REVISION OF NEARCTIC TERMITES. 71 



Worker.— Head dark brown; right jaw with three teeth; third joint 

 of antennae not longer than others near b}^ 



Two specimens from Texas without more definite indication of 

 locaUty; a dealated female and two nasuti. 



Genus CONSTRICTOTERMES Holmgren. 



Winged. — Head broader than long, ocelli present, fontanelle indis- 

 tinct, situate about as low as the ocelli; cl^^peus large, bilobed; gula 

 broader than long; palpi short; antennae with about 15 joints, third 

 joint plainly longer than either the second or fourth. Front wing 

 scales moderately large; wings very long, more or less twisted near 

 tips; margins ciliated, membrane sparsely hairy, median vein runs 

 much closer to the cubitus than to radial sector, usually with traces 

 of superior branches; cubitus and its branches strong and distinct, 

 ending near tip of wing; behind the radial sector near tip is some 

 evidence of reticulation. Legs reach tip of abdomen or beyond; 

 tibia with two apical spines; body and legs densely hairy. 



Soldier. — Similar to that of Nasutitermes, but the head is con- 

 stricted across the lower front and the legs are very slender and long. 



KEY TO SPECIES. 



Winged. 



1 . Ocelli fully short diameter from eyes cinereus. 



Ocelli closer to eyes tenuirostris. 



Soldier. 



1. Antennae 12-]ointe(i; head blacker; size smaller cinereus. 



Antennae 13-jointed ; head more reddish ; size larger tenuirostris. 



CONSTRICTOTERMES TENUIROSTRIS Dcsneux. 



Winged. — Pale browaiish yellow, front and segments of abdomen 

 rather more browii; densely clothed with golden or yellowish hair, 

 that on the front mostly brown and that on venter more gray or 

 white. Head broader than long, eyes large, nearly circular, not one- 

 third diameter from the lower margin, not much more than their long 

 diameter from the hind margin ; clypeus about two and a half times 

 as broad as long; as long as distance of ocelli to clypeus; ocelli large, 

 hardly one-half diameter from the eyes; fontanelle faint, about as 

 low as ocelli; antennae longer than head, 15-jointed, third joint 

 plainl^^ longer than fourth. Pronotum nearly twice as broad as long, 

 broadest in front; front margin nearly straight across, sides sloping 

 backward and rounded into the hind margin; fore wing scale not 

 nearly as long as the pronotum. Wings about three times as long as 

 the abdomen, often more or less twisted toward tip, dull grayish; 

 costal veins yellowish; other veins more brown, distinct; membrane 

 with minute, sparse, golden hair; cubitus with 10 or more branches; 

 median vein forked toward tip, often with traces of superior branches. 



Length to tip of wings, 20 mm. (Fig. 55.) 



