315 
tubercle is narrower than the internal ; in cox.e II both are of even width, and in 
coxa' III and IV the external one is broadest. Stigma, subtriangular, cancave with 
raised borders, external angle interrupted with a broad button-shaped lapel; peri- 
treme flat, comma-shaped, straight, orifice oval. 
Male: suborbicular ; length of body 6 mm ; length of capitulum 2 mm . 
Capitulum of the same color as in female; dorsum reddish-brown with metallic 
(green and gold) supra-marginal band and some figurations of the same color over 
the surface, underside bright yellow; legs as in female. 
Capitulum about as long as broad, with rounded posterior and lateral margins 
without projecting postero-lateral angles and without the ocelli-like impressions; 
maxillae, palpi, as in female, dorsum uniformly and finely punctured with some 
single larger punctures in the posterior region; lateral groove absent, posterior 
lobes distinct, clypeus, underside and coxse as in female. Stigma more subreni-forrn 
with a broad and long lapel on the external side. Coxaa I is provided also with a 
short round tubercle at the antero-internal region as in the female. 
Described from two specimens from Florida, one of which was found 
upon the Gopher at Orescent City. — [Marx.] 
My grateful acknowledgments are due to Mr. E. A. Schwarz, of 
Washington, for valuable assistance and suggestions in the prepara- 
tion of this paper. 
THE CONTROL OF PHYLLOXERA BY SUBMERSION. 
We have from time to time referred in these pages to the results 
which have been obtained in Europe, and notably in France, in con- 
trolling the Phylloxera by flooding the vineyards afc certain seasons of 
the year for definite periods, known as submergence, which has, of all 
the direct methods against this notable grape pest, proved most 
surely effective in its results, the sole objection to it being the expense 
attending it and the impossibility of applying it except in regions 
which are favorably situated. The submergence of vineyards for other 
than irrigation purposes did not originate with the invasion of the 
Phylloxera, for from time immemorial it has been the custom in south 
Russia and in Greece to inundate vineyards during winter torrid them 
of hibernating insects and snails. As a means against the Phylloxera 
it was first employed by Dr. Seigle, of Mmes, in July, 1868. A canal 
surrounding his property, leading from the Eiver Durance, was taken 
advantage of to inundate his vineyards for twelve consecutive days 
during July, and again for eight days in October of the same year, and 
in the following year three inundations were made, with the result that 
the Phylloxera was entirely exterminated. 
The practical outcome of the experiment resulted in the adoption of 
the method wherever feasible. All soils are not equally suited to this 
treatment — the best results obtaining in soils which the water will 
penetrate from one to five centimeters in twenty-four hours. If the 
soil is so loose and sandy that the water reaches a depth of eight to 
ten centimeters in this time, the amount of water required will be so 
great as to render submersion impracticable. 
