30 ENTOMOLOGICAL SOCIETY 
ing points : the changes taking place in the insect after immer- 
sion in alcohol ; the mode of issuing of the imago from the pupa 
and the resemblance of this act to the same in the Acridiidce ; on 
the sexual differences in the pupa. 
Mr. Heidemann exhibited colored sketches illustrating two 
stages of the issuing of the Cicada from the pupa. 
Mr. Schwarz remarked on a species of Scolytus* bred from 
Hickory twigs by Dr. Hamilton of Allegheny City, Pa., and 
referred by him, in a recent number of the Canadian Entomolo- 
gist, to S. rugulosns. This species from Hickory is undoubtedly 
different from the last-named species and apparently undescribed. 
Dr. Riley stated that he had bred Walshia amorphella from 
roots of Loco Weed, the species having previously been known 
as a gall-maker on Amorpha fruticosa. In this connection he 
also stated in reference to another gall-maker on Solidago, (which 
he had illustrated with the above-named species in his zd Report 
on the Insects of Missouri) , that his recent researches led him to 
doubt the synonymy of Euryptychia saligneana Clemens with 
Pcedisca scudderiana Clem. 
Dr. Riley further stated that Sphida Grote had no existence in 
nature, Sphida obliquata Gr. & R. being synonymous with 
Arzama densa Walk. He had examined the type in the British 
Museum . 
NOVEMBER 18, 1885. 
Ten persons present. President Riley in the chair. 
An invitation from the Chemical Society of Washington to 
attend the Annual Address of the President was read and ac- 
cepted. 
Mr. Lugger exhibited photographs of the different stages of 
Ccenia dimidiata Fabr., and gave an account of its larval history 
and habits. The following is an abstract of his paper : 
In May} 1883, he found the same larva as figured by Packard, {Guide to 
the Study of But., p. 466, fig. 433), and which had never been bred before. 
He found no less than 214 specimens clustered together at the" base of a 
willow tree, but slightly covered with dead leaves and very little moss. 
The larvae closely resemble the cast off skins of the common Oniscus found 
in similar localities. Scattered between the leaves were numerous speci- 
