644 LIST OF IHPTERA. 



b. Furca cubitalis antica ramulo nullo. - robustus, Walk. 



B. Tibiae nigra;. Marcinus, Walk. 



B. AI33 fulvae aut flavesceutes. 



A. Pedes nigri. nervosus, Macq. 



B. Femora nigra. asper, Walk. 



C. Femora rufa, nigro viltata. 



a. AI33 subfulvaa, apice cinereae. - Leon, Walk. 



b. Ala? fulva3. ------ concolor, Walk. 



D. Tibia; luteae, apice nigral. - nitidus, Wied. 



Group 1. 



Fcem. Corpus gracile, parum birtum. Caput subtus dense 

 pilosum. Facies convexa. Mystax raro setosus. Proboscis linea- 

 ris. Antennarum articulus lus 2o triplo longior ; 3us sublinearis, 

 lo Eequalis ; arista 3o paullo longior. Thoracis latera et scutellum 

 setis paucis. Abdomen alas non superans, apice compressum, acu- 

 minatum. Pedes sat graciles, fere nudi, parce spinosi. 



Radial vein very slightly curved, joining the subcostal near the 

 tip of the latter. Cubital forked at about half of its length ; fore 

 fork forming at its base a nearly right angle, which emits a branch 

 much shorter than its basal side ; hind fork and the first and second 

 externo-medial veins almost straight. Third externo-medial curved, 

 forming a slightly obtuse angle with the praebrachial, which is 

 slightly curved, joining the fourth far from the border. Subanal 

 joining the anal rather near the border. 



This group is almost as nearly allied to Asilus as to the type 

 of Erax. 

 Erax Malis. 



Group 2. 



Mas. Corpus breve, crassura, hirtum, sat magnum. Facies 

 valde convexa. Mystax densissime setosus, usque ad antennas 

 ascendens. Proboscis valida, lanceolata. Antennarum articulus 

 lus 2o plus duplo longior; 3us lougiconicus, lobrevior; arista 3o 

 plus duplo longior. Thorax cristatus. Abdomen thorace multo 

 longius, alas non superans. Sexualia maxima. Pedes crassi, hirti, 

 spinosi, breviusculi. 



Wings slightly dilated in front at two-thirds of the length. 

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

 diverging, then converging, and again diverging at the tips. 

 First and second externo-medial veins nearly straight ; third hardly 



