AKT. 14 TERMITES FROM AMAZON BASIN SNYDER 7 



TyiJe locality. — Near mouth of Mapiri, Bolivia. 



Described from a series of soldiers collected with nymphs at the 

 type locality in September, 1921, by W. M. Mann; other specimens 

 of soldiers from Hiiachi, August; Rio Colorado, September, 1921; 

 Eosario, November, 1921; and Espia, Bolivia, Mann collector. 



Type, soldier.— Cat. No. 27645, U.S.N.M. 



Family RHINOTERMITIDAE 

 Genus RHINOTERMES Hagen 



Only seven species of this genus have been previously described 

 from America. The winged adult has the clypeus projected into a 

 small noselike jjrocess or horn. There are two types of soldiers, 

 the major strongly mandibulate and the minor with the elongate 

 slender labrum forked at the apex, and fairly long, slender, pointed 

 or vestigial mandibles. 



In several new American species the major soldiers hav^e the 

 labrum remarkably elongate (pi. 1). The dimorphism of the sol- 

 dier caste is very striking, there being marked structural differences 

 between the major and minor soldiers. 



RHINOTERMES LATILABRUM,'' new species 



Boldier., major (pi. 1, fig. 6). — Head straw-yellow, rim of antenna! 

 socket darker, labrum yellow-brown, lighter toward apex, base of 

 mandibles yellow, but castaneous brown toward the apex and mar- 

 ginal teeth; head narrows anteriorly, rounded posteriorly, scattered 

 long hairs on head. Labrum elongate as in minor soldier, broadest 

 at base, with long hairs at apex. JMandibles elongate, slender, 

 sharply pointed and incurved at the a^Dex ; prominent marginal teeth 

 — as in figure ; tips of two teeth broken on right mandible. 



Antenna light yellow, IG segments, with long hairs; third segment 

 slender, subclavate, about same length as second but longer than 

 fourth segment; segments beadlike, become longer and broader to- 

 ward apex; last segment narrower and subelliptical. 



Pronotum straw-yellow, margins darker, jaddle-shaped, posterior 

 margin markedly emarginate, anterior margin sharply raised up, 

 rounded and narrowed; few scattered long hairs on posterior margin, 

 few long hairs and more numerous short hairs on anterior margin. 



Legs white, with tinge of yellow, fairly elongate, slender, piibes- 

 eent (hairs long). 



2 In a iiaper entitled "An Extraordinary New Rhinotermes from Panama," in Proc. Biol. 

 Soc. of Washington, vol. 37, pp. 8^-0, February 21, 1924, the writer referred to R. latila- 

 iriim Snyder as R. intermcdius Snyder MS. Since it h.-is been found that the name 

 intermedins is preoccupied, this was later changed to latUabrum — emphasizing the rela- 

 tively broad labrum of the major soldier caste. 



