BY WALTER W FROGGATT. 517 



sloping cross nervures forming a network of smaller ones at the 

 tip. Fore wings differing from tlie hind pair in the venation in 

 many species. 



1. Genus Mastotermes, g.n. 



Head large, flattened on the summit; eyes large; ocelli small; 

 antenna3 30-jointed; prothorax large, with the sides turned up; 

 scapular shiekl with more than five branches. 



2. Genus Calotermes, Hagen. (Recent and fossil.) 



Head round; eyes large, projecting; ocelli small; antennfe 16-20- 

 jointed; prothorax large and broad. 



3. Genus Termopsis. (Recent and fossil.) 



Head large, broadest behind; eyes small, oval; ocelli wanting; 

 antenme long, 23-37-jointed; prothorax small, not as wide as the 

 head. 



4. Genus Parotermes. (Fossil.) 



Head rather large; eyes small; ocelli wanting; antennfe 20- 

 jointed; prothorax subquadrate, not broader than the head. 



5. Genus Hodotermes. (Recent and fossil.) 



Head large, circular; eyes small; not projecting, facets coarse; 

 ocelli wanting ; antennae 25-27-jointed ; prothorax small, broader 

 than long. 



6. Genus Porotermes. (Recent'.) 



Head small; eyes small, facets fine; ocelli wanting. Venation 

 of the wings very fine. 



7. Genus 8tolotermes. (Recent.) 



Head large, circular; eyes small, facets coarse; ocelli present; 

 anteniuB 12- 14- jointed; prothorax heart-shaped. 



8. Genus Mixotermes. (Fossil.) 



Founded by Sterzel upon a fossil wing from Lugau. Allied to 

 Calotermes (Berichte der Naturwissenschaftlen Gesellschaft zu 

 Chemnitz. 1878-80). 

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