88 BULLETIX 108, UNITED STATES NATIONAL MUSEUM. 



Family TERMITIDAE. 



SuhisimiW RHINO TERMITINAE. 



Genus Prorhinotermes Silvestri. 



Species Prorhinotermes simplex Hagen. 

 Genus Reticulitermes Holmgren. 



Species Reticulitermes flavipes Kollar. 



virginicus Banks. 

 hageni Banks. 

 claripennis Banks. 

 tibialis Banks. 

 hesperus Banks. 

 lucifugus Rossi. 

 h'umilis Banks. 

 humilis var. hofcri Banks. 

 tumiceps Banks. 

 Subfamily TERMITINAE. 

 Genus Amitermes Silvestri. 



Species Amitermes tuhiformans Buckley. 

 arizonensis Banks. 

 wheeleri Desneux. 

 californicus Banks. 

 (?) per plexus Banks. 

 (?) confusus Banks. 

 Genus ANOPLOTERMES Fr. Miiller. 



Species Anoplotermes fumosus Hagen. 

 Genus NASUTITERMES Banks. 



Species Nasutitermes costaricensis Holmgren. 

 Genus CONS TRIG TO TERMES Holmgren. 



Species Constrictotermes tenuirostris Desneux. 

 cinereus Buckley. 



KEY TO NEARCTIC TERMITES BASED ON BIOLOGY AND PROMINENT 

 STRUCTURAL CHARACTERS. 



1. Wood-inhabiting species, not extending galleries from the earth into wood 2 



Wood-inhabiting species, extending galleries from the earth into wood 5 



Earth inhabiting species, not wood-boring — i. e., subterranean .6 



2. Termites usually working in moist wood 3 



3. Wood eaten longitudinally with the grain; excrement in impressed pellets; 



pigmented, worker-like form present Terviopsis. 



Wood eaten longitudinally with the grain; excrement not in pellets but fluid and 



seen as spots in the galleries Prorhinotermes simplex Hagen. 



Termites often working in dry wood, longitudinal oval chambers excavated in the 



wood ; excrement in impressed pellets; pigmented, work3r-like form present or 



absent 4 



4. Head of soldier concave in front, dark or black Cryptotermes. 



Head of soldier flattened and light colored Kalotermes and Neotermes 



castaneus Burmeister. 



Pigmented, worker-like form absent; hind femora of soldier short and stout 



Kalotermes. 



Pigmented, worker-like form present; hind femora of soldier long and slender 

 Neotermes. 



5. Prothorax subcordate, mandibles of soldier without marginal teeth... Reticulitermes. 



T> 4.-U JJ1 I. J j-T 1 f ij- (Amitermes wheeleri Banka (Texas): 



Prothorax saddle-shaped, mandibles of soldier , ,-. • t^ , ^ ,•/ 



.., • 1 ., 1. ^ A. californicus Banks (Calif. 



with a marginal tooth , . . 



* I and Ariz.). 



