26o 



NORTH AMERICAN BLATTIDAE 



In the main portion of the present work 

 which we feel satisfied are estabUshecl ad 

 are ftdly treated. 



the following ten species, 

 ventives in this country, 



Blattella germanica 

 Supella SHpellectilium 

 Syniploce lita 

 Leurolestes pallidus 

 Blatta orientalis 

 Periplaneta australasiae 

 Periplaneta brunnea 

 Neoslylopyga rhombifolia 

 Blaberiis craniifer 

 Holocompsa 7iitidula 



Probable origin 



Europe 



Circumtropical 



American tropics 



Circumtropical 



Asia 



Asia 



American tropics 



Circumtropical 



North American tropics 



American tropics 



Distribution in 

 United States 



General 



Tropical Florida 

 Tropical Florida 

 Tropical Florida 

 General 



Southeastern United States 

 Southeastern United States 

 Southern Arizona 

 Tropical Florida 

 Tropical Florida 



It is of interest to note that these species are all domiciliary, or 

 at least they prefer to live under the changed conditions brought 

 about by the proximity of human habitations. 



Six of these species have become established only in the extremely 

 limited tropical areas on the southern border of the United States. 



The adventives of frequent occurrence, but not established in all, 

 or in all but the southernmost portions, of the United States, are 

 seven in number; of these Periplaneta australasiae is established in 

 the southeastern United States, Pycnoscelus surinamensis appears 

 to be a species native in the southern portions of that area, while 

 Pajichlora cubensis is native in the tropical Brownsville region 

 of Texas. 



I 



Nyctibora noctivaga 

 Nyctibora laevigata 

 Ep-ilampra maya 

 Periplaneta australasiae 



Pycnoscelus snrina mensis 

 Panchlora cubensis 

 Blaberiis discoidalis 



The remaining species are known to be rarely adventivc; — 

 of these there is a possibility that Ischnoptera rufa occidentalis has 

 become established on the Gulf Coast; while Parcoblatta lata, 

 Eurycotis floridana, Periplaneta americana and brunnea and Holo- 

 compsa nitidula, are rarely introduced in the portions of the 

 country where they are neither native or estal)lishe(l. 



It may be noted that the importation of tropical fruit is easily 

 the chief means of introduction of exotic Blattidae. 



