140 KANSAS UNIVERSITY QUARTERLY. 
discal cell; the vein closing the anal cell almost straight; the little 
crossvein, connecting the auxiliary vein before its apex with the | 
first longitudinal vein, present. 
A single female specimen from Lawrence, Kansas, captured by 
the writer July 4, 1894. It was resting on leaf of Cowaolvulus 
| sepium L, ; 
| ‘ fasily distinguished from the previously described species by the 
| short and at distal end broader second abdominal segment, the 
much elongate, in its middle narrowed, third antennal joint (like 
that of Microdon variegatus Walker, Ins. Saund. Dipt., p. 220, pl. 
vi, fig. 6; and AZicrodnn pachystylum Williston, Synops. N. Am, H 
Syrph., p. 8), and the venation of the wings. Notwithstanding the 1’ 
shortness of the second abdominal segment, the pedunculate base | 
of abdomen, though short, and the general appearance will place 4 
this species in the genus AZixogasier. I have before me males and 
females of MZixog. conopsoides Macq. from Brazil (Dr. Williston’s ! 
i collection), in which the second segment of the female abdomen is ! 
i broader than that of the male, only a little longer than the third 
and its distal end as broad as base or distal end of that segment. 
That Macquart (Diptéres Exotiques, II, 2, p. 14, tab. 3, fig. 1), 
4 when drawing up the generic characters, had before him a male, 
and not a female as is stated, is unmistakably shown from his des- 
cription of the fifth abdominal segment: ‘cinqui¢me court et arrondi 
a l’extrémite.”’ 
PREVIOUSLY DESCRIBED SPECIES. 
M. conopsoides Macquart, Dipteres Exotiques, II, 2, p. 14, tab. 3, 
fig. 1 (Extraits des Mémoires...de Lille, 1841);—Rio de 
| Janeiro. Type of the genus. About the sex see remarks 
i above.-—— Williston, Diptera Brasiliana, Trans. Amer. Entom. 
| SOG OV; hi 57: 
| * M. mexicanus Macquart, Dipt. Exot., 18 Suppl.) p.123) tab. 10, 
fig. 15 (Extr. des. Mém...de Lille, 1844) — Mexico, female. 
Williston, Biol! Centr: Amer) Dip Vol Th Deen rson, 
Omilteme in Guerrero 8,000 feet, Chilpancingo 4,600 
feet (H. H. Smith). Two male specimens (Dr.. Williston’s 
collection), bearing the labels Omilteme, Guerrero, 8,000 
ft., July; H. H. Smith, differ so greatly from Macquart’s des- 
cription and figure, that they would be considered a different 
species, were it safe to rely upon Macquart. Antenne not 
longer than front and vertex together (Macq. fig. with much 
elongated); face with a large, oblong, blackish brown spot 
from base of antenne to oral margin; front and vertex black, 
