1886.} Zo0logy. i ; 977 
attempts was caught, but was badly spoiled and thrown away, 
which, by mere chance, fell on the ground with its wings extend- 
ed. A few minutes later it was noticed that the insects that flew 
by were sensibly attracted by this dead insect, which they endeav- 
ored to make known by their occasionally alighting directly 
upon the dead body of their fellow. 
= hus noticing the decoying effects of the insect, a number after 
being chloroformed were set apart as decoys pinned upon theends 
of twigs which were stuck in the ground, The effect was 
quite remarkable ; hardly a single butterfly would pass the sight 
without alighting among them, and-became an easy prey to the 
net. In this way a large number of beautiful specimens were 
taken which would otherwise have been quite difficult to capture. 
—TFoseph L. Hancock. 
_ ENTomotocicar Notes —At the Junemeeting of the Entomolog- 
ical Society of Washington, Mr. Lugger mentioned the fact that 
rounds, were this year uniformly sterile. He attributed this 
phenomenon to the inclement weather during the flowering sea- 
son, which prevented bees from visiting the flowers. He also 
farther described the mode of fertilization of the common lady’s- 
Slipper / Cypripedium acaule) by a species of Andrena. Mr. 
Lugger also remarked that a few specimens of the Euro- 
Pean Aphodius erraticus were first found by him in 1878 
near Baltimore. Since that time the species has spread 
and is now so common that it has actually replaced the 
formerly common Aphodius fimetarius———Mr. J. B. Smith de- 
Scribes and figures, in Entomologia Americana (No. 4), the scent- 
Organs of Leucarctia acrea and Pyrrarctia isabella, which are thrust 
Cut between the 7th and 8th segments of the abdomen of those 
moths, Similar organs have been observed by Morrison in 
Agr ous plecta and Euplexia lucipara, and Dr. Riley has observed 
“vem in Aletia xylina. 
ZOOLOGY. 
CLASSIFICATION or SponcEs.—Professor W, J. Sollas (Scientif. 
T Proc. Roy. Dublin Socy., v. 1886) thus arranges the sponges: 
Class I. Plethospongiz. 
ass I. Hexactinellida. 
Sub-class II. Desmospongize. 
Sub-class ITI, Myxospongie. 
Class II. Calcispongiz. 
The great majority of the sponges, as will be seen, belong to 
the Desmospongize. The Myxospongiz are not regarded as a 
degenerate group. Sollas resents (Zool. Anzeiger, 1886) the 
_ Mputation of Heider that his peculiar gastrulas of sponges were 
= Merely shriveled blastule. 
