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brown as the other leaves overlay them, and thus make the nest 

 more conspicuous. A small nest is shown, somewhat reduced 

 in size, in Fig. 10. The number of larvae which occupy these 

 nests varies greatly, some nests containing but 15 or 20 while 



others have nearly 100 larvae in them. 

 A full grown larva measures about 

 three-fourths of an inch in length. 

 The upper surface of the bod} 7 is 

 black, marked with four narrow, 

 parallel, white stripes ; the sides and 

 lower surface of the body are flesh 

 colored, marked by several narrow, 

 paler stripes. The head is light yel- 

 lowish brown in color, and on the 

 back of the segment next to the head, 

 is a dark brown shield. The tips of 

 I the mandibles or jaws, a shield on 

 f the back of the last segment of the 

 body, and a large spot on the upper 

 side of the last pair of pro-legs, are 

 black. The body, including the 

 head, is sparsely covered with short, 

 brownish hairs that arise from small, 

 black spots, which are quite conspic- 

 uous on the sides and ventral sur- 

 face of the body. Two pair of pro- 

 legs are present, borne by the 6th 

 and last abdominal segments. 



Most of the larvae reared in the 

 nsectary matured in September, left 

 the nest, and crawling under leaves 

 Fig. 10. — Nest of Hydria undu- on the surface of the soil or descend- 

 ed^ ing for a short distance into the soil, 

 made slight cocoons of particles of sand fastened together with 

 silken threads. Within these cocoons the larvae changed to pupae 

 in a few days. The pupa measures four- tenths of an inch in length 

 and twelve one-hundredths of an inch in width. It is of a glossy 

 chestnut-brown color, with the abdominal segments coarsely punc- 

 tured, and with the last segment extended into a slender two- 

 parted curved hook. The adult insects do not appear till the 

 following summer, generally during the latter part of July, al- 



