36 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64, 



and projecting; the post-clypeus is light-brown, sHghtly bulging, is 

 bilobed, and the posterior margin is convex, it is over twice as broad 

 as long. The fontanelle is a small indistinct spot in a depression, 

 at the back of the eyes, it is nearer the posterior than in A.fumosus; 

 the epicranial suture is less distinct than in fumosus. The mandibles 

 are reddish to black at the tip but yellow-brown at the base, they 

 project slightly beyond the labrum. The ocelli are large and promi- 

 nent and are separated from the eyes by a distance equal to about 

 their long diameter. 



A. fumosus, female (type No. 218, M. C. Z.), of Vera Cruz, Mexico, 

 is a larger species than ater, is dark-brown, and also has longer 

 mandibles; the eyes are prominent and projecting; the post-clypeus 

 is lighter colored than the head, is prominent and projecting, being 

 twice as broad as long, and is bilobed — more so than in ater. The 

 mandibles project slightly beyond the labrum. The ocelli are 

 separated from the eyes by a distance equal to about their diameter. 

 The fontanelle is an indistinct spot at the base of the epicranial 

 suture, just back of the ocelli, at the middle of the eyes. 



A. tenebrosus KoUar, female (type No. 422, from Ypanema, Prov- 

 vince of St. Paulo, Brazil, is larger than any of the preceding American 

 species of Ano'plotermes. The head is dull brown-black in color, and 

 hairy; the eyes are large and prominent; the mandibles are long. 

 The ocelli are separated from the compound eyes by a distance nearly 

 equal to their long diameter. The fontanelle is a small yellow raised 

 point. The post-clypeus is dark-brown, raised up and one-third as 

 long as wide. The pronotum is lighter colored than the head. The 

 hmd tibiae are yellow-brown and elongate. 



The following measurements of A. tenebrosus are given for com- 

 parison with A. hondurensis Snyder, fumosus and ater. 



Measurements.— Length of entire winged adult, 14.5+ mm., 

 female; length of entire dealated adult, 5.5+ mm., female; length of 

 head, 1.35 mm.; length of pronotum, 0.65 mm.; length of left mandi- 

 ble, 0.65-0.70 mm.; length of hind tibia, 1.4 mm.; length of fore wing, 

 13 mm.; diameter of eye, 0.35 mm.; width of head, 1.3 mm.; width of 

 pronotum, 1.15 mm.; width of fore whig, 3.2 mm. 



A key to seven American species of Anoplotermes is herewith 

 appended. 



KEY TO SEVEN AMERICAN SPECIES OF ANOPLOTERMES FEITZ MOLLEE. 



1. Large, females ^^ 13-16 mm. in length, mandibles elongate (0.6-0.7 mm.), eyes and 



post-clypeus bulging 2. 



Small, females 7.50-12 mm. in length, mandibles short, eyes not so projecting, post- 

 clypeus over twice as broad as long 6. 



28 There is a marked difference in length of winged males and females in the genus Anoplotermes. 



