INSECTS AFI-ECTINC; PARK ANU WOOULANU IKEES 



599 



avt-raijc length is .01 inch. They are depositeil on their broad end, and 

 seem to be somewhat inserted into the substance of the leaf; they are cov- 

 ered completely by a brown, sticky substance, which hardens 

 soon after oviposition. It adheres so firmly to the egg, 

 specially to the upper portion, that it is impossible to remove 

 , ^k=^Sl. it without crushing the egg. At its upper end this cover- 



ing of the egg is scjuarely truncate, giving the whole mass the 

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

 the funni'l-shaped summit the young insect makes its exit, 

 '- and the round hole at this point renders the empty eggs 

 readily distinguishable from those still unhatched. 'ilie 

 fik. .54 corythuca ^^ ^^p usuallv laid, in crrouijs of from 10 to xo, along 



.ircu.it.i, eggs and ^&,-. J ' . " ' ^ . ,,,, i i 



youne (Afttr Cin- both sides of souie prominent leaf vem. 1 li< y 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 dirt\ brown color as 

 stance covering the egg, .inOi but little darker than the 

 withering leaf. It is of a broad, flat, oval shape, and 

 spines seem to project from almost every portion of its 

 body. It looks under the microscope more like a lobe of 

 a prickly cactus than anything else we can think of. The 

 cast-off skins stick to the leaf, and give it tlie ai)i)earance 

 of being much more seriously infested than it really is. 



The general appearance of a malurt- individual is well 

 shown in figure 155. It is about ]/% inch long. 



Professor Comstock states that llie species ordinarily 

 liibcrnates in the adult condition, and may bi- found during the winter 

 loose l)ark of a tree or under sticks or stont-s on the ground. 



the sub- 



Cory thuca 

 a re U.I I a, adult (.\ftrr 

 C-omslock) 



under 



tht 



Bibliography 

 1880 Comstock, J. H. ' V. s. Dep't .Vgri. . Rcp't 1S79, \>. 221-22 



Ciliated tingis 



Corythuca ciliata .Sa\' 



Very delicate retii iilate winged inset l.s, about '8 incii in lenjjth, mav he found on 

 the foliage of buttonvvood. 



This species was brought to the attention of Dr I.intner about i8cS8, 

 and was noticed briefly in his report. It was received by him from Prof. 



