COCCIDAE OF OHIO. 17 



should be transferred to a drop of water upon a glass slide. 

 (Often under the scales of Chiouaspis will be found a great 

 quantity of eggs and the female shrunken into the very tip of 

 the scale.) After sufficient have been procured in this ^vay, it 

 is an easy matter with a medicine dropper and a strong solution 

 of KOII (Potassium hydroxide) to rvni otf the specimens into a 

 test tube, in which they should be boiled until clear and trans- 

 parent, (sometimes it is necessary to prick a hole in the specimens 

 to alJow the body contents to escape.) Before the KOH solution 

 cools, the cleared specimens should be run through 50 per cent, 

 and 100 per cent, alcohol. Now they can be put on a slide in 

 proper mounting position, and the excess of alcohol can be taken 

 up with strips of blotting paper. Allow the alcohol to evaporate 

 and then put on several drops of Xylol; after a few moments 

 the Xylol may be removed and the specimens are ready for 

 mounting in the usual manner, in Canada balsam. 



If the specimens are of the nature of Lecaniums or "Mealy 

 Bugs/' i. e. not separable from the scale, the entire insect must 

 be prepared and mounted in the foregoing manner. 



Complete data as follows should be given on proper labels : — 

 scientific name, host, locality, date, other interesting notes and the 

 collector's name. 



INDEX TO GENERA 



ALSO A FEW COMMON NAMES OF ECONOMIC SPECIES. 



Page Page 



Aspidiotus 55 Lepidosaphes 73 



Asterolecanium 33 Mealy-Bugs 41 



Aulacaspis 53 Mytitaspis 73 



Chionaspis 43 Orthezia 31 



Chrysomphalus G9 Parlatoria 75 



Comstockiella G9 Phenacoccus 39 



Bact.yiopius 41 Pseudococcus 41 



Diaspis 51 Scale, Curtis' 64 



Briococcus 38 Scale, Forbes' 60 



Fiorinla 54 Scale, Oyster-shell 74 



Gossyparla 38 Scale, Putnam's 57 



Hemichionaspis 53 Scale, Rose 53 



Howardia 51 Scale, San Jose 65 



Kermes 33 Scale, Scurfy 46 



