36 DLPTEHA. 



Hab. Mexico, Amula 6000 feet and Omilteme 8000 feet, both in Guerrero (H. H. 

 Smith). 



Three specimens. 



The single male specimen has the whole anterior margin of the wing clouded, the 

 subcostal cell less dark, aud the scutellum dark above. 



11. Baccha punctifrons, sp, 2 . 



Head yellow, a triangular brownish spot on the frontal triangle above ; below, above the base of the antennaj, 

 in both sexes, a round black spot; front of the female very narrow above, black at the vertex, and with 

 a slender brown stripe, obsolete below. Third joint of the antennae orbicular, somewhat blackish above. 

 Mesonotum shining bronze, obsoletely striped in the middle ; the lateral margins, the scutellum, and a 

 large part of the pleurse yellow ; the pleuras elsewhere shining blue-black. Abdomen dark brown ; third 

 segment slender, cylindrical ; second, third, and fourth segments each with an oblique yellow spot. Legs 

 yellow ; the hind femora with a brown or brownish preapical ring, and the hind tibiae at the tip and the 

 hind metatarsi more or less brown or brownish. Wings subhyaline, greyish or yellowish, the narrow 

 costal border brown or blackish, more diffuse beyond the subcostal cell, more yellow in the costal cell ; 

 aluke rudimentary, the anal angle convex on its lower border basally, and hence not remarkably 

 acute. 



Lcngth 8-9 millim. 



Hah. Mexico, Amula 6000 feet. Omilteme 8000 feet, Xucumanatlan 7000 feet, and 

 Sierra de las Aguas Escondidas 9500 teer, all in Guerrero (//. H. Smith). 



Six specimens. 



12. Baccha laudabilis, sp. n., $ . 



Front narrow above, black, yellow on the sides below, and with two small yellow spots above the base of thc 

 antennaj. Antennas nearly black ; third joint orbicular. Face yellow, somewhat recldish in the middle ; 

 cheeks and mentum yellow. Mesonotum opaque black, with obscure narrow stripes in front ; the narrow 

 lateral margin and the margiu of the scutellum yellow ; scutellum elsewhere brown. Pleurae blue-black, 

 lightly whitish-pollinose ; mesoplcurse with a small yellow spot. Abdomen black ; second and third 

 segments cylindrical ; flrst segment on the sides light yellow ; second, third, and fourth segments at the 

 base on each sido with an oblique reddish-yellow spot. Wings hyaline ; the costal, subcostal, and mar- 

 ginal cells (save the base of the marginal) wholly dark brown, the brown extending beyond them and 

 filling out the first basal cell to the false vein and the submarginal ccll, except a long semioval space 

 beyond the cross-vein. Alulae rudimentary. 



Length 9-10 millim. 



Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 7000 feet (H. H. Smith). 

 One specimen. 



A male example from Amula (alt. 6000 feet, H. H. Smith) has a large shield-shaped 

 blackish spot on the front, brownish cheeks, brownish-yellow antennse, the lateral 

 yellow stripes of the mesonotum reaching only to the suture, a large yellow spot on the 

 pleurse, the terminal abdomiual segments marked somewhat differently, and the brown 

 of the wings contined to the costal and subcostal cells and the tip of the marginal 

 and submarginal cells. I doubt its identity. 



