592 The American Naturalist. [July, 
median lobes as in viridis ; lobes and other plates as 
in thee very nearly. The following table of the grouped 
` ventral glands in Parlatoria may be useful :— 
euonymi thee viridis calianthina pergandu 
caudolaterals, 12-18 7 16-17 19 4-10 
cephalolaterals, 21-23 20 9-16 16 4-10 
median. none 1 41-4 4 none 
In P. calianthina Berlese, the median lobes are only 
notched without; in euvonymi they are very strongly 
and about equally notched on each side, and pergandiu 
has them nearly the same. 
(15). Aspidiotus juglans-regix v. albus Ckll.—In fair quantity on 
an osage orange bush (Maclura) in Mesilla, March, 1897. 
Some showed parasite holes. The food plant is new. 
(16). Chionaspis citri Comst.—On oranges from Samoa; found 
by Mr. Craw. A new locality, until reported last year 
by Mr. Craw. It was earlier known from Tonga. 
(17). Chionaspis braziliensis Sign—On a fern (seems to be a 
Polypodium) in a California green-house, largely para- 
sitized ; mostly 3 scales. Sent by Mr. Craw. A new 
locality. It is probable that brazilensis, aspidistre and 
latus are varieties of one species. These, with C. minor, 
form a distinct subgenus, in which the females resem- 
ble Pinnaspis, while the ¢ scales are those of Chionas- 
pis. It may be termed Hemichionaspis, with C. aspidis- 
tre as the type. 
THE SEVENTH SESSION OF THE INTERNATIONAL 
GEOLOGICAL CONGRESS. ioe 
(4TH CIRCULAR). 
Russra, 1897. 
As we have had the honor of announcing in our third circular 
addressed to all the members of the Congress, the number o 
participantsin the excursions of the Ural, of Esthonia, and of 
the Volga has been necessarily limited. The committee of 
organization has found itself obliged to adopt this measure as 
