96. BACCHA DISPAR, n. s. _Mas._ Cupreo-nigra, capite chalybeo-nigro
vittis duabus flavis, antennis rufis, thorace maculis quatuor luteis,
abdomine fasciis duabus arcuatis luteis, pedibus rufescentibus, alis
subcinereis, costa fasciaque nigricante fuscis, halteribus fulvis.
_Foem._ Scutello flavo apud discum nigricante, abdominis petiolo
fulvo, fascia 2^{a} non arcuata, apice chalybeo, pedibus testaceis,
posticis nigro fasciatis.
_Male._ Cupreous black; head chalybeous black, with a yellow stripe
on each side in front; antennæ red, very short; 3rd joint conical;
arista black, short; thorax with two luteous _spots_ on each side; the
1st pair joining a luteous band on each side of the pectus; abdomen
petiolated, clavate, with two much-arched luteous bands; legs reddish;
wings slightly cinereous, blackish-brown along the costa, and with an
irregular blackish-brown band, which hardly extends to the hind border;
veins black; halteres tawny.
_Female._ Scutellum yellow, with a blackish disk; abdomen much
compressed, with a long slender linear tawny petiole; the 2nd yellow
band not arched; tip chalybeous; legs testaceous; hind femora slightly
banded with black; hind tibiæ black towards the tips. Length of the body
4-1/2-5 lines; of the wings 8-9 lines.