PAPILIO. 



Prgan of tl^e ]^ew Jork pntomological piub. 



Vol. 2.] September, 1882. [No. 7. 



NOTES ON PIERIS MENAPIA.— Felder. 



By R. H. Stretch. 



While in company with Professor Hagen and Mr. Samuel 

 Henshaw, of the North Transcontinental Survey, during the 

 present summer, it was my fortune to find this delicate butterfly 

 in excessive profusion, and as it must now take rank among our 

 injurious insects, it is thought that the following notes may be 

 worthy of publication. 



Distribution. — The species was first seen by our party at 

 Spokane Falls, in Washington Territory, near the Idaho line, on 

 July 22d, the altitude above the sea being about 1900 feet. The 

 few specimens captured were all males and much worn. A num- 

 ber of others were seen, but their peculiar habit of flitting around 

 the tops of the larger trees prevented capture. On July 23d, I 

 found the larvae and pupae in great numbers on the trunk of a 

 yellow pine, at a point on the Colville road, about ten miles 

 north of the crossing of the Little Spokane River, and about ten 

 miles south of Loon Lake, but did not notice the insect on the 

 wing. At Loon Lake a few worn specimens were seen (all males), 

 and I again found the larvae and pupae on the trunks of pine 

 trees in immense numbers, say not less than from 200 to 300 

 within six feet of the ground. Between Loon Lake and Brown's, 

 the latter place being fifty-four miles from Spokane Falls, the 

 same phenomena were again noticed, but with the difference that 

 the imago was emerging in great numbers. I took probably 

 seventy specimens, both $ and ?, in a few minutes, and over one 

 hundred and fifty in the course of the day. It would easily have 

 been possible to make the number 1500. Most of those taken 

 were picked off the trunks of the trees, just fresh from the pupa, 

 having never been on the wing. At Brown's both larvae, pupae 

 and imago were equally common, though not many of the latter 

 were on the wing until towards evening, as the day was cloudy. 

 Towards evening the sun shone out for a few minutes, and in- 



