100 PROF. M. BEZZI. 



with the first three longitudinal veins closely approximated, the anterior cross-vein 

 long and obhque, the second basal cell dilated and the anal cell drawn out into a very- 

 long point. 



2 (7). Antennae as long as or shorter than the face, with the first joint not elongated 

 and shorter than the second ; face hollowed in the middle ; abdomen never stalked, 

 though sometimes a little constricted at base ; second basal cell short, usually not 

 more than twice as long as broad. 



3 (4). Thorax without anterior supra-alar or praescutellar bristles ; wings of the 

 male without the supernumerary lobe at end of anal vein . . . . Bacus, F. {s. sir.). 



4 (3). Thorax with well developed anterior supra-alar and praescutellar bristles ; 

 wings of male usually with supernumerary lobe at end of anal vein. 



5 (6). Wings banded . . . . . . . . . . Badrocera, Guer. 



6 (5). Wings not banded . . . . . . . . . . Chaetodacus, Bezzi. 



7 (2). Antennae much longer than the face, with the first joint usually elongated 

 and as long as the second ; face not hollowed, usually flat or even convex ; abdomen 

 distinctly stalked, club-shaped ; thorax without praescutellar bristles ; wings with 

 the second basal cell more elongate, many times longer than broad, and without 

 supernumerary lobe in the male. 



8 (11). The basal joints of antennae wholly separated. 



9 (10). Face flat ; thorax with the transverse suture broadly interrupted in the 

 middle and without unpaired acrostichal bristles ; front femora not spinose beneath ; 

 second portion of fourth longitudinal vein straight, the discoidal cell less narrowed at 

 base . . . . . . . , . . . . . . . . . . Mellesis, gen. nov. 



10 (9). Face distinctly convex ; thorax with the transverse suture not inter- 

 rupted, and often with a strong acrostichal bristle on the middle line ; front femora 

 with some spines beneath near the apex ; second portion of fourth vein deeply sinuose, 

 the discoidal cell nmch narrowed in its basal half . . . . Monacrostichus, Bezzi. 



11 (8). Basal joints of antennae united in the shape of a common petiole 



Callantra, Walker. 



12 (1). Arista short plumose ; scutellum longer than broad, triangular, flat above, 

 distinctly carinate at the sides ; thorax without praescutellar bristles ; abdomen 

 linear, narrower than the thorax ; middle femora elongated and thickened ; wings 

 with the first three veins not approximated, the anterior cross- vein short and placed 

 perpendicularly, the second basal cell not dilated and the anal cell with a short point. 



13 (14). Femora not spinose beneath ; thoracic suture interrupted in the middle ; 

 ovipositor compressed ; antennae short . . . . . . Neosophira, Hendel. 



14 (13). Femora spinose beneath ; thoracic suture complete. 



15 (16). Antennae shorter than the face, pendulous ; thorax with anterior supra- 

 alar bristle ; scutellum with four bristles ; ovipositor conical. . . Adrama, Walker. 



16 (15). Antennae very long, porrect, twice as long as the face ; no anterior 

 supra-alar bristles and only one pair of scutellar bristles ; ovipositor compressed 



Meracanthomyia, Hendel. 



