1897.] NATURAL SCIENCES OF PHILADELPHIA. 263 



clypeus greatly depressed beneath level of face, fore margin rounded ; 

 bases of antennas contiguous, situated below level of face; the latter 

 when viewed from side more prominently convex than usual ; front 

 not impressed ; eyes a little separated from base of mandibles, 

 diverging slightly above, the space between them at that point 

 nearly equal to the length of antennal joints 3-5 united ; space be- 

 tween hind ocelli distinctly greater than that between them and eyes ; 

 hind ocelli situated in shallow depressions; antennae short, first 

 joint of flagellum, if anything, slightly shorter than second ; prono- 

 tum augulate behind; middle segment subemarginate behind, the later- 

 al angles rounded, legs rather strongly spinose, claws cleft ; fore femo- 

 ra at least three times as long as their greatest width ; abdomen com- 

 pressed except at base ; wings dark fuscous, with bluish pile, some- 

 what paler medially, second recurrent nervure received by the cubital 

 vein beyond apex of second submarginal cell. Length 10-15 mm. 

 Chapada (April, September). Two specimens. Resembles canes- 

 cens Smith, but is larger, less pilose, has shorter antenna?, etc. The 

 bunch of silvery pubescence on each postero-lateral angle of middle 

 segment is apparently a good superficial character. 



Planiceps canescens Sm. [=Aporus i-anescens Sm.). 



Santarem. Four specimens. Smith's description is too meagre 

 to indicate whether canescens is an Aporus or Planiceps. The spec- 

 imens in this collection agree with it, however, and they are surely 

 Planiceps. 



The Brazilian species of Planiceps, excluding P. varipennis and 

 Lacordairii Guerin, which I have not seen, may be tabulated as 

 follows : 



1. Wings fasciate or maculate ; ajbdomen spotted, 2. 



Wings fuscous throughout ; abdomen unicolored, 5. 



2. Fore wings black, with the median cell (except base and apex), 



and a fascia beyond, white, apex subhyaline ; hind wings 



stained with fuscous ; dorsulum posteriorly and scutellum with 



pale, dense, pile ; abdomen seven spotted, .... perpictus. 



Fore wings fuscous, bifasciate with subhyaline or yellow, . . 3. 



3. Pronotum laterally not ridged ; length 12 mm. or over, . . 4. 

 Pronotum sharply carinated or ridged laterally ; length 6 mm. ; 



dorsulum posteriorly with yellow pubescence ; second and 

 third dorsal segments with a pale spot on each side, the sixth 

 entirely fulvous, jugosus. 



