42 



SMITHSONIAN ]M ISCELLANEOUS COLLECTIONS 



VOL. J2 



outside keys. I'his was rendered comparatively easy, since they were 

 fortunate enouj^h to find the inos(|uito ]:)ests practically absent. 

 Between May 3 and 6 they examined every sandspit on the mainland 

 along Key Biscayne Bay. Card Sound. Little Card Sound and Barnes 

 Sound. They then turned the southern ])ortion of Barnes Sound 

 and came up along the outer keys, examining them in turn. They 

 crossed Key Largo at several places and walked long stretches in its 

 interior. 



No Cerions were found on the mainland between Miami and the 

 ])oint where the railroad enters the keys, but two colonies were dis- 



FiG. 42. — Nest of swallow-tailed kite {Elanoidcs jovhcatus foriicatus) 

 between Flamingo and Coot Bay, Cape Sable, Florida. 



covered on keys a very short distance from the mainland in Barnes 

 Sound. One of these is situated on a sandspit covered with grass and 

 shrubbery on Middle Key, while the other one was found in a clear- 

 ing on the southeastern point of Main Key. No Cerion colonies 

 were discovered on the keys forming the eastern i)erimeter of Barnes 

 Sound, Little Card Sound, Card Sound and Key IJiscayne Sound, 

 excepting Porgee Key, where a goodly quantity were obtained, some 

 of which have been dissected and puljlished u]:)on in the bulletin on 

 "Experiments in the IJreeding of Cerions"' recently issued b\- the 

 Carnegie Institution. In addition to Cerions, collections of all the 

 other species of land mollusks available were made wherever found at 



