ART. 14 TERMITES FROM AMAZON BASIN SNYDER 71 



Measurements — Continued. 



Length of left inaudible, 2.G5-2.80 mm. 



Length of prouotum, 0.35-0.40 mm. 



Length of hind tibia, 1.55 mm. 



Width of head (at widest portion), 2.2-2.3 mm. 



Width of pronotum, 1.40 mm. 



O. hreviyilosus Snyder is near O. macro ce'phalus Holmgren but 

 is larger, has dense short hairs on the head, and the sides of the head 

 are convex; hrevipilosus has a shorter, narrower head than orthog- 

 nathus Silvestri, Avith narrower mandibles and tubercles, as well as 

 dense short hairs (lacking in orthognathus) ; hrevipilosus is larger 

 and has a broader, more hairy head than wheeleri Snyder; hrevi- 

 pilosus is larger than glohiceplialus Silvestri. 



Type locality. — Rosario, Bolivia. 



Described from a series of soldiers collected at the type locality, 

 w^ith workers in November, 1921, by W. M. Mann. 



Type, soldier.— C^t. No. 27674, uis.N.M. 



Another species of this genus collected is Orthognathotervies iiiac- 

 rocephalus Holmgren, found at Rosario, Bolivia ; soldier in termite 

 hills. 



Genus MICROCEROTERMES Silvestri 



The genus Eutermes was founded in 1849 by Heer for several fossil 

 winged termites ; one of these species, E. debilis, according to Hagen, 

 was from gum copal. Hagen examined the type and identified it 

 with a living species from Porto Rico. N. Banks (1920) examined 

 one of Hagen's specimens from Porto Rico and states that it is a 

 MicroceroterTfies allied to 31. strv/nckii Sorensen. Banks selected 

 E. dehilis Heer as type of Eutemies Heer. Eutermes Heer would 

 then replace Microcerotermes. 



However, I agree with C. Fuller (1924) that there is considerable 

 doubt as to the ability of Hagen to determine that dried specimens 

 are the same specifically as the fossil specimen. Species of Micro- 

 cerotermes are difficult enough to determine where fresh material 

 is available. Hence, I am referring species to the genus Microcero- 

 termes Silvestri, which formerly I placed in the genus Eutermes 

 Heer. Instead of using the name dehilis Heer for living species, I 

 am referring certain American specimens to arhoreus Emerson and 

 until the identity of dehilis Heer can be established, ignoring this 

 species and discarding Eutermes. 



The winged adults of species of Microcerotermes have the head 

 more or less elongate, with oval j)arallel sides ; the eyes are relatively 

 small and set parallel to the sides of the head; the ocelli are small 

 and are more or less distant from the eyes. The fontanelle is often 

 indistinct. The antenna3 have 14—15 segments and the third segment 

 is shorter than the second. 



