JO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 5 1 



being strongest of all ; postvertical bristles small, of same size as the 

 black border row of occiput ; ocellar bristles strong, proclinate, diver- 

 gent ; postocellar bristles represented only by weak hairs ; two strong 

 proclinate orbital bristles ; lunula normal ; frontalia differentiated 

 only by being bare of hairs ; facial plate elongate, ovate, widened 

 below, about as high as parafacials, greatest width just above vibris- 

 sal angles and taking up three-fifths the facial width at that point, 

 quite flat, slightly advancing below, reaching quite to lower margin 

 of head; facial carina absent, antennal grooves hardly developed at 

 all; facialia divergent inferiorly to point just above vibrissas, then 

 feebly convergent ; facial bristles about two above vibrissas ; vibrissas 

 quite widely separated, inserted just a little above the oral margin; 

 vibrissal angles only moderately pronounced, rather rounded, sit- 

 uated moderately close to oral margin ; parafacials not quite twice as 

 wide at base of antennas as on lower orbits, flattened anteriorly, with 

 some fine black hairs next lower eye-margins: epistoma moderately 

 prominent, narrowed, showing a cut-off flattened edge below 

 vibrissas; mouthparts normal, proboscis when extended about as 

 long as head height, moderately fleshy, only once bent, labella mod- 

 erately developed; palpi entirely absent, showing no trace; oral 

 cavity moderately narrow and elongate ; peristomalia with a row of 

 seven or eight black bristles, which are continued around edges of 

 occiput ; longitudinal axis of head at oral margin practically same 

 as that at insertion of antennas, the facial profile being slightly con- 

 cave, and profile of parafacials straight but obliquely receding; an- 

 tenna? inserted about on a line drawn through middle of eyes and 

 about on upper three-fifths of head height, closely approximated ; 

 second antennal joint slightly elongate, fully twice as long as first 

 joint; arista bare, moderatel} long and slender, a little thickened on 

 basal one-third, basal joints short and indistinct; third antennal joint 

 about twice the length of second, moderately wide and of equal 

 width, rounded on both apical corners; eyes bare, not large, set 

 rather high, not extending as low as vibrissas, about twice as long 

 as wide; cheeks about as wide as one-half of eye height, clothed with 

 very fine light hairs, cheek grooves absent ; lower margin of head 

 nearly straight, but rounded behind; occiput slightly swollen on 

 1< i\\ er two-thirds. 



Sternopleural bristles 3, the middle one inserted lower than the 

 others and about equally distant from them ; hypopleural bristles 

 moderately strong, about 5 in number : 2 pteropleural bristles, the 

 posterior one very strong, curved, reclinate ; mesopleural bristles in 

 a posterior fringe of 7; propleural bristles 3, curved upward and 

 forward ; notopleural bristles 2, strong, curved, reclinate ; postsutural 



