. Bulletin of the Department of Agriculture. Agriculture. THE CITRUS THRIPS. 27 reason it does not attack the citrus thrips, although the close asso- ciation of this thrips with the bean thrips on orange trees seems to be a good reason why it should do so, and it is quite possible, seem- ingly, that the citrus thrips may in the future become one of its hosts. SPIDERS. A large number of spiders, representing three or four families, capture the citrus thrips as a part of their food. The most im- portant of these in the matter of destroying citrus thrips is a small gray spider belonging to t
. Bulletin of the Department of Agriculture. Agriculture. THE CITRUS THRIPS. 27 reason it does not attack the citrus thrips, although the close asso- ciation of this thrips with the bean thrips on orange trees seems to be a good reason why it should do so, and it is quite possible, seem- ingly, that the citrus thrips may in the future become one of its hosts. SPIDERS. A large number of spiders, representing three or four families, capture the citrus thrips as a part of their food. The most im- portant of these in the matter of destroying citrus thrips is a small gray spider belonging to the family Dictynidae, genus The Dictynidae are tubeweavers, and this particular species commonly spins a thin sheet of web irregularly across an orange leaf, in a single one of which adult and larval citrus thrips have often been counted to the number of 50 or more. It is rare to find a web of one of these young spiders with less than from 5 to 10 thrips entangled in its meshes. The little spiders have several times been seen with the thrips in their jaws. The second most important Arachnid enemy of the citrus thrips is one of the jumping spiders (Fam. Salticidae), known as Thiodina puerperis. This spider is very w\,lch'preys upon cat fashion. From 4 to 10 or more upon the citrus thrips. thrips will be eaten in succession by one of n§ina â ) these young spiders. The spider drains the juice from the body of its victim and casts the skeleton aside. Another spider (fig. 9), belonging to the genus Misumessus, has often been taken in its immature stages with the citrus thrips in its possession. This spider is a yellowish, very active creature belong- ing to the family of so-called crab spiders (Thomisidae). It is com- monly found, solitary, upon orange leaves. It does not spin a web. A small black spider (Erigone sp.), less common on orange trees than any of the foregoing, is sometimes seen with adult citrus thrips in its possession. As is the case with all the forego
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