366 DIPTERA. 
tip; the tarsi are black, sometimes the front tibie are infuscated. Halteres palerufous. Wings hyaline; 
the first posterior cell closed at the tip of the wing. 
Length 5:5-7 millim. (Bigot gives 6 millim.). 
Hab. Mexico 1, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith). 
Five male and two female specimens. They agree with Bigot’s description, which 
is evidently taken from a female specimen, his indication that it was a male being 
merely a slip of the pen or a typographical error. 
4. Micropeza nigricornis, sp. n., ¢ °. 
Cinereous ; thorax with two brown stripes ; front, occiput, and antenne black ; legs rufous, the femora with 
a blackish ring. 
Length 4 millim. 
Occiput more prominent than in the preceding species (1. obscura), shining black; front, face, and cheeks 
very narrow, the front black, the face and cheeks pale yellow. Antenne black ; the third joint rounded. 
Proboscis rufous. Thorax cinereous, with two brown stripes, and laterally, above the grey pleure, a 
black band extending from the shoulders to the base of the wings; scutellum blackish. Abdomen black, 
with whitish incisions, in the male clavated towards the end and with yellowish genitalia ; ovipositor of 
the female shining black. Legs rufous; the femora with the apex and a ring before it blackish ; tips of 
the tibie and the tarsi black. Halteres brown. Wings hyaline; first posterior cell narrowly opened, in 
one of the specimens closed at the tip of the wing. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (7. H. Smith). 
Two males and one female. 
5. Micropeza bilineata, sp. n., 2. 
Thorax cinereous, with two median stripes and some markings on each side brown; abdomen black, with 
white incisions ; antenne and legs rufous ; femora with two blackish rings. 
Length 7 millim. 
Head in profile somewhat triangular ; front nearly as broad as the eyes, black, with two rufous spots; face 
and cheeks yellow; occiput largely developed, black in the middle, with two white spots near the ocelli, 
the sides rufous, with a brown spot. Antenne short; basal joints black ; third joint rounded, rufous, 
the upper margin black; arista yellowish. Thorax cinereous, the shoulders rufous; thoracic dorsum 
with two brown median stripes, which do not reach the anterior border ; on each side of them are some 
brown lines and spots; scutellum brown, with the hind margin rufous ; pleure and metanotum grey. 
Abdomen black; hind borders of the segments narrowly white ; the underside rufous; ovipositor shining 
black, rufous in the middle. Legs rufous; the femora with the apex and two rings before it, the tibix 
towards the tip, and the tarsi, black. Halteres brown. Wings yellowish-hyaline ; third vein straight, 
the fourth slightly arcuated and joining the third at some distance from the tip of the wing. 
Had. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
Three female specimens. 
6. Micropeza stigmatica, sp.n.¢ ¢. (Tab. IX. figg. 17, ¢ ; 1’a, head in 
profile.) 
Thorax cinereous, with three brown dorsal lines; pleure with many small dots; antenne and legs rufous, 
the femora with two blackish rings. 
Length 5-7 millim. 
