364 GERALD F. HILL. 



Drepanotermes silvestrii, sp. n. 



Imago. — Head very dark brown, nearly black ; postclypeus, thoracic, and 

 abdominal tergites Brussels brown ; lower surface chiefly antimony yellow ; mid 

 and hind tibiae, pleurae, and lateral blotches on abdominal sternites dark ; wings 

 dark brown. 



Fig. 1. Drepanotermes 



silvestrii, sp. n., head and 



prothorax of imago. 



Head (fig. 1) rounded behind, flat on the summit, glabrous, moderately setose, 

 Labrum moderately large, swollen on the sides, rounded in front. Anteclypeus, 

 membranous, pointed in front. Postclypeus rather larger than in D. nihriccps, 

 Frogg., twice as wide as long. Eyes small, nearly circular (0-329 X 0-376), slightly 

 projecting. Ocelli large, oval, oblique, well separated from the eyes, anterior margin 

 in line with anterior margin of eyes. A small deep impression on either side between 

 the ocelli and clypeus. Fontanelle large, broadly oval, verj' distinctly visible, with 

 small indistinct forward extension. Antennae 18-jointed, not variable in size and 

 shape of segments ; 1st joint long, stout, cylindrical, more than twice as long as 

 wide ; 2nd three-fifths the length and two-thirds the width of 1st ; 3rd and 4th 

 very short, shortest of all, narrower than 2nd, coalesced ; 5th short but distinctly 

 longer and wider than 3rd and 4th ; 6th longer and wider than 5th ; 7th, 8th and 

 9th equal ; 10th longer than 9th ; 11th to 15th about equal ; 16th and 17th a Httle 

 longer and narrower, 17th narrower than 11th to 16th ; 18th as wide as, but longer 

 than 17th, as long as 1st, pointed. 



Fig. 2. Drepanotermes silvestrii, sp. n., hind 

 tarsus of imago. 



Prothorax (fig. 1) nearly flat, slightly sinuate and bent up in front, antero-lateral 

 angles rounded, sides rounded to the rounded posterior margin, moderately setose. 

 Meso- and metathorax uniform brown, wing-stumps similar to those of D. ntbriceps 

 but smaller. Legs (fig. 2) wexy long and slender, armature alike in each excepting 

 that the first tibiae bear the usual additional spur ; fourth tarsal of each leg very long 

 and slender ; femora all about equally stout. 



