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Psyche 2:210, 1877.

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for valerianic acid in the usual way with neutralized soda-solu- tion upon sesquichloride of iron, no red precipitate of valerian- ate of iron was formed, nor have I obtained a bluish-white opalescent liquid of butyrate of copper on adding acetate of copper. Uric acid was also found to be absent, on treating with nitric acid and ammonia in the usual way ; neither could I detect formic or acetic acid, nor did boiling with caustic soda 1ibar.ite ammiilia. A few drops of the secretion, put on a piece of dry caustic soda, turned at first dark green, became in a few seconds dirty brown, and cleared up to a brownish red after several hours. So far I am not aware of the constituents of the secretion, and, on sending some of it to Prof. Chandler, asking his kind advice, I was told that a payment of sixty to seventy-five dollars, in advance, would be necessary to have an accurate analysis made.
The secretion was gathered gradually, by holding live speci- mens into a test-tube containing 10 grams of dry caustic soda. About 60 drops have accumulated during a period of three months. Carl F. Gissler.
Attacks of Native Insects upon Imported Trees. It is often stated that foreign trees, and othe'r plants imported into a country, are not attacked by the insects peculiar to the new surroundings. The presumed immunity is even quoted as an advantage in the we of such trees for forest trees. But the immunity is apparently only presumed, at least for plants and trees after their entire acclimatization. When I was a boy I saw extensive plantations of Pinus stratus and of Robinia pseudacacia, which grew excellently and seemed not to be at- tacked by native insects. This was between 1824 and 1830. Later, things have changed considerably; nevertheless Ratze- burg contends that at least deciduous trees are attacked less (as lie states it to be a common fact) than pine trees. There-
fore exotic oaks near by indigenous ones infested by Chrysomela and Tenthredo are attacked less. The Pinus strobus accord- ing to Noerdlinger, is attacked even more than European pine, being damaged together by Scolytus polygraphus, 8. piniperda,



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8. vdlosm, and 8. pityographus, which never occur in Euro- pean pines.
Perhaps it will be of some interest to know what insects have until now been observed to injure, in Germany, Pinus strobus and Bobinia pseudacacia.
PINUS STRO BUS.
Scolytus bidens var. quadridem, S. auto- graphus, s. Zichtensteinii, s. pityographus, s. polygrapJius, s. villosus, S. piniperda,
Cryphalus abietis, Xyloterus lineatus,
Pissodes pini, P. notatus, Leptura rubrotestacea, Lyda erythro- cephala, Chermes corticalis. Coleoptera 12, Hymenoptera 1, Heniiptera 1.
ROBINI A PS EUDACACI A. Bostrichus capuchus, Lyctus canal- culatus, Cryptocephalus b'slteatus, Lycaenu argiolus, Art~phi- dasis hirtaria, Lithocolletis acaciella, Neniatus hortensis. Cole- optera 3, Lepidoptera 3, Hymenoptera 1.
The insects here damaging P. strotus (and P. rigia) are Coleoptera 41, Hymenoptera 7, Hemiptera 15, Lepidoptera 3, Termes 1 : It. pseudacacia, Coleoptera 4, Lepidoptera 7, Hemiptera 2, Diptera 2. Not one of them is identical with the European enemies.
H. A. Hagen.
Coleoptera of the White Mountains.
In July 1877, Mr. W. Schaus, Jr. and I collected on and around Mt. Washington, 3. H.
Our stay was necessarily
very short and some of the days were rainy. The time
was devoted to a thorough search for Coleoptera,, in special lo- calities, and resulted in obtaining so many species not, yet catalogued as from this region, that it seemed worth while to present a list of them to the readers of PSYCHE. The following list includes species not mentioned in Austin's Catalogue of the Coleoptera of Mt. Washington (see Bibl. Rec., no. 175) with a few (marked with an asterisk), which, though found in that list, are interesting as coming from a new point. The height above the sea level is given '-1 metres, either in connection with the list of abbre~ ifitions for localities, or against the locality in the list of species.




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