272 Mr. C. H. T. Townsend on Diptera 
This new species certainly differs from B. spinosa, Simon, 
the type, and hitherto the only known representative of the 
genus, at least in having the legs strongly rufescent. B. spt- 
nosa (Ann. Soc. Ent. France, 1880, p. 400) was obtained 
near Alexandria. It must be added that Simon gives as a 
character for his genus the fact that the tarsi of the fourth leg 
are bisegmented. I cannot, however, distinguish two joints 
on these tarsi in my specimen. 
XXVI.—Oontributions from the New Mexico Biological Sta- 
tion.—No. II. (continued). On a Collection of Diptera 
from the Lowlands of the Rio Nautla, in the State of Vera 
Cruz. II. By C. H. Tyter Townsenp, F.H.S. 
[Continued from p. 33. ] 
TRICHOPODA. 
At least eight species of T'richopoda were secured by me, 
one of which has already been described in Section I. 
(7. tegulata, Towns., No. 15). In separating these forms, 
it was discovered that the males, especially in the smaller 
species, frequently have the tips of the foot-claws broken off, 
some specimens not having a single claw-tip remaining. 
But they are always broken evenly and at a uniform length, 
so that the specimens present the appearance of being a 
distinct form with peculiar claws. Such is, of course, not 
the case. An examination shows that the male claws become 
abruptly more slender just before the black hook-like tips, 
and it is at this point that they break, leaving a straight 
yellow claw perfectly blunt at the tip. These injuries are 
perhaps received in pairing. 
It should be mentioned that in most Trichopodas the 
female claws are quite evenly curved and not greatly elongate, 
with a hook-like curve at extreme tip, and yellow with tips 
rather widely black. In the male the claws are elongated, 
almost straight, less conspicuously black at tips, which are 
abruptly bent hook-lke at extreme ends. The leverage of 
the claws on the bent tips causes the fracture of the latter. 
T. phasiana, sp. n., 1s a notable exception in colour of claws, 
which are black, while the form of the claws is the same as 
above described. In 7’. histrio, on the other hand, the claws 
are not so elongate, yet nearly straight, while their coloration 
agrees with that of the other species of the genus. 
The yellow colouring of the wings, which I had previously 
considered to be a distinctive sexual character in the male, I 
