Bugs, Cicadas, Aphids, and Scale-insects 
219 
and feasible remedy in the case of thin-haired animals, as swine and horses, 
is the application of a wash of tobacco-water or dilute carbolic acid, or of 
an ointment made of one part sulphur to four parts lard, or kerosene in 
lard, or of a liberal dusting with wood ashes or powdered charcoal; in the 
case of thick-haired animals, as cattle, the best remedy is fumigation by 
enclosing the animal in a sac or tent with the head left free, and burning 
sulphur or tobacco inside the sack. One to two ounces of tobacco and 
exposure of twenty to thirty minutes for each cow have been found effective. 
A brief account of the curious little insects known as thrips may be 
appended here to the chapter on the Hemiptera (Fig. 307). These narrow- 
Fig. 306. Fig. 307. 
Fig. 306.—'The sheep-louse, Hamatopinus ovis, female and egg. (After Lugger; natural 
size of insect indicated by line; egg much enlarged.) 
Fig. 307.—Thrips, Phorithrips sp. (Much enlarged.) 
bodied, fringe-winged, yellowish or reddish brown or blackish little creatures 
can be most readily found in flower-cups, which they frequent for the sake 
of sucking the sap from the pistils and stamens or the delicate sepals 
and petals. Some of them move slowly when disturbed, but others run 
quickly or leap, and nearly all show an odd characteristic bending up o c 
the tip of the slender abdomen. This movement is usually preparatory 
to flight (in the case of winged individuals), and is believed to be the means 
of separating and combing out the fringes which border both fore and hind 
margins of each wing. There are fine spines on the sides of the abdomen, 
and the movement of the abdomen seems to draw the fringe-hairs through 
these comb-like rows of spines. The thrips vary in size from -g-L to -J- of 
an inch, and may be certainly known by their narrow fringed wings (when 
