GENUS CORETHRA ' 503 



Loew. The shaft of the antennae distmctly banded brown, with 

 yellowish-white haurs ; eyes black. Thorax with three yellowish-brown 

 stripes ; the middle one smaller behind and the others smaller in front. 

 Wings with extremely clear brown spots. Legs with numerous brown 

 dots ; ^ , very pale yellowish, clothed with long fuscous hairs and with 

 down. Antennae banded black, with dense dusky verticils ; dorsum of 

 the thorax marked with three black lines, the median one of which is 

 doubled behind, while the lateral ones do not quite reach the front. 

 Scutellum fuscous laterally. Metanotum nearly black. Abdomen with 

 black bands. Legs pale yellow, the first tarsal joint somewhat fuscous 

 from the apex ; the apices of the femora, and the bases and apices of the 

 tibiae banded black. Wings ornamented with rather small greyish-black 

 spots. Length of the body 2^ lines ; of the wings, 2^ lines. 



Hahitat.—M.aAne, Osten-Sacken ; Pennsylvania, Say. 



Noted from the island of Porto Rico by V. von Roder, in " Entomolog. 

 Zeitung." Stetin, 1885, p. 338. 



4. CORETHRA GIBBA, Meigen. 



Wings with an obscure band. Characters of anteunse and 

 legs not stated. Greenish. 



Description from " Nouveau Diet. d'Hist. Nat.," article " Corethra.'' 

 — Green, with the corselet elevated and prolonged in front, and the wings 

 white and marked with an obscure band. 



5. CORETHRA PILIPES, Gimmerthal. 



Wings unspotted (?). Legs with apices of the tibiae and 

 tarsal joints darker. Antennae unhanded (?). Legs beset with 

 long hairs on the inner and outer sides. 



Description from Gimmerthal, " Bull. Soc. Imp. Naturalistes de 

 Moscou," xviii, p. 279 (1845). — Head and thorax brown, the latter 

 with some yellowish pubescence and scarcely visible darker stripes, the 

 middle one of which is divided by a deeper longitudinal hne ; palpi and 

 antennae brown. Abdomen greyish-brown, with pale yellow incisurae, and 

 long hairs on either side. Legs pale yellow ; the apices of the tibiae and 

 of the tarsal joints brownish ; all the legs beset with long hairs on the 

 inner and outer sides, which forms the distmguishing character of the 

 species ; halteres dirty yellow. Wings yellowish on the costa. Length. — 

 3 lines ((J). Mr. Theobald believes this to be identical with Cor. Nyhlcei. 



Habitat. — Riga. 



6. CORETHRA PLUMICORNIS, Fabr. 



Wings unspotted. Legs uniformly coloured. Antennye red- 

 dish, with brown bands. Abdomen pale brown. 



