628 LIST OF DIPTEHA. 



Group 5. 



Mas. Corpus parce et breviter hirtum. Caput subtus derisis- 

 sime pilosum. Facies valde convexa. Mystax dense setosus. 

 Proboscis sublanceolata. Antennarum articulus lus 2o duplo lon- 

 gior; 3us longiconicus, lo brevior; arista 3o plus duplo longior. 

 Thoracis latera et scutellutn parce setosa. Abdomen alis paullo 

 longius. Sexualia maxima, hirta. Pedes robusti, breviusculi, spi- 

 nosi, parce hirti. 



Cubital vein forked at beyond half its length ; forks hardly curved, 

 very slightly converging at each end ; fore fork emitting at its base 

 a slightly obtuse angle, which emits a branch ; the latter is as long 

 as the basal side of the angle. First, second and third externo- 

 medial veins nearly straight; third forming an almost right angle, 

 with the praebrachial, joining the fourth very far from the border. 

 Subanal joining the anal very near the border. 



Erax obscurus, Macq. 



Group 6. 



Corpus crass urn, vix hirtum. Caput subtus dense pilosum. 

 Facies convexa. Mystax setis plurimis. Proboscis lanceolata. 

 Antennarum articulus lus 2o fere duplo longior; 3us lanceolatus, 

 lo aequalis;' arista 3o multo longior. Thoracis latera et scutellum 

 setis nonnullis. Abdomen alas non superans. Pedes robusti, spi- 

 nosi, breviter hirti. Mas. — Sexualia mediocria. Fcem. — Abdomen 

 apice compressum, non stylatum. 



Cubital vein forked at much before half its length ; forks 

 approaching much nearer each other towards the base than towards 

 the tips ; fore fork nearly straight, forming at its base a slightly ob- 

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

 basal side of the angle. First and second externo-medial veins 

 nearly straight; third slightly curved, forming an almost right 

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

 Subanal joining the anal rather near the border. 



This is one of the least typical groups of Erax. 



Erax striola, Fabr. 



Group 7. 



Mas. Corpus vix hirtum. Caput subtus [densissime pilosum. 

 Facies convexa. Mystax parce setosus. Proboscis sublanceolata. 



