28 ENTOMOLOGICAL SOCIETY 
vated higher mountains. In North America the corresponding 
faunas and floras representing the more original state of things 
have not yet become separated. The fauna of the Alleghanies 
nowhere represents an alpine character, that of the White Moun- 
tains in New Hampshire being essentially arctic in its character. 
Mr. Howard made a statement in regard to the parasites of 
Thyridopteryx ephemerccformis. He had found a Chalcid 
larva feeding within the bags of this species upon the larva of the 
Ichneumon id parasite, Hemiteles thyridopterygis, and surmised 
that the Chalcid would prove to be the Pteromalus often bred 
from Thyridopteryx bags. This observation shows that one of 
the so-called parasites of the Bag-worm is secondary, and so in- 
jurious rather than beneficial. The speaker generalized on the 
distinction so difficult to draw between primary and secondary para- 
sites and urged the importance of close observation and extend- 
ing rearing of parasites in order to form a basis for a separation 
between the injurious and beneficial species. 
Dr. Marx spoke on the Arachnida collected by Dr. L. M. 
Turner in northern Labrador. As was to be expected in a coun- 
try almost destitute of trees, the species living under stones and 
moss were much more represented than the web-constructing 
species living among trees. The best represented family is that 
of the Lycosidce, next the Drassidce, and then the Thomisoidce. 
Mr. Schwarz exhibited specimens of Eutyphlus and Nicotheus 
of the Coleopterous family Pselaphidas, the latter genus being 
recently established by Lieutenant Casey. After a close examin- 
ation of the two genera, he has no doubt that Nicotheus is 
synonymous with Eutyphlus, and that even the specific difference 
of the two insects may be doubted, the only difference being the 
well developed eyes in Nicotheus. 
MAY 6, 1885. 
Six persons present. Dr. Barnard in the chair. 
Mr. Stewart inquired as to the best places and best methods for 
collecting Neuroptera, and Dr. Barnard, Mr. Howard and Mr. 
Schwarz gave their experience in regard to several families and 
genera of that Order. 
