JAMES S. MINE 
293 
I collected nielanopterus near Puerto Barrios, Guatemala and 
found the species very persistent in following me, as is common 
with various species of Chrysops, and taking every opportunity 
to bite that offered. 
Stibasoma flavistigma Hine 
1912. Stibasoma flavistigma Hine, Ohio Nat. xii, .510. 
One specmien taken at Guacimo, June 6, 1909. The type of 
this species was taken at Vera Cruz, Mexico. These two speci- 
mens are all that I have seen and, so far as I know, all that have 
been reported. A rather wide range is indicated by the capture 
of a specunen so far from the type locality. 
Dichelacera grandis Ricardo 
Three female specimens taken at Juan Vinas, July 27 and 30, 
and August 3, 1909. Miss Ricardo described grandis in Annals 
and Magazine of Natural History, Series 7, Volume xiv, page 
371, from spechnens taken at Belize, British Honduras. These 
specimens vary slightly from the description of the type, but m 
general they agree well. Dr. Adolpho Lutz recently described 
D. submarginata from Brazil and his species is somewhat like 
grandis, but a comparison of specimens with the colored figure 
which he gives reveals a number of specific differences. Miss 
Ricardo compares grandis with cervicornis and points out that 
the two are different in the form of the wing bands. There is 
some mdication, however, that they have been confused by pre- 
vious writers and from this standpoint there is some doubt 
whether cervicornis is a North American species at all, although 
Miss Ricardo records it from David, Panama in the same paper 
in which she describes grandis. 
If we admit cervicornis to the North American fauna, from the 
records, we have five species which may be separated by the 
following table: 
1. General color of the body dark, nearly black 2 
General color of the body yellow 3 
2. Thorax yellowish gray pollinose with a shining black crossband. 
scapularis Macquart 
Thorax black wdth two golden pilose spots on the anterior half. 
pulchra ^^'illiston 
3. Smaller species, apex and inner border of the wing nearly uniformly infus- 
cated marginata Macquart 
Large species, wings in large part yellowish hyaline 4 
TRANS. AM. ENT. SOC., XLIII. 
