Vol. xxii] ENTOMOLOGICAL NEWS 95 
Mr. Daecke said he had found Cicindela rufiventris Dej. on 
the top of a mountain near Harrisburg; was surprised to find 
it there as it is found in just the opposite conditions in New 
Jersey. 
Mr. Harbeck said since finding at Trenton, N. J., the sawfly 
with “four antennae” recorded at the October, 1909, meeting, 
he had found another at the same place and one at Mana- 
hawkin ; he questioned whether they were all freaks or whether 
there was a genus with this characteristic.* This led to a 
general discussion on the subject of freaks including mammals, 
plants and insects. Adjourned to the annex. 
Geo. M. GREENE, Sec’y. 
AMERICAN SOCIETY OF ZOOLOGISTS. 
At the eighth annual meeting of the Eastern Branch, held 
at Cornell University, Ithaca, New York, December 28-30, 
1910, the following papers of an entomological character were 
read: Dr. N. M. Stevens (Bryn Mawr College) Hetero- 
chromosomes in Mosquitos. Contrary to the previous exper- 
ience of the speaker that when heterochromosomes were found 
in one member of a genus or family of Coleoptera, Diptera 
or Hemiptera, they are also to be found in other members of 
the same group, she found heterochromosomes clearly differ- 
entiated in Anopheles but not differentiated in Culex and 
Theobaldia; this non-differentiation was used as an argument 
against the idea that heterochromosomes are sex-determinants. 
Prof. T. H. Montgomery, Jr. (University of Pennsylvania), 
Origin and significance of Mitochondria. This granular con- 
stituent of cells was studied in living sperm cells of Euschistus 
(Hemipteron) and was considered to be due not toan extrusidn 
of chromatin from the nucleus but probably to a chemical in- 
teraction between nuclear and cytoplasmic material; it was 
suggested that cells receiving much mitochondria may become 
somatic cells, those receiving little mitochondria may become 
* Mr. E. T. Cresson stated, without having seen these specimens, that 
they were perhaps males of Lophyrus.—Ebs. 
