262 PROCEEDINGS OP THE ACADEMY OF [1897. 



silvery pile, the apex of dorsulum with pile similar to that of front; 

 clypeus very short, broadly subtruncate, sparsely punctured ; front 

 and face depressed along eyes, particularly the face ; eyes diverging 

 above, reaching base of mandibles, separated above by a distance 

 about equal to length of antennal joints 2-5 united ; fore ocellus in 

 distinct fovea, the space between hind pair greater than that between 

 them and eyes; this intervening space depressed; antenna? stout 

 hardly as long as length of pronotum and dorsulum, first joint of 

 flagellum nearly as long as the two following united; posterior mar- 

 gin of pronotum slightly angular; middle segment subtruncate, the 

 posterior surface a little depressed ; legs robust, rather strongly 

 spinose, fore femora less than three times longer than broad, claws 

 bifid ; abdomen smooth, compressed beyond base ; fore wings fuscous, 

 bifasciate with yellowish, their tips pale, hind wings except apex 

 subhyaline with a milky-blue reflection, second submarginal receiv- 

 ing both recurrent veins. Length 16 mm. 



Santarem. One specimen. Seems to be near Lacordairii Guerin, 

 but last segment is yellow above, not beneath, and the wings are 

 apparently different. 



Planiceps venustus Lep. 



Santarem. One example. 



Planiceps (!) jugosus n. op. 



9 . — Black ; more or less clothed with silvery pile, especially on 

 sides of thorax ; antennae beneath fulvous ; second and third dorsal 

 segments with a lateral pale yellow spot, the sixth segment orange ; 

 fore femora much less swollen than usual; first and second joints of 

 flagellum about equal in length ; pronotum margined on each side 

 by a strongly developed ridge or fold, posterior margin sharply 

 angulate ; dorsulum posteriorly clothed with yellow pubescence ; fore 

 wings fuscous, crossed by a hyaline band at apex of first submarginal 

 cell, the median cell also hyaline, tips subfuscous, hind wings sub- 

 hyaline, iridescent, second submarginal receiving both recurrent 

 veins. Length 6 mm. 



Chapada (April). One specimen. This is very distinct in its 

 small size and carinate pronotum. 



Planiceps diverticulus n. sp. 



9 . — Black ; with scant purplish pile ; tips of mandibles red ; tarsi 

 testaceous apically ; thorax beneath sparsely, coxae in part and pos- 

 tero-lateral angles of middle segment, with silvery pile or pubescence ; 



