LIST OF DIPTERA. 771 



borders of the second and third segments luteous on each side. 

 Legs long and slender ; hind legs brown, their femora luteous 

 towards the base, and with a luteous band near the tips. Wings 

 violet-brown, nearly limpid towards the tips, which are gray ; some 

 nearly hyaline streaks towards the hind border. Length of the 

 body 6 lines ; of the wings 10 lines. 

 a. Ega, on the Amazon. From Mr. Bates' collection. 



17. Leptogaster fuscipennis. 



Nigricans ; fades albido sericea ; thoracis latera testaceo lineata ; 

 pedes fusco-nigri ; aim lota: nigricantes. 



Gonypes fuscipennis, Blanch. Gag, Hist, de Chile, Zool. vii. 371, I - 

 Atlas, pi. 3, f. 6. 



Santiago. 



18. Leptogaster rubidus. 



Rubidus ; abdomen incisuris luteis ; pedes fiavescentes, femoribus 

 anlenoribus apice posticisque totis fuscis ; aim Jlavidm, apice 

 fuscanm. 

 Leptogaster rubidus, Wied. Dipt. Exot. i. 242. Auss. Zweifl. i. 

 533,2. 



South America. 



19. Leptogaster bicolor. 



Fcem. Thorax testaceus nitidus ; abdomen fuscum, incisuris 

 jlavidis ; pedes fulvi ; aim subhyalinm. 



Gonypes bicolor, Macq. Dipt. Exot. Suppl. 3, 31, 3. 



Rio Negro. 



20. Leptogaster ferrugineus. 



Mas. Ferrugineus ; pectus thoracisque latera cana ; abdomen 

 supra nigricans ; femora postica fascia subapicali fulva ; aim 

 subcinerem, venis nigris ; halteres albi, apice fusci. 



Male. Ferruginous. Proboscis and antennae tawny. Pectus 

 and sides of the thorax hoary. Abdomen blackish above. Legs 

 moderately stout; hind femora with a tawny subapicnl band. Wings 

 very slightly grayish ; veins black. Halteres white, with brown 

 knobs. Length of the body 7 lines ; of the wings 10 lines. 



a. Para. From Mr. Bates' collection. 



PART III. 3 X 



