564 LIST OF DIPTERA. 



1. NUSA JiQUALIS. 



Nusa aequalis, Diptera Saundersiana, Pt. 2, 105„ 

 East Indies. 



2. Nosa Formio. 

 Nusa Formio, Diptera Saundersiana, Pt. 2, 106. 

 East Indies. 



Genus 7. AMPYX. 



Corpus gracile, nitens, raro pubescens. Mystax hreviter pilosus. 

 Proboscis lanceolata, porrecta. Antennarum articulus 3us latus, 

 ovatus, lo et 2o conjunctim brevior. Pedes lougi, graciles, et parce 

 setosi ; tibiae posticas clavatae ; tarsi postici dilatati. 



Body slender, shining, thinly covered with down. Face 

 slightly convex towards the epistoma. Mystax with some short 

 hairs. Proboscis porrect, lanceolate. Third joint of the antennae 

 broad, oval, not so long as the first and the second together. Legs 

 long, slender, with a few bristles, which are longest on the tibiae ; 

 hind tibiae clavate ; hind tarsi incrassated. Wings rather long and 

 narrow. Fore fork of tl?e cubital vein slightly undulating ; hind 

 fork very slightly curved, almost parallel to the first exteruo-medial ; 

 second externo-inedial straight ; third forming an obtuse angle with 

 the praebrachial, joining the fourth very near the border. Subanal 

 joining the anal on the border. 



Megapoda crassitarsis and M. cyaneiventris, Macq. may belong 

 to this genus. 



1. Ampyx varipennis. 



Niger ; antennarum articulus 3us et pedes rufi ; tibia apice tarsi- 

 que nigra ; alee limpida, apud medium fuscescentes. 



Black, shining. Third joint of the antennae and legs red. 

 Tarsi and tips of the tibiae black. Wings limpid, with two brownish 

 bands, one before the middle darker than the other, which is beyond 

 the middle ; veins black. Length of the body 1 1 lines ; of the wings 

 9 lines. 

 a. Santarem, Brazil. From Mr. Bates' collection. 



Genus 8. LAPHYSTIA. 



Antennarum arista terminalis distincta, biarticulata, obtusa. 

 Alarum vena longitudinales la et 2a in ipso margine contiguae. 



Laphystia, Loew, Linn. Ent. ii. 538. 



