76 OHIO STATE ACADEMY OF SCIENCE. 
of the second, third and fourth lobes respectively. Four groups of 
circumgenital gland orifices, each of about 7, but varying from 5—10. 
Remarks: This species infests Citrus trees in Florida, oe- 
curring in Ohio only under glass. Being so nearly the color of 
the bark, it is searcely noticeable until a tree is badly infested. 
Parlatoria zizyphus (luueas). 
Fig. 23. 
Coccus zizyphus Lucas, Ann. Soc. Ent. Fr., (3), i, xxviii. (1853). 
Parlatoria zizyphi Comst., 2nd Rep. Dep. Ent. Corn. Univ., p. 115 
(1885). 
Scale of female: The scale is almost covered by the very black 
exuviae, the first being oval and the second quadrangular. On the 
middle line is a ridge in a longitudinal depression. 
Scale of male: Long, parallel-sided, light-brown, terminal exuvia 
black. 
Female: Similar to female of P. pergandii, except that the three 
segments preceeding the last bear numerous irregularly incised plates, 
and the fourth lobe is long and sharp-pointed. The lobes are somewhat 
smaller than in P. pergandii. 
Remarks: This species is a native of Kurope, infesting 
orange and lemon trees, and is frequently seen on imported fruit 
in the markets. 
DIRECTIONS FOR COLLECTING AND MOUNTING COCCIDAE. 
A few words in regard to collecting Coeeidae might be fit- 
ting and helpful to beginners. Cocecidae are seldom found in this 
region on anything exeept trees and shrubs, although many her- 
baceous plants are infested by Aphids and Aleurodids. Perhaps 
the most satisfactory method in collecting scale insects in the 
field, is to put them in envelopes, properly labeled, until the 
collector ean procure suitable glass tubes or bottles, which should 
eontain all data upon a slip of paper. Until the material is per- 
feetly dry, a plug of cotton should be used; otherwise the contents 
will soon mould. inaliy: when you have collected as much of 
any species as you think necessary, collect as much more, it will 
never come amiss; in other words, always colleet plenty, if 
possible. 
If the speénmens to be mounted belong to the Diaspinae, eare- 
fully lift the seale revealing the small flat inset beneath, which 
