114 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



3. UPPER AUSTRAL Humid lowlands and prairies east of the 

 100th meridian in North America, and arid plains and mesas 

 west of the same meridian terminating in the plateau of south- 

 central Mexico. 



4. MIDDLE AUSTRAL Same classification as preceding and just 

 south of it or below. 



5. LOWER AUSTRAL Classified same and south of preceding 

 or below it in altitude. 



6. SEMITROPICAL Practically all humid lowlands in the east 

 and arid lowlands in the west, but rising on the humid eastern 

 mountain slopes and arid western mountain slopes within the 

 tropics of North America. Includes all of the Florida main- 

 land and what has been known as the Gulf strip of the lower 

 austral. Preeminently a citrus-fruit region, severe frosts being 

 rare but not unknown. 



7. TROPICAL Humid to arid lowlands and hills where frost 

 is absolutely unknown. Distinctively a cocoanut and royal 

 palm region. 



The above definitions are given because they involve some 

 modification of the usually accepted classification. 



The main mountain regions of North America are classified 

 in 4 groups: I Appalachian (the whole eastern system); II- 

 Rocky Mts. (West Texas to Athabasca and Alaska) ; III Sierra 

 Nevada (South California to British Columbia including Coast 

 ranges); IV Sierra Madre (Chihuahua to Central America). 



A REMARKABLE NEW GENUS OF CEPHIDJE. 



BY S. A. ROHWER, 

 Branch of Forest Insects, Bureau of Entomology. 



The new genus described below is very remarkable because 

 it possesses family characters of two families Cephidse and 

 XiphydriidaB. 



The following important group characters of this genus are 

 listed under the family with which they would ally it. 



CEPHID/E. XIPHYDRIID/E. 



Adult. Adult. 



Thorax Palpi 



Basal part of abdomen Antennae 



Long malar space and ven- 

 tral elongation of cheek 

 Wings 



Lengthened 8th tergite 

 Ovipositor 

 Larva (?) 



