EEVISION OF NEAECTIC TERMITES. 39 



middle, concave on front margin, sides rounded. Wings more than 

 twice the length of abdomen, but not twice the length of entire body; 

 no distinct median vein; the cubitus bends upward and meets the 

 radial sector a little before tip of wing. 



Length to tip of wings, 11 mm. (PI. 1, fig. 1.) 



From Cotulla, Texas, April 17 (Pratt). Only one specimen, but 

 distinct by the remarkable venation which is similar to an Australian 

 species of the genus. 



Tyfe, winged adult.— Cat. No. 21860, U.S.N.M. 



Subfamily Rhinotermitinae. 



KEY TO GENERA. 



Winged. 



1. Median vein absent, fontanelle nearer to clypeus ttan to vertex. . . ProrhinoUrmes . 

 Median vein distinct, fontanelle as near to vertex as to clypeus Reticulitermes . 



Soldiers. 



1. Tiabrum pointed at tip; head barely if any broader behind, last tarsal joint moder- 

 ately long: fontanelle not especially distinct Reticulitermes . 



Labrum rounded at tip; head plainly broader behind than in front; last tarsal 

 joint very long; fontanelle very distinct Prorhinotermes. 



Genus PRORfflNOTERMES Silvestri. 



Winged. — In general similar to Reticulitermes: the clypeus and 

 antennae about the same ; the fontanelle is very distinct and situated 

 a little nearer to clypeus than to vertex; the wings are similar, but 

 there is no distinct median vein; in the apical part there is an irreg- 

 ular series of connecting veinlets across the cross-veinlets from cu- 

 bitus to radial sector. The last tarsal joint is rather longer than usual. 

 The gula is broader than long and rounded at the base. Legs 

 hardly reach beyond tip of body; the tibia with two spines at tip. 



Soldier. — Head rather broader behind than in front; fontanelle very 

 distinct ; mandibles slender, curved, untoothed ; labrimi not narrowed 

 toward tip, which is rounded ; pronotum broadest in front, rounded 

 behind ; legs ver}^ slender. This species has been placed by Holmgren 

 in Arrhinotermes, but the type of ArrJiinotermes, as admitted by 

 Holmgren, does not belong to this genus, but to Coptotermes. Pro- 

 rhinotermes, although based on an Australian insect, appears to cover 

 our species. 



PRORHINOTERMES SIMPLEX Hagen. 



Winged. — Head pale reddish brown, yellowish on lower part ; tho- 

 rax and abdomen 3^ellowish brown; legs and antennae pale. Head 

 no longer than broad, but little broader behind than in front; eyes 

 circular, less than diameter from the lower margin of head, a little 

 over twice their diameter from the hind margin of head; fontanelle 



