84 LIST OF DIPTERA. 



17. Nemotelus NILOTICUS. 



Mas. Niger ; abdomen albidum, basi macula nigra; pedes fulvi, 

 femoribus basi nigris ; alee hyalince. 



Nemotelus niloticus, Olivier, MSS. Macq. Dipt. Exot. i. 1, 205, 1, 

 pi. 25, f. 3 ; i. 2, 191. 



Egypt. 





Country unknown. 



18. Nemotelus advena. 

 Nemotelus advena, Diptera Saundersiana, Pt. 2, 80. 



Genus 24. BIASTES. 

 Biastes, Diptera Saundersiana, Pt. 2, 80. 



1. Biastes Indicus. 



Biastes Indicus, Diptera Saundersiana, Pt. 2, 81. 

 a. East Indies. From Mr. Saunders' collection. 



Genus 25. METABASIS. 

 Metabasis, Diptera Saundersiana, Pt. 2, 81. 



1. Metabasis eosteatus. 



Metabasis rostratus, Diptera Saundersiana, Pt. 2, 81. 

 Brazil. 



Genus 26. BASENTIDEMA. 



Corpus longum, lineare. Facies declivis. Antenna? 7-articu- 

 latae ; articulus lus conicus ; 2us cyathiformis ; 3us, 4us, 5us, et6us 

 brevissimi, flagellum rotundatum fingentes ; 7us setiformis, longis- 

 sima, terminalis. Scutellum muticum, bituberculatum. Abdomen 

 elongatum. Tibiae posticas subindentatse. 



Basentidema, Macq. Dipt. Exot. i. 1, 197. 



