FAMILY MIDASIDA. 51 
Species 1V.—M., rubidapex, Wied. (Mon. Mid, pl. 52, f. 2.) Niger antennis apice rubris 
alis rubido-flavis extrema basi nigris. Long. lin. 17—19. Mexico. 
Species V.—M. mystaceus, Wied. (Mon. Mid. pl. 52, f. 3.) Ater antennis rubidis, 
epistomate utrinque albo-piloso@. Long. lia, 16. Surinam. 
Species VI.—M. annulicornis, Westw. n. sp. Pl. 13, flg. 2. Niger barba epistomatis 
nigra, antennis (nisi articulis 2bus basalibus) fulvo-rubris, annulo nigro ad apicem articuli 
3tii; thorace vix cinereo vittato, abdominis segmento 2do nigro-viridescenti, 3bus 
ultimis nigro-cerulescentibus. Alis fusco-nigricantibus, basi venis obscurioribus, margine 
postico pallidius infumato 9. Long. corp. lin. 16. Exp. alar. 2 unc, 8 lin. 
Habitat in Brasilia. Mus. D. Miers. 
Species VII.—M. Bonariensis, Serville, Guér. Icon. R. An. Ins. pl. 97, f.5. (Buenos 
Ayres.) 
The description of this species has not yet been published. 
Species VIII.—WM. nitidulus, Oliv. (Enc. Méth. 8, p. 83. Wied. Mon. Mid. pl. 52, f. 4.) 
Thorace nigro albido-vittato ; abdomine subcupreo, utrinque viridi-aureis maculis, alis 
translucidis fusco nonnihil ad costam tinctis. Long. lin. 16. 
(Syn. M. nitida. Lichtenst. Mus. Holthuys. p. 213). 
Species IX.—M. crassipes, Westw. n. sp. Pl. 13, f. 3. Totus niger, thorace abdomineque 
nitidis, antennis brevioribus, pedibus brevibus femoribus posticis incrassatis dentatis, alis sub- 
pellucidis, vena 3tia longitudinali apiceque fusco tinctis. 9. Long. corp. lin. 16. Exp. 
alar. 21 unc. 
Habitat in America septentr.? Mus. Hope, e Mus. Children. 
Species X.—M. tricolor, Wied. (Mon. Mid. pl. 53, f. 5.) Thorace femoribusque posticis 
rubidis ; epistomate aurato: abdomine chalybeo. Long. corp. lin. 13 
Habitat in insula Cuba. 
Species XI.— WM. tibialis, Wied. (Mon. Mid. pl. 53, fig. 6.) Niger tibiis tarsisque flavis 
alis fuscanis. Long. lin. 13. ¢. Ex Baltimore. 
Species XII.—M. politus, Wied. (Mon. Mid. pl. 53, f. 7.) Thorace nigro glabro, abdomine 
cupreo 3 alis nigris, pedibus ferruginosis. Long. lin. 13. 2. 
Habitat—? 
Species XIII.—M. auripennis, Westw. (in Lond. and Edinb. Phil. Mag. April, 1835), 
Pl. 14, fig. 1. Niger, capite, antennis, collo, angulis anticis thoracis, abdomine (segmento 
basali marginibusque 3tii segmenti supra et segmentis tribus intermediis subtus) pedibus- 
que (nisi femoribus ad basin) late fulvis ; alis auricoloribus macula versus apicem costs 
nigra margineque interno pellucido; mesosterni lateribus unispinosis. Long. corp. lin. 11]. 
Expans. alar. lin. 19. 
Habitat in Nova Hollandia. Mus. Hope et nostr. 
Obs.—The veins of the wings in this species differ from those of 
all the others, the anterior branch of the fourth longitudinal vein 
dividing and forming a small closed oval cell (appendiculated at its 
extremity, but wanting the small oblique appendiculated vein at its 
base above) near the apex of the wing, whilst the long closed cell 
near the middle of the hind margin is not pedunculated at the 
extremity most distant from the body, as in almost every other 
species. 
Sprecrrs XIV.—M. clavatus. Niger, abdominis segmento 2do aurantiaco; alis nigris, 
Long. lin. 10—12. 
Habit in Amer. Boreali. 
Syn. Musca clavata, Drury. Ill. vol. 1, pl. 44, f. 1. App. vol. 2 (1773). 
Nemotelus asiloides, De Geer, Mem. v. 6, t. 29, f. 6. 
Bibio filata, Fabr. Mantissa, Ins. ii. p. 328. 1. (1787.) 
Mydas f., Fabr. Syst. Antl. Midas f. Wied. Mon. Mid. pl. 53, f. 8. 
Bibio illucens, Fabricius. Syst. Ent. 756. 1. 
Species XV.—WM. atratus, Macq. (Dipt. Exot. t. 1,’pars 2, p. 11.) Niger, abdomine 
depresso ? , segmento ultimo supra macula rufescenti, alis fuscis venis obscurius margi- 
natis. Long. corp. 11 lin. @ @. 
Habitat—? An var. precedentis ? 
