REVISION OF NEARCTIC TERMITES. 55 



Genus AMITERMES Silvestri. 



Winged.— Clj]ieus bilobed, about two and a half times as broad 

 as long, about as long as distance from ocelli to clypeus; fontanelle 

 minute, elongate, hyaline, or nearly circular; antennae with joints 

 2, 3, and 4 short and small. Legs reach beyond tip of body, front 

 tibia with two small mner spines at tip and one outer one. Front 

 wing scales very short; wings very long and narrow, margins ciliate, 

 the membrane not distinctly hairy; median runs near to cubitus and 

 usually forks near middle. 



Soldier.— Head but little longer than broad, convex above; clypeus 

 V)ilobed; labrum nearly pointed; mandibles curved, with one tooth; 

 palpi rather long; gula slightly narrowed in front, wide m middle; 

 pronotum diamond-shaped, sides bend downward, legs moderately 

 slender. 



KEY TO SPECIES. 



Soldiers. 



1. Mandibles as long as the head 2. 



Mandibles very much shorter than the head 3. 



2. A distinct tooth much before the middle of each mandible arizonensis . 



A little hooklike tooth near middle of each mandibJe tubiformans. 



3. Mandibles thick and stout, with blunt tooth; larger species calif omicus . 



Mandibles slender, with sharp tooth ; smaller species rvheekri. 



Winged. 



1. Length not over 10 mm 2. 



Length fully 12 mm; fontanelle nearly circiilar 4. 



2. Fontanelle very slender and elongate : 3. 



Fontanelle large and broad, but longer than broad, larger than an ocellus 



calif omicus . 



3. Head black '. tubifonnans . 



Head brown arizonensis. 



4. Clypeus pale; head pale brown confusus. 



Clypeus dark; head darker brown perplexus. 



Of the last two species we have seen only adults, and the shape of 

 the fontanelle might indicate that they do not belong to Amitermes 

 but to Capritermes. 



AMITERMES TUBIFORMANS Buckley. 



Winged. — Browai, the head dark brown, clypeus paler, antennae 

 with brown, legs dull yellowish to brown. Head short, broadest at 

 eyes, narrowed in front and behind; eyes round, hardly half their 

 diameter from lower margm of head, ocelli about their short diameter 

 from eyes; fontanelle distmct, elongate, on a line connecting tops of 

 the eyes; antennae longer than head, 14-jointed. Pronotum nearly 

 twice as broad as long, broadest near the front margm which is nearly 

 straight, the sides sloping backward and rounded mto the hind mar- 

 gin; wing-scales hardly as long as pronotum. Wings nearly twice 

 as long as body, brownish, costal veins darker, cubitus with about 



