480 bulletin: museum of comparative zoology. 



4. Mandibles long and distinct Armitermes. 



Mandibles very small, hardly noticeable 5 



5. Head more or less constricted below the middle Constrictotermes. 



Head not constricted Nasutitermes. 



6. Mandibles toothed : ; . . .7 



Mandibles not toothed .-. :9 



7. Mandibles toothed unlike Rhinotermes. 



Mandibles toothed alike 8 



8. Head more or less nasute Armitermes. 



Head not nasute Amitermes. 



9. Head broader behind than in front 10 



Head not broader behind 11 



10. Fontanelle large, close to clypeus. . Coptotermes. 



Fontanelle remote from clypeus Prorhinotermes. 



11. Mandibles down-curved, labrum bifid Mirotermes. 



Mandibles not down-curved ; labrum entire 12 



12. Pronotum broadest on front margin, subrectangular Leucotermes. 



Pronotum broadest near middle, diamond shaped Eutermes. 



Prorhinotermes simplex (Hagen). 



Described from Cuba (Vienna Mus.); one specimen in Hagen col- 

 lection, Cuba (Poey). In the U. S. N. M., there are specimens from 

 Santiago cle Las Vegas, Cuba (P. Cardin coll.), Kingston, Jamaica 

 (Ritchie coll.); also occurs in Florida. 



Rhinotermes marginalis (Linne). 



Soldier — large form. — Head bright yellowish, mandibles red-brown ; 

 abdomen and legs pale yellowish. Antennae longer than head, 17- 

 jointed, third joint longer than second. Head plainly longer than 

 broad behind, narrowed to the front, sides convex, labrum elongate, 

 rounded on tip, mandibles stout, bent before middle and on inner side 

 toward base with very large, stout tooth. Head with a few short, 

 erect bristles, gula narrowed in middle, a little wider behind, almost 

 twice as wide in front; pronotum narrower than head, corners bent 

 back a little, sides much sloping to the slightly emarginate hind border ; 

 legs espec ally tibia very slender; each segment with row of erect 

 bristles. 



Soldier — nasute form. — Head broader in front part, tapering 

 behind, with a long slender snout, slightly widened near tip; each side 

 on the head are four bristles; antennae longer than head, 16-jointed, 



