196 Proceedings of the Biological Society of Washington. 



Andinoravinia rufipes, new species. 



Length of body, 8 to 9 mm.; of wing, 7.5 to 8 mm. One female, 

 Huariaca, canyon of the Rio Huallaga, Peru, 10,750 ft., December 20, 

 1913 (Townsend). One male and one female, Matucana, Peru, 8,000 ft., 

 May 1, 1914 (Townsend). Holotype, No. 21,575 U. S. N. M., being the 

 female from Huariaca. 



Blackish ; rather densely clothed with old-gold pollen, except the tarsi, 

 head appendages, frontalia and abdominal marmoration. Legs rufous, 

 except the black tarsi. Frontalia black, parafrontals blackish poster- 

 iorly. Antennae blackish, first two joints rufous. Palpi rufous-yellow. 

 Thoracic vittae brown, changing to brownish-gold when their pollinose 

 covering is viewed from the front. Marmorate markings of abdomen 

 black, in form of broken narrow median vitta and oblique curved marks 

 on each side. Hypopygium rufous. Tegulae whitish-tawny, faintly 

 yellowish infuscate. In the male the median abdominal vitta is entire. 



Prosthetocirca cana, new species. 



Length of body, 5 to 8.5 mm.; of wing, 4 to 7 mm. One male and one 

 female, Narborough Is., Galapagos, January 13 and 26, 1899; two males 

 and two females, Albemarle Is., Galapagos, January 1 to 18, 1899. Holo- 

 type, No. 21,576 U. S. N. M., female from Narborough Is. Allotype, 

 male from Albemarle Is. 



Blackish, densely ash-silvery pollinose. Frontalia and thoracic vittae 

 black to brown. Antennae blackish. Palpi rufous, shaded with black. 

 Hind edge of abdominal segments black, rather shining; in the male the 

 black shows a median vitta, and a linking of the lateral markings on last 

 two segments. Hypopygium black. Tegulae rather infuscate, the front 

 scale whitish. 



Gigantotheca galapagensis, new species. 



Length of body, 6.5 to 9.5 mm. ; of wing, 5.5 to 8.5 mm. Two males 

 and two females, Albemarle Is., Galapagos, January 18, 1899. Holotype, 

 No. 21,577 U. S. N. M. ; female. 



Coloring very similar in general effect to the preceding species, differing 

 as follows: Palpi black, the extreme base rufous. Hypopygium rufous. 

 Tegulae white. The lateral abdominal markings are more distinctly 

 linked up into lateral vittae of irregular outline, the curved links espe- 

 cially definite in male. 



Sarothromyiops cinctus, new species. 



Length of body, 10 mm. ; of wing, 8.5 mm. One male, Culpepper Is., 

 Galapagos, December 10, 1898. Holotype, No. 21,578 U. S. N. M. 



Black; densely silvery pollinose, the pollen with less of an ashy shade. 

 Palpi faintly rufous. Antennae and frontalia blackish. Thoracic vittae 

 black to brown. Hind margins of abdominal segments and narrow 



