P. Rau.
Notes on the Duration of the Pupal Stage in Certain Lepidoptera.
Psyche 20(5):161-162, 1913.

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19131 Rau-Notes on Duration of Pupal Stage in Certain Lepidoptera 161
posterior margin on each side of segments two and three, situated a short distance in from the lateral bands and extending far beyond the end of the body; others very small, occupying similar positions on segments four and five; these appear to be the only dorsal hairs. Genitalia with long, slender external appendages, not heavily chitinized.
Measurements :
0\ length 1.000 mm. Width
Head
,246 ,344
Prothroax 100 278
Metathroax 196 360
Abdomen 623 754
NOTES ON THE DURATION OF THE PUPAL STAGE IN CERTAIN LEPIDOPTERA.
BY PHIL RAW.
St. Louis, Mo.
1. Grapta interrogationes Fab.
The larvae of this insect were observed upon their food-plant,. the hop vine, from the time of pupation to the time of emergence as adults, covering the period from August 28 to September 21, 1910. The duration of the pupal period was as follows: Days. No. of insects.
9 1
10 6
11 2
12 0
13 2
We see that in these eleven individuals this period varied from 9 to 13 days, in most of them 10 days. Mr. W. H. Edwards1 finds that the duration of the pupal stage at Coalburgh, West Va., is from 7 to 11 days, a little shorter than at St. Louis. 2. Samifl cecropia Linn.
The notes on three insects of this species are as follows: Date of Date of
Sex. Duration.
pupating. Emerging.
c? 7/20/'10 6131'11 318 Days.
9 7/27/'10
6/5/'ll 313 "
Q 7/15/'ll 6/4/'12 324 "
1 Can. Ent. Vol. XV. p. 204.




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