176 INSECTS INJURIOUS TO THE PLUM. 



No. 89. The Waved Lagoa. 



Lagoa crispata Packard. 



The larva of this species is nearly oval, about three-fourths 

 of an inch long, covered above with brownish, evenly-shorn 

 hairs, which are raised to a ridge along the middle of the 

 back, and sloped off on each side like the roof of a house. 



It reaches maturity during September, when it makes a 

 tough, oval cocoon, fastened to the side of a twig of the plum- 

 tree on which it has been feeding, and within this changes to 

 a brown chrysalis. The following July the top of the case 

 is opened by the lifting of a flat, circular lid, and from it 

 escapes a pretty moth. 



The moth is of a straw-yellow or yellowish-cream color, 

 the fore wings more or less dusky on the outer margin, and 

 covered with fine, flattened, curled hairs, arranged in regular 

 waves, running from near the base to the tip. The wings, 

 when expanded, measure about one and three-quarter inches 

 across. The body and legs are thick and woolly, and at the 

 tip of the abdomen there is a tuft of long, soft hairs, forming 

 a bushy tail. It is common in the South and West, but is 

 not often found in the North ; being a comparatively rare in- 

 sect, it is never likely to give much trouble to the fruit-grower. 

 It is found also feeding on the leaves of the apple and black- 

 berry. 



Xo. 90. The Streaked Thecla. 



Theda strigosa Harris. 



This is a very rare insect, a small butterfly which has never 

 been known to inflict any material damage, but, since its larva 

 has been found feeding on the leaves of the plum-tree, it is 

 deserving of mention. 



The caterpillar, when full grown, is half an inch or more 

 in length, of a rich velvety green color, with a tinge of yellow ; 

 there is a stripe of a darker shade down the back, with a faint, 

 broken, yellowish line along the middle. The upper part of 



