716 



LIST OF OIPTERA. 



lateralibus et posticis. Abdomen gracile, suboblanceolatum, tborace 

 duplo longius, incisuris utrinque parce setosis. Sexualia minima. 

 Pedes validi, spinosi, parce hirti. 



Wings ribbed transversely, and slightly dilated in front along 

 the stigma. Cubital vein forked at a little before two-thirds of its 

 length ; fore fork slightly undulating ; hind fork nearly straight. 

 Externo-medial veins nearly straight; third forming an obtuse angle 

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

 Subanal joining the anal near the border. Discal aveolet very 

 narrow, except at each end, on account of the curve of the preebra- 

 chial hind fork. 



Asilus dubius, Macq. 



Group 3. 



Fcem. Corpus gracile, fere nudum. Caput subtus pilosum. 

 Facies plana. Mystax parvus, setis paucis. Proboscis gracilis, 

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

 lalus, lo vix brevior; arista So paullo longior. Thoracis latera 

 setis paucis. Abdomen longi-oblanceolatum, tborace triplo longius. 

 Pedes graciles, breviusculi, parum spinosi. 



Radial vein curved at its tip. Cubital forked at before half its 

 length; fore fork forming at its base a slightly obtuse angle, which 

 emits a branch, hardly curved from thence to its tip; hind fork 

 curved towards the first externo-medial, and joining it close to the 

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

 third slightly curved, forming an obtuse angle with the praebrachial, 

 joining the i'ourth far from the border. Subanal joining the anal 

 very near the border. 



Asilus femoralis, Wied. 



Group 4. 



Mas. Corpus longiusculum, fere nudum. Caput ademptum. 

 Thoracis latera et abdomen setis paucis. Abdomen vix oblanceola- 

 tum, apice fascicu latum, thorace plus duplo longius. Sexualia 

 parva. Pedes graciles, setosi, vix hirti. 



This differs much from the other groups of Asilus, aud may 

 possibly belong to another genus. 



Radial vein joining the subcostal very far from the tip of the 

 latter. Cubital forked at about two-thirds of its length ; fore fork 

 nearly straight, joining the subcostal very near the tip of the latter ; 



