Packard ] lUL) j-pelj 3^ 



creeping disk meet. On each side of tlie dorsal plateau is an alternating 

 row of impressed areas representing flattened and otherwise modified 

 warts, and on the sides are the spiracles, which are round and colored like 

 parchment. Below, alternating with the spiracles, is a row of minute 

 sunken warts, and above, also alternating with the spiracles, is a row of 

 ten oval or dumbbell-shaped pale spots, situated on a large subtriangular 

 impressed field. This field is seen under the microscope to be granulated, 

 while the surface of the body around them is singularly roughened with 

 minute raised, curved or new-moon-shaped granulations. 



Larva of Packardia elegans (Packard). 



The larvsE of this species frequently occurred on the leaves of the wild 

 cherry at Providence, in rather dense, dark pine woods near the banks of 

 the Seekonk river, during the last two weeks of September. The flexible 

 tongue-like tail, reminding one of that of Parasa fraterna, though not 

 perhaps homogenetic with that, is a good generic character, and it may be 

 an incipient deterrent movable organ serving to frighten away ichneu- 

 mons and tachinas. 



Fall-grown Laroa. — Length, 14 mm. ; breadth, 5.5 mm. This larva is 

 allied to that of Limacodes fasciola, but differs generically in the long 

 tail-like prolongation at the end of the body. The body is oval, but 

 longer and narrower than usual, and rather high, with a rather narrow 

 but well-marked median plateau-like surface bounded by well-marked, 

 distinctly scalloped ridges, which are stained whitish lemon-yellow. 

 From this plateau the sides of the body fall rapidly off ; the surface of 

 each lateral region or declivity is steep and somewhat hollowed, and 

 about twice as wide as the median plateau (in L. fasciola the plateau is 

 about as wide as one of the lateral regions). The sutures between the 

 segments are indistinct, not so well marked as in L. fasciola. Along the 

 middle of the plateau is a row of pale, whitish-green, rounded spots 

 which extend nearly to the whitish ridge, and are centred by a slightly 

 raised, dark-green spot. It does not form a tubercle or flattened wart. 

 On each side along the middle of the lateral region is a row of ten similar 

 spots, and farther down is a submarginal row of irregular subtriangular 

 lemon-yellow spots, each situated directly below the dark-green centre of 

 the whitish spots above. 



The sides of the body, viz., the margin above the creeping disk, are 

 slightly scalloped (the drawing well shows this), the points of the scallops 

 being under a high-power Tolles triplet seen to be well emphasized by 

 a minute piliferous tubercle, a little larger than the other granulations 

 which roughen the skin. 



The end of the median plateau is greatly prolonged into a long, tail- 

 like, flexible, fleshy, acutely conical granulated process which is stained 

 cherry-red above, the only red on the body. The end of the creeping 

 disk is provided with fine short hairs. 



