246 SMITHSONIAN MISCELLANEOUS COLLECTIONS [voL. 48 
Giles.' As Mr. Theobald does not use the same terminology for the 
tarsal segments it will be seen that the species Theobald describes 
as ferox is distinct from that of Wiedemann. In Theobald’s ferox 
the female has the second and third tarsal segments white on the 
front and middle legs, the fourth and fifth in the hind legs. In the 
male the fore tarsi are black, the hind tarsi with the fourth and fifth 
segments white, the middle tarsi missing. Although both of Wiede- 
mann’s males and the one described by Theobald; each had the tarsi 
of one pair of legs gone, careful comparison shows that the tarsal 
markings were different in all of them. There is some doubt about 
the fore and middle tarsi of the female of Theobald’s form, for in the 
first diagnosis of the species the middle tarsi are omitted while in 
the full description which follows the front tarsi remain unmen- 
tioned. Theobald’s species is obviously distinct and we propose for 
it the name theobaldi. Culex ferox Wiedemann is preoccupied by 
the earlier unrecognized Culex ferox von Humboldt” and we pro- 
pose for Wiedemann’s two forms the names (no. 2) ambiguus and 
(no. 1) wredemann. 
Williston’s Megarrhina grandiosa,* based upon a female from 
Omilteme in the state of Guerrero in Mexico, appears to have all the 
tarsi marked with white but the white is much more extensive than 
in any other species. In the fore legs the tip of the first and all of 
the succeeding segments are white, the middle tarsi were apparently 
missing, and in the hind legs the tip of the third, the fourth and the 
fifth segments are white. 
Megarhinus longipes, Theobald,‘ from Mexico, is based on a single 
female. In the tarsal markings it appears to come very near M. 
rutila Coq., but the description shows that it differs in many points. 
The tip of the abdomen is yellow, the ventral surface apparently all 
golden-scaled. The predominating colors appear to be olive green 
and yellow shades. 
None of the species mentioned so far show a pronounced caudal 
tuft. In the male of septentrionalis there is a faint approach towards 
it. The lateral hairs are slightly longer and coarser on the sixth 
and particularly on the seventh segments than on the preceding ones. 
The M. purpureus of Theobald,’ afterwards referred by him to 
the violaceus of Wiedemann,’ also has at least some of the tarsi of 
Monogr. Culic., v. I, pp. 237-239 (1901). 
* Voyage aux regions équin. du nouv. Continent, vu, p. 340 (1819). 
3 Biologia Centrali Americana, Diptera, v. I, p. 224 (1900). 
4Mon. Culic., v. 1, pp. 241-242 (1901). 
5 Mon. Culic., v. I, pp. 230-231. 
SPC te Saeki 
