament-Street, who 
jkindly communicated the circumftance to us with the bird ; 
a fwallow was obferved to fall down in the ftreet without 
any vifible occafion, which he took up, and on clofe exami- 
nation found a number of the above-named infeds attached to 
its throat and body, fucking in the manner of leaches ; the 
bird was quite dead, it was very fat, and there was no other 
feeming caufe for its death than thcfe infedts. 
This fpecies cafts the undigeftible parts of its food in the 
fame manner as the hawk tribe, we are not able to fay 
whether this is common to the genus, but conceive it moft 
probably is. 
We have had a fand martin fent to us which was fhot on 
the twentieth of the prefent month (March) and we faw two 
of the fpecies now before us on the twenty-third, which is 
earlier than they ufually appear with us. 
