the tO]) of the ch)me, so that the jdws are opposite the upper side, 

 lience when it eats its way out of the shell, the more or less bean- 

 shaped ojiening is on one side rather high up, near the summit. 



FiiUy-fcJ larva. — In Maine, at Brunswick, the caterpillar oc- 

 curred fully {^(X on the beech and also on the hornbeam, during 

 the first week in September. 



This species is of the color of a dry, sere leaf, with no green 

 upon the body, and is thus readdy separated from .V. ipoiiiac; 

 besides the body is thicker; it bears a striking resemblance to a 

 part of a dead leaf, and several leaves were noticed with portions 

 partly cut off and somewhat curled up, to which the catarpillars 

 bore a striking resemblance, both in shape and color. 



It was observed that the high dorsal tubercle on the first 

 abdominal segment is both nutant and slightly retractile, being 

 invaginated when irritated. 



The larvx also occurretl at Providence, R. I., through 

 September on the chestnut. 



It is also figured in Ms. bv Major Leconte as living in 

 Cleorgia. 



For descriptions of stages II and 111 drawn up from alcoholic 

 specimens, see my ]:)ai)er in i'roc. Boston Soc. Nat. Hist., Vol. 

 ■^>^iv, P- 539, 1890. 



I-ength, 25-30 mm. The body is compressed as usual. The 

 head is somewhat notched above, large and high, compressed, 

 clay-yellow, with two broad dark bands in front, which are made 

 up of irregular wavy dark lines and spots. The labrum is carneous. 

 A pair of minute piliferous tubercles on the back of the 3d thoracic 

 segment. On the ist abdominal is a large high fleshy cylindrical 

 nutant tubercle of the same yellowish ct)lor as the body; it nods 

 back and forth freely as the creature walks; it bears a pair of 

 cylindrical chitinous piliferous tubercles with bases rather wide 

 apart, and which are i-eddish l)lack at base, and pale at the tips. 

 ( )n the 5th abdominal segment is a large broad fleshy hump, con- 

 colorous with the bodv, from which arise two low conical nutant 

 fleshy tubercles, each bearing a low chitinous i)iliferous tubercle. 

 (This hum]) with its tubercles are not tleveloped in .V. i/iiironiis). 

 'J"he 8th abdominal segment is provided with a prominent narrow 

 fleshy hump bearing two small piliferous warts. The anal legs are 

 about one-half as thick as the niidtUe abdominal legs. 



The body is uniformlv the color of pale unburnt or Phila- 

 delphia brick, or of the same tint as a sere, pale brown leaf, 'wif/i 

 no i^rccii upon it. There is a broad dorsal tlark brown strij^e along 



