76 PROCEEDINGS OF THE ACADEMY OF [Part I 



riores, Brazil, November 14, 1919 (H. S. Parish). 

 Teffe, Brazil, December 22, 1919 (H. S. Parish). 



Gnophomyia bisecta Alexander. 



1920. Gnophomyia hisecta Alexander, Ent. News, vol. 31, pp. 72, 73. 



The type was from Parintins, Brazil, October 3, 1919 (H. S. 

 Parish). Other specimens were taken at Manaos, Brazil, October 31, 

 1919, and at Teffe, Brazil, December 16-23, 1920 (H. S. Parish). 



Gnophomyia osten-sackeni Skuse. 



1887. Gnophomyia fascipennis Osten Sacken, Berl. Ent. Zeitsch., Bd. 31, 



pt. 2, pp. 199, 200 (preoccupied). 

 1889. Gnophomyia osten-sackeni Skuse, Proc. Linn. Soc. New South Wales, 



ser 2, vol. 4, p. 825. 



The type was collected along the Amazon River by Bates. 



Gnophomyia leucoplaca sp. n. 



General coloration black; mesonotal scutmn, scutellmn and post- 

 notum and the dorsal sclerites of the pleura orange; wings dark 

 brown with a broad whitish crossband near midlength; cells of the 

 wing beyond the cord with abundant macrotrichiae. 



Female. — Length 7.7 mm. ; wing 7 mm. 



Rostrum and palpi black. Antennae black, rather long for this 

 sex, the segments oval. Head black. Pronotum black. Meso- 

 notal praescutum black, the lateral margins obscure orange; re- 

 mainder of the mesonotum orange. Pleura with the ventral sclerites 

 black, the dorsal region abruptly orange; a brownish spot beneath 

 the wing-root. Halteres brownish black, the extreme base of the 

 stem indistinctly paler. Legs black. Wings dark brown with a 

 broad whitish crossband near midlength; costal and subcostal cells 

 uniformly dark; base of the wing darkened to slightly beyond the 

 level of the origin of Rs, paler brown in the anal cells, this color 

 continued indistinctly along vein Cu to the wing-margin; wing- 

 apex dark brown, this including all of cells 3nd Ri, Ro, Rs, Rs, 2nd 

 Mi, the outer end of 1st Ri; the cephalic half of 1st M^; all but the 

 base of Ms and the outer cephalic end of Cui; the white crossband 

 includes all but the base and tip of cell 1st Ri; ends of cells R, M 

 and Cu; bases of cells 1st Mi, Ms and Cui. Conspicuous macro- 

 trichiae in cells 2nd Ri, R-,, Rs, Ri, 1st M2, 2nd M2, Ms and Cui, 

 thus occupying practically all the wing-disk beyond the cord. Vena- 

 tion: Sc moderately long, Sci extending to just before the end of 

 Rs, SCi rather close to the tip of Sci, the latter being a little shorter 

 than m; Rs long, gently arcuated; Ro+i shorter than the basal de- 

 flection of Cui; r on R^+s immediately before the fork; basal de- 

 flection of i?4+6 weakly angulated; cell 1st Mi small, subquadrate; 

 m and outer deflection of Ms subequal; basal deflection of Cui shortly 

 beyond the fork of M; vein 2nd A sinuous. Abdomen black. Ovi- 

 positor with the tergal valves slender, strongly upcurved. 



