156 THE BERMUDA ISLANDS. 



therefore expect to find such forms as Anax Junius, T)*amca Caro- 

 lina, Pantala flavescens, and perhaps Libellula scmifasciata and 

 Lepthemis hsematogastra, hawking over one or another part of 

 the low districts of Bermuda, and especially in places where 

 mosquitoes develop in greatest numbers. 



DERMAPTERA. 



Labidura riparia, Pallas. 



Forfimla gigantea, Fab. 



A few specimens of the male of this large and showy ear- 

 wig are present in the collection. Two of these measure 10 

 lines to the end of the abdomen, while the chelee have a 

 length 'of fully three lines. This species was originally de- 

 rived from the region of the Mediterranean, but it has recently 

 been widely distributed by commerce to parts along the eastern 

 border of the United States, and no doubt the same agency 

 has transferred it to the soil of the Bermudas. 



ORTHOPTERA. 

 BLATTID.ffil. 



Blabera Americana, Linn. 



Several specimens both of the adult and larval form, are in 

 the collection. They differ in no respect from the usual types 

 which are now distributed over most of the world by the 

 activities of commerce. This species is common in warehouses 

 near the docks in some of our cities adjacent to the Atlantic 

 coast, but it seems not to have formed a permanent lodgment 

 in any of them. The supply is kept up by the frequent 

 arrivals of vessels from tropical countries, in which they rest 

 concealed between the packages of merchandise. 



Panchlora Maderae, Fab. 



This is another common cockroach widely distributed by 

 the agency of commerce. It is alluded to in the work of J. M. 

 Jones, under the name 'Blatta Maderensia, as being seen in 

 " cellars and ' other dark places, on these islands, where it 

 is commonly known by the name of ' Knocker/ from a habit it 



