MISCHOGASTER.—RICHARDIA. 385 
MISCHOGASTER. 
Mischogaster, Macquart, Suites & Buffon, ii. p. 483 (Michogaster) (1835). 
1. Mischogaster nitidipennis, sp.n., ¢. (Tab. X. figg. 16; 164, tip of the 
abdomen.) 
Shining black ; wings hyaline, the costa to the termination of the first vein and the apical third black. 
Length 12°5 millim. 
Body slender. Head rounded, black ; the face slightly whitish ; front as broad as the eyes, with parallel sides ; 
cheeks narrow. Antenne black; third joint twice as long as the second; arista microscopically 
pubescent. Thorax, scutellum, and abdomen shining black; abdomen cylindrical, attenuated towards the 
base; anal segment with a pair of filiform, apparently jointed, appendages beneath. Legs elongate ; 
hind tibie slightly curved, very thin at the base, but gradually enlarged towards the tip; middle tibie 
with a strong spur. Halteres yellow. Wings broad, very glossy, hyaline; the costa to the end of the 
first vein and the apical third black; auxiliary vein coalescent with the first vein; terminal section of the 
third and fourth veins nearly parallel; small cross-vein a little beyond the middle of the discal cell; 
posterior cross-vein curved ; third basal cell rounded at the tip. 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
A single male specimen. The species is closely allied to, and perhaps not different 
from, M. niger, Schin. (Dipt. Novara Reise, p. 256), from South America. Schiner, 
however, explicitly says: “thorax and scutellum not shining, the antenne brownish, 
and the arista yellowish,” whilst the example before me has the whole body shining 
and the antenna, including the arista, black. 
RICHARDIA. 
Richardia, Robineau-Desvoidy, Essai sur les Myodaires, p. 728 (1830). 
Of this genus four species are represented in the Mexican collections before me :— 
l. Fore coxe black. 2. 6 6 we we ee ee ee ee 
Fore coxe yellow . .... . . . . oe ew ee BD 
2. Abdomen steel-blue ; median band of the wings attenuated towards the 
hind margin . . . Soe ee ee ee ee we we .) podagrica, Fabr. 
Abdomen metallic black, the first segment rufous; median band of the 
wings not attenuated posteriorly . . .. . - . « « viridiventris, v. d. W. 
3. The brown apical spot of the wings large, reaching the end of the second 
vein; basal segment of the abdomen rufous in the male. . . . . elegans, v. d. W. 
The brown apical spot of the wings small, not reaching the second vein; 
basal segment of the abdomen not rufous. . . . . . . . . . concinna, v. d. W. 
1. Richardia podagrica. 
Dacus podagricus, Fabr. Syst. Antl. p. 272°. 
Cordylura podagrica, Wiedem. Aussereur. zweifl. Ins. 11. p. 445, t. 10 a, fig. 5 (not 9, as in the text) *, 
Richardia podayrica, Macq. Dipt. Exot. 11. 3, p. 205, t.. 27. fig. 8°; Rond. Stud. Ent. i. p. 82°; 
Gerst. Stett. ent. Zeit. xxi. p. 163°; Schiner, Reise der Novara, Dipt. p, 259°. 
Richardia saltatoria, Rob.-Desv. Essai sur les Myodaires, p. 728’. 
BIOL. CENTR.-AMER., Dipt., Vol. I., February 1899. 3d 
