126 Journal New York Entomological Society. [Voi. xi. 



what was at the time of disturbing, a measurement of one larva in the 

 first stage of .53 mm. and of one in the third of 1.32 mm. The 2.31 

 of the sixth stage as against 2.57 mm. was also suspicious, but as it 

 had been carefully taken and was the average of a number but slightly 

 varying, there can be no question as to its correctness. The calcu- 

 lated series for the second set of observations would be (ratio .80) 

 .74, .94, 1. 16, 1.48, 1.85 and 2.31 which contains most of the ob- 

 served stages : and for the first .54, .68, .85, 1.06, 1.32, 1.65, 2.06 

 and 2.57. In neither of these does the observed fifth stage (2.20) 

 find a place : but all of the others, including the abnormal measure- 

 ments, appear in one or the other of the series. 



Markings. — The development of the markings also shows a close 

 correspondence, although through the absence of the divided first stage 

 their derivation was not as clear to the first investigators. 



The .53 mm. stage shows no markings whatever : the first stage 

 (.68 mm.) a faint, claret-colored transverse shade on the ist, 3d, 

 5th, 7th, 8th and 9th abdominal segments extending across the dorsum 

 to tubercle iii on each side. In the supplementary stage the subdor- 

 sal line (sometimes interrupted) appears widening on each segment to 

 reach tubercle iii and on the 2d thoracic, to surround tubercle i. 

 The transverse dorsal shades have now on abdominal segments i, 3, 

 5, 8 and 9 become distinct and broad and extend ventrally on seg- 

 ments I, 7 and 8(7, however, has become clear dorsally) to beyond 

 the as yet undeveloped tubercle vi. In the second stage, the dorsal 

 line appears indicated by spots, always on the thoracic segments and 

 interruptedly on the abdominal. Traces of the infraspiracular line 

 are also apparent. In the third stage, the infraspiracular line is more 

 clearly marked and a supraspiracular line is developed by the restric- 

 tion and breaking up of the transverse bands. The fouth stage shows 

 all lines well marked — dorsal, addorsal, subdorsal, supraspiracular, in- 

 fraspiracular and subventral. In later stages, there is a gradual broad- 

 ening and fusion of the lines so that in some individuals the markings 

 appear yellowish green on a dark ground instead of the reverse. The 

 greenish-yellow ground color appears to exist in the fat body : the 

 claret-colored markings are cuticular. 



Wart Formation. — Is that of the typical noctuina pattern, large in 

 first stage, later much reduced ; setre are simple. Tubercle vi want- 

 ing through the .73 mm. stage. Secondary setae appear in the second 

 stage, one above and one below tubercle iii and caudad to it. 



