ME. a. D. HAVILAND OK TKEMITES. 373 



is a strong projecting ridge at the anterior margin of the antennal 

 fossa. Mandibles black, half as long as the head or longer, the 

 margin with short subtriangular teeth. Labrum small, sub- 

 quadrate. Grula long and united to the head for almost all its 

 length. 



The workers appear to be imperfectly differentiated from the 

 larvae. 



The genus is found in California and Central America. Hagen 

 described the males and females of Termopsis angu^ticollis from 

 California, and the soldiers of T. occidentis from the west coast 

 of Central America. In the Cambridge Museum are soldiers 

 from California in spirit; presumably they belong to T. angusti- 

 collis ; they differ from those of T. occidentis in having a longer 

 head and a much straighter anterior margin to the pronotum. 

 The relative size of the 2nd and 3rd segments of the antennae 

 seems inconstant. 



Gen. Calotermes, Hagen. 



Antennae of not more than 20 segments. Fenestra absent. 

 Y-suture obscure. Pronotum large and arched, the anterior 

 margin concave, nearly parallel to the posterior, the lateral 

 margins rounded. Femora short, the hind legs seldom reaching 

 to the apex of the abdomen. Cerci 2-segmented. Abdominal 

 papillae short, absent only in the female. 



Male with head ovate and convex in profile, with compound 

 eyes and ocelli. Antennae with the segments larger towards the 

 apex. Epistoma not prominent. Feet usually furnished with 

 plautulae. Anterior wing-stumps with convex border much 

 larger than the posterior which they overlap. Either the costal 

 area of the wing is veined, or the median runs in close contiguity 

 with the subcostal nerve. The submedian and its branches very 

 faint. 



The abdomen of the female is never much swollen. 



Soldier with strong head often subtruncate in front. Eyes 

 represented by a pale spot, rarely pigmented. Antennae short. 

 Mandibles black, stroug, cutting, generally toothed. 



Worker larval in appearance, cylindrical in shape. Head 

 pale. It is probable that all to whom accidents do not happen 

 eventually become winged fertile individuals. 



Nestless, living in the hollows which they make in eating 

 wood ; they pass solid oval grass, and do not build covered ways, 



LINIT. JOUEN. — ZOOLOar, VOL. XXVI. 28 



