ZOOLOGY. ARTHROPODA. 153 



as Hydrobatidac, Notoncctidae and Corisidae, in the aquatic 

 Hemiptera; and of the Ephemeridae among the Pseudoneuroptera. 

 White ants and Psocidae likewise remain unrecorded ; and the 

 Diptera, a numerous host, seem to have been almost totally 

 ignored. That part of the assemblage to which attention has 

 been hitherto directed is almost entirely Nearctic in character, 

 and corresponds with the fauna which exists in the eastern 

 part of the United States from Cape Cod to northern Florida. 

 A very few species, such as Blabem Americana and Labidura 

 riparia, occur in the Bermudas, but they are wanderers which 

 frequent vessels, and are liable to be transported to places 

 where they make no permanent stay. There are, however, 

 multitudes of Neotropical forms, residents of the West Indies 

 and southern Florida, which we look for in connection with 

 the palmettos and tropical fruit trees and shrubs that are now 

 permanently settled in those islands; but these forms are still 

 lacking in our collections. Can it be that these insect absentees 

 are only such as live in the upper parts of the high trees, and 

 that do not descend during the daylight so as to be noticed by 

 collectors? Mr. J. M. Jones, in his " Naturalist in Bermuda," 

 has given some account of a few insects belonging to this lo- 

 cality, but his attention seems to have been directed almost 

 exclusively to the showy or more conspicuous kinds. It is 

 therefore with earnest solicitude that we await the time when 

 some acute collector will undertake to solve the problem of 

 insect settlement which lies deeply buried in the history of 

 this little group of islands. 



HEMIPTERA. 



CYDNID^J. 



Pangaeus bilineatus, Say. 



A fore-leg only of this curious black burrowing Cydnid was 

 present in the bottle of specimens. It agrees with the same or- 

 gan of some individuals in my own collection ; and I had 

 previously examined a perfect specimen of this species which 

 was brought from Bermuda by Mr. J. M. Jones. 



