194 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Heteroptera, but he reviewed briefly the salient characteristics 

 of the more important families in other orders as he observed 

 them. 



It appears that owing to its extremely pronounced dry sea- 

 son, which makes its influence felt throughout the whole width 

 of the isthmus, as well as the deforestation of that region which 

 has been going on since the building of the Panama Railroad, 

 and finally on account of the operations of the Sanitary De- 

 partment, the fauna of the Canal Zone proper is certainly less 

 rich in species than the region to the east and west. At Porto 

 Bello, where there is no dry season and where the rainfall is 

 much heavier than on the Canal Zone, the insect fauna is cor- 

 respondingly much richer in species and specimens. 



Within the Canal Zone there are, of course, differences in 

 the fauna at the various places; thus in the low, swampy 

 woods which extend from Colon to Bohio, a large number of 

 insects can be found which do not occur in other parts of the 

 Zone; the sand and gravel bars of the middle Chagres River 

 furnish many peculiar species, and so do the higher hills ad- 

 jacent to the famous cut through the divide, known as the 

 Culebra Cut. As a whole, the fauna of the Canal Zone pre- 

 sents a uniform character, excepting a narrow strip on the 

 Pacific shore, where both flora and fauna differ radically from 

 the rest of the Zone. 



Since by far the greatest bulk of the Coleoptera and Hemip- 

 tera are arboreal species and show an immensely greater agility 

 than our more northern insects, our accustomed implements 

 for collecting proved very inadequate. The large collection 

 made by him is not yet mounted and no especial notes could 

 be given at present. 



Finally, he remarked that in his opinion the future artificial 

 lake, known as Gatun L,ake, will not make a material change 

 in the composition of the insect fauna of the region. 



