1910] Melander — The Genus Tachydromia 55 
In structure, venation, and general appearance this species resem- 
bles annulimana Meigen, of the European fauna; which however has 
striped femora, incrassate front tibiae, an erect hypopygium, some 
dorsocentral bristles in front of the scutellum, and moreover lacks the 
white pruinose spots beneath the humeri. 
Tachydromia schwarzii var. diversipes var. nov. 
Melander, Trans. Am. Ent. Soc. xxviii. 225 (1902). TJ. schwarzii, var. 
Male. Similar to schwarzii in all structural characters, but differing in 
coloration. The base of the legs is lighter, the outer portions blacker than in 
typical form, thus making a greater contrast in color. The coxae, trochanters, 
base of all the femora, the basal two-thirds of the front tibiae, and the tarsi 
except the tip almost white in color. The outer third of the front tibiae is 
abruptly black; the four posterior tibiae, except the knees, and the hind 
femora except the base, black. The palpi are blackish. The cross-bands of 
the wings are lead-gray, and are darker than is usually the case with schwarzit, 
where they generally have a brownish tinge. 
Two males which I captured at Dry Creek, near Austin, Texas, 
April 20, 1901. ‘The specimens were running over rather large stones 
in this moist ravine at the base of Mount Barker. 
Tachydromia ciliata sp. nov. 
Wheeler and Melander, Biologia Cent. Am., Dipt. Suppl. 375 (1901) 
schwarzit. 
Female. Length about 2mm. Quite similar to schwarzi in general appear- 
ance, but differing in the structure of the wings. Shining black, legs clear 
yellow except the infuscated outer two-thirds of the hind femora and tibiae. 
Antennae yellow; as they are defective nothing can be stated about the 
arista. Front narrow, facets of the eyes uniform. Palpi whitish. Occiput 
and thorax shining black, the propleurae not pruinose: humeri large and 
deeply constricted: the inner pair of scutellar bristles moderately long. First 
ventral segment white or whitish. Halteres yellow. Wings comparatively 
short and broad, blunt at the end, and margined with a conspicuous fringe 
of hairs which are prominent even on the costa; two brown cross-bands are 
present as in schwarzii, but because of the shortened wings the outer fascia 
appears less extensive; the third and fourth veins more distant from each 
other and continuing to the wing-tip without converging (in schwarzii they 
lie closer together and converge towards the tip). 
I have two specimens before me from Guerrero, Mexico, one taken at 
Chilpancingo, at 4600 feet altitude, the other labeled Sierra de las 
Aguas Escondidas, 9500 feet. There are some minor differences 
between the two specimens. ‘The former measures 1.75 mm. and has 
