348 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



and three strong and long pairs of lateral bristles. First abdominal 

 segment without median macrochsetse, second with a median mar- 

 ginal pair of short ones, third with a marginal row of ten or twelve 

 countmg those on venter, anal segment with several subapical 

 bristles. 



Differs from Salmacia in the head not being excessively swollen, in 

 the proclmate ocellar bristles, and other characters as given. Differs 

 from Goniomima in the long second aristal jomt, the stouter arista; 

 and other characters as given above. 



Reproductive habit unknown, but almost certainly leaf-oviposition 

 of microtype eggs. 



Type-species. — Protogonia ocellaris, new species. 



PROTOGONIA OCELLARIS, new species. 



Length of body, 11 mm.; of wing, 9.5 mm. One male, Eio Suyo, 

 western base of Cordillera Occidental, extreme northern Peru, about 

 1,500 feet, November 20, 1910. 



Head silvery-white with a more or less distinct golden tinge below 

 which becomes pronounced on parafrontals. Frontalia dark brown. 

 First two antennal joints reddish-yellow, third joint and arista dark 

 brown. Palpi light brownish-yellow. Occiput ashy, beard grajdsh- 

 white. Pleurae and mesoscutum silvery, five distinct ^dtt9e. Scutel- 

 lum reddish, base darker, thinly silvery over all. Abdomen reddish 

 throughout, posterior portion of third segment brownish, an indis- 

 tmct median vitta brownish, anal segment thickly light golden 

 pollinose, other segments sDvery-white pollinose appearing thinly 

 or thickly so according. to varjong light, third segment more tliickly 

 so and with a tinge of golden to the pollen. All cf venter silveiy- 

 white except the light golden anal segment. Legs brownish, tibias 

 reddish, femora silvery. Wings clear, tegulae white. 



Type.— C&t. No. 15190, U.S.N.M. 



TRIACHORA EQUINOCTLA.LIS, new species. 



Length of body, 10 to 11 mm.; of wing, about 8 mm. Numerous 

 specimens of both sexes, Piura, Peru, October 28 to November 8, 

 1910, and later, on flowers of species of Mikania. 



This form has orbital bristles in both sexes, normally three pro- 

 clinate and one reclinate. The male has the front not quite so wide, 

 the claws and pulvilli more elongate, the second antennal jomt only 

 moderately elongate and the third joint strongly so, latter being three 

 or four times length of second. The female has the second antennal 

 joint more strongly elongate, the third joint being hardly more than 

 twice length of second. 



All of face and cheeks silvery-white pollinose, the facial plate being 

 same as the other parts. Entire front pellucid brownish-golden, the 



