BACCHA. AS 
with differently shaped frons, and narrower wings, with a different 
pattern. 
Frons shining bluish black at the vertex, with a grey band before 
the ocelli; antennal tubercle less prominent, yellow, black behind ; 
ocellar tubercle only slightly prominent; frons clothed with short 
pale hair; face and peristoma wholly reddish yellow, the facial 
tubercle more prominent than in picta; antenne and arista orange- 
coloured; the eyes do not seem to be banded. Occiput black, 
ereyish-dusted, whitish on the lower orbits; the occipital fringe 
seems to be limited to the superior part. Thorax and_scu- 
tellum entirely shining reddish, with very short whitish hair ; 

Fic. 9.---Baccha helva,sp.n. Q@. X 4 
pleure paler above, darkened below like the pectus, with very 
short hair. Squamule yellowish, with a short golden fringe ; 
halteres yellowish. Abdomen proportionally shorter and broader, 
the second segment being as long as the third; it is wholly reddish, 
with indistinct black spots at the end of the second and on the 
posterior corners of the third and fourth segments; hair on the 
stalk pale and erect, on the rest dark and depressed. Legs includ- 
ing the cox wholly yellow, without any dark marking. Wings 
distinetly less broad than in picta; third vein sinuous as in picta, 
and the seventh likewise, the anal cell therefore suddenly constricted 
to a point before its end. The wings are blackish brown, but with 
a broad and complete hyaline band, and besides with hyaline alula 
and hyaline base of anal and axillary cells; the middle vellowish 
spot is not a simple streak, but is more than double as broad, 
extending to the small cross-vein and leaving a whitish spot in the 
submarginal cell just above the bifurcation of the second and third 
veins; apical isolated spot as in picta. 
