48 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 17 
nant water in open country. The other two were taken from mud at 
the edge of stagnant pools in woods. Since the greater part of our 
search for tabanid larvae has been confined to wooded areas it appears 
that pools in more or less open areas are the preferred breeding places of 
this species. All larvae were collected on various dates during Decem¬ 
ber, 1922, and January, 1923. Adults appeared between April 28 and 
May 15, 1923; 16 of them being males and 8 females. Observations 
made indicated that the length of the pupal stage varied from 10 to 16 
days. 
Tabanus melanocerus Wd. A single larva was collected at Magnolia 
on September 12, 1922, from the slimy mud at the edge of a swift 
flowing stream, the height of which varies considerably during the year. 
A wide sand bar formed the bank of the river at the point where the 
larva was found and this bar was free of vegetation. The finding of the 
larva in such a situation does not, of course, necessarily indicate that 
this is a natural breeding place for the species, since the larva may have 
been washed down from a point higher up. 
The larva did not feed between the end of January and the first of 
April and no food was taken after May 1. The pupa was found on 
May 21 and an adult male issued on June 1. 
Tabanus mexicanus L. Larvae were found in mud at the edge of 
stagnant water in a brook bed and in a hole formed by an uprooted 
tree in wooded areas in East Baton Rouge Parish during September 
and December, 1922. Five larvae were received on September 24, 1922, 
from Mr. G. H. Bradley of the U. S. Bureau of Entomology, who is 
stationed at Mound, La., where the Bureau maintains a laboratory for 
investigations having to do with mosquitoes. Mr. Bradley’s note in 
regard to the finding of these larvae is as follows:—“Five small larvae 
taken on surface of lake station 56A. Location; shady. Water 2 to 
24 inches deep. Surface; covered more or less with duckweed. Margin; 
bare of grass, soft, and covered with decaying vegetation. Bottom; 
muddy, very soft.” Adults issued on various dates from the middle of 
May to the first of August, the length of the pupal stage ranging from 9 
to 16 days. A single larva, apparently of mexicanus , was still alive and 
in good condition on December 1, 1923. 
Tabanus venustus O. S. A single larva was collected from mud at the 
edge of a small brook on March 14, 1923, in East Baton Rouge Parish. 
At the time the larva was found the brook, which at this point flows 
between high, steep banks through an open, rolling field, was about one 
foot in width and very shallow. There was a growth of small water 
