HEMIPTERA. 203 



of different species of Cratccgus. The infested leaves have a brown 

 and sunburnt appearance. All stages were found together. The 

 adult is represented much enlarged by Fig. 171. In Fig. 172 the 

 eggs and immature form are shown. The eggs are 

 smooth, whitish, glistening, semitransparent, and 

 ovoid in shape. Their average length is 3 mm. 

 (p. 1 2 in. . They are deposited on their broad end, 

 and seem to be somewhat inserted into the sub- 

 stance of the leaf ; they are covered completely 

 brown, sticky substance, which hardens soon 

 after oviposition. It adheres so firmly to the egg, 

 especially to the upper portion, that it is impos- 

 sible to remove it without crushing the egg. _ 

 At its upper end this covering of the egg is squarely nymph of Coryi 



, rt 



trun ing the whole mass the appearance * 8 ull ) 0r ' Re P rt for 



of a frustum of a cone with a porous lid. From 



the funnel-shaped summit the young insect makes its r \it. The eggs 



are usually laid, in groups of from ten to thirty, along both 



some prominent leaf vein. They bear a much greater resemblance 



to certain forms of fungi, notably the genus Phoma, and to certain 



young Homopterous galls, than they do to eggs of any sort. 



The immature insect is of the same dirty brown color u the sub- 

 stance covering the egg, and but little darker than the withering 

 leaf. It is of a broad, flat, oval shape, and spines seem to 

 from almost every portion of its body. It looks under the micro- 

 scope more like a lobe of prickly cactus than anything cF 

 think of. The cast-off skins stick to the leaf, and give it the apj 

 ance of being much more seriously infested than it realK 



The dead leaves under the bushes during the winter have 

 often found to contain the living and healthy eggs of the Tin 

 but the customary method of hibernation is in the adult ->ne. 



This form can be found during the winter under the loose bark of 



and in id stones on the ground. 1 



can be destroy' kaline \\ashes or by kerosene emul- 



sions. Hut it is probable that if the leaves and rubbish un< 

 the fall or every spring, a i. 



for remedies will not arise. 



Sub-Family II. Pi I 



This division includes a single aberrant genus. Inch 



but few spc- known. Here the scutellum is not i the 



