6 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.76 



Described from one male and one female; the male was collected 

 at La Suiza, Costa Rica, March 8, by Pablo Schild, and is from 

 Professor Melander's collection. The female was collected at 

 Amecameca, Mexico, September, 1900, by O. W. Barrett. 



r?/y?e.— Male, Cat. No. 41810, U.S.N.M. 



The species agrees exactly with the generic characters of Gaediop- 

 sis, except in the absence of the ocellar bristles. In this respect it 

 agrees with Eugaediofsis Townsend (type oceUaris Coquillett). At 

 present I am inclined to regard the absence of ocellar bristles as not 

 a sufficient character to establish a genus. 



Genus EUANTHA Van der Wulp 



Euantha Van der Wulp, Tijsch. v. Ent., vol. 28, 1885, p. 198 ; Biologia, Dipt., 

 vol. 2, 1891, p. 248. — Brauee and Beegenstamm, Zweifl. Kais. Mus., pt. 4, 

 1889, p. 137; pt. 6, 1893, p. 128.— Townsend, Anuals and Mag. Nat. Hist., 

 vol. 19, 1897, p. 34.— Adams, in Williston's Manual N. A. Dipt., 1908, 

 p. 356.— Aldrich, Proc. U. S. Nat. Mus., vol. 72, art. 7, 1927, p. 28. 



The type species is Dexia liturata Olivier. Townsend ^ has 

 written that Euantha is a synonym of Sophia Robineau Desvoidy,^ 

 but there are great discrepancies between his descriptions and the 

 species of Euantha^ so I can hardly believe that the genera are the 

 same. A key to the species has been published by me. 



EUANTHA FLAVA, new species 



Female. — Wholly yellow except the tarsi, which are black, and the 

 tip and hind margin of wing, which are infuscated. The single 

 specimen has been considerably damaged, the lower part of the head 

 pressed in. The front, as in females of the type species, is shining 

 on both sides of the narrow frontal stripe, but has a narrow pollinose 

 yellow orbit- Third antennal joint a little longer than second, the 

 arista with erect plumosity ; vibrissae large ; only one pair of vertical 

 bristles; ocellars minute, or perhaps wanting; frontals about six, 

 barely reaching to base of antennae; back of head shining, with 

 yellow hair; only a few coarser black hairs above. Thoracic chaeto- 

 taxy : Dorsocentral 3, 3 ; acrostichal 0, ; humeral 2, presutural 1, 

 notopleural 2 ; mesopleural with only 1 posteriorly ; sternopleural 1 ; 

 hypopleural 1 ; supraalar 2 ; intraalar 1 ; postalar 2 ; scutellum with 

 2 lateral, 1 apical, of good size and decussate, no discal. Postscu- 

 tellum distinct but not large. Calypters very small. 



Abdomen fusiform, considerably narrowed at base, one and one- 

 half times as* long as thorax, composed of five evident segments, the 

 basal one more distinct than usual. The first of the larger segments 

 has a pair of large median marginals and three lateral in a diagonal 



^ Revista Mus. Paul., vol. 15, 1926, p. 218. = Myodaires, 1830, p. 317. 



