LIST OF DIPTERA. 615 



Radial vein almost straight, joining the subcostal at rather far 

 from the tip of the latter. Cubital forked at very much beyond half 

 its length ; forks very slightly undulating, slightly approaching each 

 other near each end ; fore fork forming at its base a slightly obtuse 

 angle, which emits a branch; the latter is much longer than the 

 basal side of the angle. First externo-medial vein slightly curved ; 

 second straight ; third curved, forming a hardly obtuse angle with 

 the praebrachial, joining the fourth at rather far from the border. 

 Subanal joining the anal near the border. 



Erax niger, Wied. ; E. femoratus, Macq. ; E. Dascyllus, Walk. 



Group 2. 



Mas. Corpus elongatum, parce hirtum. Caput subtus den- 

 sissime pilosiun. Facies valde convexa. Mystax sat dense setosus. 

 Proboscis linearis. Antennarum articulus lus 2o plus duplo longior ; 

 3us longiconicus, lo brevior ; arista 3o triplo longior. Thoracis 

 latera et scutellum subsetosa. Abdomen alas longe superans. 

 Sexualia magna. Pedes validi, hirti, spinosi. 



Radial vein nearly straight, joining the subcostal far from the 

 tip of the latter. Cubital forked at rather before two-thirds of its 

 length ; fore fork forming a nearly right angle whose basal side is a 

 little longer than the branch which it emits; hind fork slightly un- 

 dulating. First and second externo-medial veins nearly straight ; 

 third almost straight, forming a hardly obtuse angle with the pras- 

 brachial, joining the fourth at some distance from the border. 

 Subanal joining the anal near the border. 



Erax Antiphon, Walk. 



Group 3. 



Mas. Corpus robustum, valde hirtum. Caput subtus densis- 

 sime pilosum. Facies parum convexa. Mystax densissime setosus. 

 Proboscis sublaticeolata. Thoracis latera et scutellum setosa. Ab- 

 domen alis multo longius. Pedes robusti, spinosi, pilisque longis 

 densissime hirti. 



Radial vein hardly undulating, joining the subcostal at some 

 distance from the tip of the latter. Cubital forked at half its 

 length ; forks very slightly curved, slightly approaching each other 

 towards each end ; fore fork forming at its base a slightly obtuse 

 angle, which emits a branch ; the latter is a little longer than the 

 inner side of the angle. First, second and third externo-medial 

 veins nearly straight; third forming a hardly obtuse angle with the 



PART III. 3 H 



