DERMAPTERA AND ORTHOPTERA 295 



for land transfer across Mexico for shipment to Spain. In coming 

 years Neostylopyga probably will gradually become established in 

 parts of the southwestern United States, as well as in much of the 

 warmer parts of Mexico. 



Seven of the blattid genera that are endemic in western North 

 America can definitely be called Neotropical in origin. The majority 

 belong to the subfamily Pseudomopinae, which is a cosmopolitan 

 assemblage that is highly developed in the Neotropical Region. 

 Of these the genus Euthlastoblatta is known in our territory only 

 from extreme southern Texas, although other members of the genus 

 occur southward to Panama. Latiblattella, another basically Neo- 

 tropical genus, has a single species in western North America, 

 restricted to certain mountain areas of southern Arizona. A number 

 of other species of Latiblattella occur in Mexico and Central America, 

 and one is endemic in peninsular Florida. The genus Ischnoptera is 

 another very diverse and basically Neotropical genus, of which 

 two species reach North America: the endemic /. deropeltiformis, 

 which is widely distributed in eastern North America and reaches 

 westward as far as central Texas, and /. rufa occidentalism a race of a 

 widely spread Neotropical species, which has a broad range in 

 Mexico and Central America, entering our territory only on the 

 Gulf Coast of Texas. 



The flower-haunting harlequin-patterned cockroach Pseiidomops 

 is another very widely spread Neotropical genus, of which a single 

 species enters our territory, and is found in Texas north to the 

 central part of the state. The remaining genus of the Pseudomopinae 

 in our territory is Parcoblatta, which, unlike all the other genera of 

 the subfamily, is strictly limited to North America. Of the twelve 

 species of this genus four eastern ones narrowly impinge on our 

 territory in eastern Texas; bolliana is found westward to central 

 and southern Texas, and north to Nebraska; desertae is distributed 

 from eastern New Mexico to central Texas and Oklahoma ; /zz/^e^- 

 cens ranges westward to central and southern Texas, north to the 

 Red River, but not west of Texas; pensylvanica extends west to 

 central and southern Texas, north to Nebraska; americana is a 

 Pacific species distributed from Oregon to western Arizona and 

 Nevada; and notha is an endemic species of certain mountain 

 areas of central and southern Arizona. Apparently Parcoblatta has 

 developed from a relatively early Neotropical ancestor, and the 



