86 The American Naturalist. [January, 
enough to the waters edge to insure continued dampness, and there 
construct an oval cell of earth, without any admixture of silk so far as 
Ican find. These cells are not simple excavations of earth beneath the 
stone but are built upon it like the cells of some of our mudwasps, and 
are not very unlike them in shape.” 
Hermann August Hagen.—This veteran entomologist, for many 
years Professor of entomology at Harvard College, died at his home in 
Cambridge, Nov 9 last. Born in Königsberg, Prussia, May 30, 1817, 
he graduated in medicine in 1840, and was a practicing physician in — 
Kénigsburg until 1867. He then, at the invitation of the elder Agas- — 
siz, came to Cambridge to become Curator of the entomological — 
department of the Museum of Comparative Zoology, æ position which 
he retained until his death, though because of ill health he has not 
been actively at work for several years. Dr. Hagen has long been 
known as an authority in entomology, especially on the Neuroptera 
and their allies; and by his work at the Museum has greatly 
helped the development of the science in America. 
Entomological Notes.—Professor L. M. Underwood has edited 
and the U. S. National Museum has published (Bull. 46) the papers — 
on North American Myriopoda written by the late C. H. Bollman. — 
The Bulletin covers more than 200 pages and must form the basis of — 
future work on this neglected group. ; 
At the meeting of the London Entomological Society, Oct. 4, speci- 
mens of Lepidoptera which had been exposed in the pupa stage to low 
temperatures were exhibited by Mr. F. Merrifield. “ Vanessa poly- 
chloros was much darkened, especially toward the hinder margin, by & 
low temperature. Vanessa c-album showed effects on both sides, & 
pecially in the female; they were striking on the under-side. Some 
Vanessas showed the gradual disintegration, by exposure to a low 
temperature, of the ocellus on the fore wing, which in extreme speci- 
mens ceased to be an ocellus.” 
Various species of Vespa have been so abundant the past season in 
Great Britian that accounts of the “Plague of Wasps” have been — 
oe 3 eee, See ee to recent - 
occasionally published. Their 
favorable meteorological conditions. 
The U.S. National Museum has published in the Proceedings (Ne : 
950) “A Descriptive Catalogue of the Harvest-spiders (Phalangi i. a 
of Ohio” by Clarence M. Weed. Fifteen species or subspecies are in- 
cluded in the list. — 
Berge te yet ee i ee See O Ca 
