278 Mr. C. H. T. Townsend on Diptera 
the abdomen beneath the tergum. Therefore I feel quite 
safe in referring these specimens to dnconstans, since the 
peculiar characters of the wings and thorax agree so well 
with the description. As a variety it differs from the typical 
formosa not only in the characters of aurantiaca, but further 
by the postsutural golden markings of the mesoscutum. 
38. Trichopoda lanipes, var. tropicalis, var. n. 
One female, San Rafael, June 28. On flowers of the 
Cordia sp. 
Length 133 millim. 
This is a large form of lanipes. Fabricius’s and Wiede- 
mann’s specimens measured about 9 millim. TI have seen 
specimens of the smaller form, here considered to be the 
typical danipes, which were only a little larger than normal 
specimens of pennzpes. ‘The present specimen has the deep 
golden pollen of sides of front clear and pronounced, being 
pointed-triangular in shape, filling out the space between 
frontal vitta and eye-margins anteriorly, and continued indis- 
tinctly backward along orbits nearly as far as vertex. ‘The 
lines of thorax are distinctly golden, though inclining to 
whitish. Abdomen has a uniform bluish cast, apparently 
from a very thin covering of silvery pollen over the black 
ground-colour, but is nevertheless shining. Femora are 
yellowish red at base. Palpi brownish yellow. Otherwise the 
specimen agrees perfectly with the descriptions of Fabricius 
and Wiedemann. It shows some short cilia on upper and 
lower edge of hind femora apically. 
The characters belonging to this variety are, in the main, 
its greater size, combined with the lighter palpi and bases of 
femora, and the femoral cilia. It is doubtless a tropical 
variety of the smaller typical form, which was from Carolina. 
I have seen other large specimens, from Mexico and South 
America, apparently belonging to this variety. 
T. plumipes, Fabr., is doubtless to be considered another 
variety of danepes, differing principally in the rust-colouring 
of scutellum and femora. It is small like the typical lanipes. 
T. lanipes, presumably the typical form, has been recorded 
by Gigho-Tos (Ditt. Mess. iii. p. 6) from Cuautla (wrongly 
spelled with an m), which is in the State of Morelos. The 
specimen was collected by Saussure. In the same place, 
Giglio-Tos gives New Mexico as a locality for lanipes, 
referring to my paper, in which I gave no locality whatever, 
but merely remarked on the affinities of the species. He 
has similarly recorded pennipes from New Mexico, referring 
