Packard.] ■'■'**^ [March 17, 



The LiPE Histouy of Dryocamp.v p.ubicunda (Fabr.). 



Tlie unfertilized eggs laid in New York, July 15, were kindly sent rae 

 by Mr. James Angus, but they did not hatch. 



Egcf^ — Length, 1.4 mm. Oval, a little flattened ; the shell yellow, thin, 

 parchment-like, the surface smooth, polished, under a one-half inch objec- 

 tive showing no traces of pits or polygonal areas. The shell is so thin 

 that unfertilized eggs collapse irregularly. 



Larva Stage I and II. — The larva was found at Providence by Mr. 

 Bridgham about June 20. The following description is drawn up from 

 his excellent colored figures. He says it molts in a day after hatching, 

 and after the molt the larva is the same as before, except that the general 

 color of the body is a little darker, so that the following description will 

 provisionally apply to both stages. 



Length, 5 mm. The head is rather large, rounded, no wider than the 

 body, and deep black. The body is of the same width throughout to the 

 ninth abdominal segment. The prothoracic segment a little wider than the 

 rest of the body. From the second thoracic segment arises a pair of thick 

 large horn-like tubercles, which are about as long as the thickness of the 

 segment bearing them ; they are greenish at the base and black beyond ; 

 the end is blunt, not tapering at all, giving rise to a hair on each side of 

 the end. All the tubercles on the other segments are in the form of small, 

 simple acute spines of nearly uniform size, those on the prothoracic seg- 

 ment being of the same size as those behind the succeeding segment. There 

 are three rows of spines on each side of the body, and the dorsal ones are 

 no larger than those of the subdorsal and subspiraciilar series. On the 

 eighth abdominal segment there are two widely separate dorsil spines, 

 and two shorter ones on the ninth segment. The body is pale yellowish 

 green, with a median dorsal and a subdorsal dark-green stripe, also a dis- 

 tinct lateral ridge low down, from which the infraspiracular spines arise. 

 The next stage was drawn June 25, "after second molt." 



Stage J/(?). — Length, 7 mm. The head is now smaller in proportion 

 than before, but still black. The two horns are noic shorter than before in 

 proportion to the body, but otherwise the same ; the other spines are 

 slightly stouter. The six lines are noic reddish, as is the loioer (^infra- 

 spiracular) side of the body. 



Five caterpillars were found feeding side by side on the under side of a 

 red maple leaf, August 12, at Brunswick, Me. They do not start when 

 irritated or use their horns. 



Stage III (?). — Length, 8-9 mm. Head rounded, scarcely as wide as 

 the body, very dark chestnut to nearly black. Body cylindrical, not so 

 much flattened as in Anisota. On the first thoracic segment, which is 

 slightly narrower than the second, are two rounded black flattened coni- 

 cal tubercles, not piliferous, and two smaller flatter ones behind. Two 

 larger subtriangular subdorsal black tubercles give rise to three minute 

 short hairs. On the second thoracic segment are two long subdorsal black 



