Jrom the Rio Nautla, State of Vera Cruz. 27 
Length 9 and 12 millim. 
I cannot separate these two specimens satisfactorily. The 
larger one has no whitish hair on front, while the other has 
the hair of front all whitish except at vertex. I cannot 
believe that these differences are of specific value in this case, 
though they may be considered varietal. Without more 
specimens of both forms, however, I hesitate to define the 
variety. The larger specimen also seems to differ in the 
wings being more distinctly dilute brownish at base. The 
third antennal joint in the larger one is a little longer and 
more abruptly narrowed on middle. 
The specimens differ but little from Williston’s description 
of chetophora (Syn. pp. 149-150, and Biol. C.-A., Dipt. iii. 
p- 52). I should call the third antennal joint somewhat 
emarginate. The antenne are brownish yellow, with most of 
third jot brown. ‘Two median vitte on thorax are con- 
spicuous by the hair being darker, subappressed, and directed 
backward, while the rest is white, suberect, and directed a 
little forward. Scutellum with coppery reflections; thorax 
with only blue, green, and purple reflections. Legs black. 
Abdomen bluish black; the anterior half of segments 3 to 5, 
above and below, with white pubescence, the posterior half 
with black. ‘This is even to be noticed on the sixth segment 
in the larger specimen. 
29. Volucella cordic, sp. n. 
Fourteen female specimens, San Rafael, June 30 to July 13. 
All on flowers of the Corda sp. 
Length 9 to 12 millim. 
Thorax behind with a prescutellar row of bristles. Wings 
fuscous brown on outer distal half, becoming dilute fuscous 
toward internal border extending to alula, yellowish on basal 
portion. Scutellum wholly clear brownish yellow, second 
abdominal segment same, except narrow hind border and 
wide median vitta ; rest of abdomen metallic purplish black, 
with blue, green, and violet reflections. In some specimens 
there is a faint yellow shade, more or less distinct, on anterior 
corners of third segment. Anterior half or less of fourth 
segment, anterior third or more of third segment, and anterior 
two-thirds of second segment with short white pubescence ; 
rest of abdomen with black pubescence. Venter with about 
same proportions of white and black hair, but longer, with 
hair of second segment nearly all white. Face and cheeks 
with well-developed stripes, but facial stripe usually narrower 
than that of cheeks. Legs black or brown, paler at knees 
and tips of tibie. Antenne pale brown ; third joint narrowed 
