HENRY J. FRANKLIN. 199 



10. The Auricomus group is mostly confined to the Boreal Region 

 and the Transition and Upper Austral Life Zones of North America, 

 running over into the Lower Austral but very little at most. 



11. The Fratenus group, in North America, ranges through the 

 Upper Austral and Transition Zones and into the Boreal Region. In 

 South America, it seems to be confined mostly to the Highland of the 

 Andes, its most southern reported habitat being northern Argentina. 

 It reaches its maximum in number of species in Peru and Ecuador, 

 though this maximum does not appear to be much reduced even so far 

 north as Mexico. 



12. In the New World, the Borealis group is confined to the Boreal 

 Region and the Transition Zone of North America. 



13. The Dumoucheli group is the most wide spread of all the New 

 World groups. It ranges throughout South and Central America, 

 Mexico, the United States, southern Canada and into Alaska. It 

 appears to reach its maximum in number of species in Mexico, but 

 this maximum is not much reduced even so far south as Brazil and 

 Ecuador. 



14. In the New World, the Kirbyellus group is strictly confined to the 

 Boreal Region, and seems to reach its maximum abundance in northern 

 Canada and in Greenland. 



15. In the New World, the Terrestris group is confined to the Boreal 

 Region and the Transition and Upper Austral Zones of North America. 



16. The Pratorum group is not present in Greenland. It is probably 

 present in all the political divisions of North and Central America, 

 though it has not yet been reported from either Oklahoma or Texas 

 (the fact that both hnpatiens and bhnaculatus have been reported from 

 Louisiana and Arkansas and that impatiens is present in Florida are 

 pretty certain indications that at least itnpatiefis and bimaculatus are 

 present in these two states). It also ranges through Colombia into 

 Venezuela and Ecuador in South America, being confined to the 

 mountain ranges in this portion of its habitat. It has its maximum 

 number of species in Alaska, western Canada and the western United 

 States, the variation in this number not being very great throughout 

 this wide range. 



17. The apparent absence of Psithyrus from South America is re- 

 markable. 



18. The Ashtoni and Fernaldcs groups in the New World are con- 

 fined to the Boreal Region and the Transition Zone. 



19. The Laboriosus group is present in a portion of the Boreal Region 

 and it ranges through the Transition and Upper Austral Zones and a 

 considerable part of the Lower Austral Zone. It ranges in scanty 

 numbers through Mexico and probably through Central America also, 

 being confined to the mountains in these regions. The record of 

 P. brasiliensis from Brazil is evidently erroneous. See the discussion 



TRANS. AM. KNT. SOC, XXXVIII. 



