622 LIST OF DIPTERA. 



fourth far from the border. Male. — Branch of the fore fork of the 

 cubital vein shorter than the basal side of the angle. Fern. — Branch 

 shorter than the angle. 



Erax Caudex, Walk. 



Group 2. 



Mas. Corpus 'mediocre, robuslum, hirtum. Caput subtus, 

 densissime pilosum. Facies valde convexa. Mystax densissimus. 

 Proboscis lauceolata. Antennarum articulus lus 2o plus duplo 

 longior; 3us longiconicus, lo multo brevior; arista 3o triplo lon- 

 gior. Thoracis latera parce setosa. Abdominis dimidium basale 

 pilosum. Sexualia maxima, subtus hirsutissima. Pedes validi, 

 pilosi, spinosi. 



Wings ribbed and slightly dilated in front along the stigma. , 

 Cubital vein forked at very much beyond half its length ; forks 

 hardly undulating ; fore fork forming near its base an obtuse angle, 

 which emits a very minute rudimentary vein. First and second 

 exiemo-medial veins almost straight ; third hardly curved, forming 

 •a nearly right angle with the proebrachial, joining the fourth far 

 from the border. Subanal joining the anal at some little distance 

 from the border. 



Erax fortis, Walk. 



Group 3. 



Mas. Corpus sat gracile, vix hirtum. Caput subtus pilosum. 

 Facies convexa. Mystax setis paucis. Proboscis sublanceolata. 

 Thoracis latera et scutellum parce setosa. Abdomen alas superans. 

 Sexualia magna. Pedes validi, parce spinosi ; femora subpilosa. 



Radial vein as usual. Cubital vein forked at very much 

 beyond half its length ; forks slightly curved, converging more 

 towards the base than towards the tips ; fore fork emitting at 

 its base a slightly obtuse angle, which emits a branch ; the latter is 

 not more than half the length of the basal side of the angle. 

 Externo-medial veins nearly straight ; third forming a hardly obtuse 

 angle with the prabrachial, joining the fourth far from the border. 

 Subanal joining the anal near the border. 



Erax Halcesus, Walk. 



21. Erax Caudex. 

 Asilus Caudex, Cat. of Diptera, Pt. 2, 404. 



