Vol. xxii] ENTOMOLOGICAL NEWS 95 



Mr. Daecke said he had found Cicindela mfiventris 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 CBryn 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 Cule.r 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 Enschistits 

 (Hemipterqn) and was considered to be due not to an extrusion 

 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. Ens. 



