LIST OF DIPTERA. 627 



the fourth far from the border. Subanal joining the anal near the 

 border. 



Erax Lades, Walk. 



Group 3. 



Fcem. Corpus vix mediocre. Caput subtus densissirae pilo- 

 sum. Fades convexa. Mystax setis paucis. Proboscis gracilis, 

 linearis. Antennarum articulus lus 2o duplo lonj>ior ; 3us lanceo- 

 latus, 1o vix brevior; arista 3o multo longior. Thorax abdominis 

 dimidio longior, setis nounullis lateralibus et posticis. Abdomen 

 oblanceolatum, alas vix superans, apice compressum et acuminatum, 

 non stylatum. Pedes robusti, spinosi, pubescentes. 



Cubital vein forked at much before half its length ; fore fork 

 forming at its base an almost right angle, the latter emitting a 

 branch, which is nearly twice the length of the basal side of the 

 angle; hind fork slightly curved. First and second externo-raedial 

 veins nearly straight; third curved, forming a slightly obtuse angle 

 with the prsbrachial, joining the fourth far from the border; sub- 

 anal joining the anal at a short distance from the border. 



Erax dilectus, Walk. 



Group 4. 



Corpus gracile, vix hirtum. Caput subtus dense pilosum- 

 Facies convexa. Mystax setis sat paucis. Proboscis gracilis, 

 linearis. Antennarum articulus lus 2o plus duplo longior; 3us 

 lanceolatus, lo vix brevior ; arista 3o paullo longior. Thoracis 

 latera et scutellum parce setosa. Abdomen alas vix superans. 

 Pedes sat graciles, parce setosi, vix hirti. Mas. — Sexualia medio- 

 cria. Fcem. — Abdominis quinties apicalis compressa, non stylata. 



Cubital vein forked at before half its length ; forks nearly 

 parallel to each other ; fore fork very slightly curved, inclined for- 

 ward at its tip, forming at its base an obtuse and rounded angle, 

 which emits no branch ; hind fork nearly straight. First and second 

 externo-medial veins nearly straight ; third slightly curved, forming 

 a very obtuse angle with the prfebrachial, joining the fourth far from 

 the border. Subanal joining the anal near the border. 



Erax Amphissa, Walk. 



This species appears to be on the limits of the genus Erax, and 

 may be an Eristicus of Loew. 



PART III. 3 I 



