ART. 1^0. SOME NEW AMERICAN TERMITES — SNYDER. 25 



comparison with the many species in the genus Nasutitermes^ this 

 genus may be considered as composed of but few species. 



Except for the fact that the nasuti have few hairs on the head, 

 whereas there are quite a number of hairs or bristles on the heads 

 of the solcUers of species of TenuirostHtermes^ the two species of 

 C omt'Hctotermes to be described in this paper, namely, incisus and 

 hnciae^ would fall into Holmgren's subgenus Tenuirostritermes. 

 This subgenus has only one type of nasutus and it has shorter legs 

 than in the subgenus VeJocitermes Holmgren. Furthermore, the 

 species do not construct semispherical, carton, "niggerhead" tree 

 nests. In Tenuirostritermes the post-clypeus of the worker is about 

 as long as half its breadth (twice as broad as long). 



The subgenus V elocitej^mes includes species which have two types 

 of nasuti or soldiers, with few hairs on the head and with long legs; 

 the mandibles are somewhat longer than in soldiers of species of 

 Tenuirostritei^ncs. Species of VeJocitermes do not construct carton 

 tree nests. 



In the subgenus Consto'ictotermes Holmgren (restricted sense), the 

 species have only one type of nasutus, with peculiarly constricted 

 head and with many hairs on the head. Species are included in this 

 genus Mhich do construct carton tree nests. 



C. incisus and hriciae have only one t3^pe of nasutus, so far as known 

 (only one has been collected). There are but fcAV hairs on the head ; 

 the mandibles are extremely short (much shorter than in species of 

 Tenuirostritermes) ; the legs of the soldier are as long as in species 

 of TenuirostHtei-mes. In the worker the post-clypeus is about twice 

 as broad as long. Neither of these new species were found in carton 

 tree nests. Hence, I place them in the subgenus Tenuirostritermes. 



CONSTRICTOTERMES (TENUIROSTRITERMES) INCISUS, new species. 



Soldier (pi. 3, figs. 10 and 11). — Head dark castaneous-brown, 

 almost black, with a lighter brown color on base of head around the 

 base of the antennae and at the tip of nasus. Ventral portion of head 

 also lighter colored. Head deeply constricted (angles acute), with 

 I asal portion approximately one and one-half times as long as apical 

 portion (without the nasus) — basal portion longer than the nasus, 

 also broader than the apical portion; head rounded posteriorly, basal 

 portion of head doreally with one long bristle on each side Avhere 

 head is widest. Xasus same color as head, long and slender; pointed 

 at apex where lighter colored and with short pubescence. The head 

 forms an angle with prothorax. 



Antennae yellov.'ish-brown, 13 seginents, with long pubescence ; first 

 segment elongate, stout and cylindrical ; second short, approximately 

 half the length of first, clavate: third long and tapering, clavate, 

 slender at base, nearly as long as first; fourth approximately equal 



