OF WASHINGTON. 239 



A list of the particularly infested plants, furnished by Mr. 

 Dewey of the Botanical Division, was given. A description of 

 the insect, which is a new species and will require a new genus 

 for its reception, was given, and figures of all stages were ex 

 hibited. Various means for the control of this pest were given. * 



Prof. Riley gave some additional notes on Panchlora viridis, 

 in which he referred to the receipt of two additional specimens, 

 one from Gustave Gutenberg of Pittsburg, and the other 

 from Carl Gissler of Brooklyn. The first of these shortly after 

 capture gave birth to a number of living young and afterwards 

 extruded an imperfect egg-cluster, including a number of un- 

 hatched eggs ; and the other on dissection was found to con 

 tain a perfect egg-cluster with the young nearly mature and 

 ready to emerge. 



This egg-cluster, which differs widely from that of other 

 roaches, was described and a figure of it exhibited. 



Prof. Riley described the modification of the abdomen in 

 Panchlora which afforded the space necessary for the escape and 

 pre-natal development of the young within the abdomen. 



The enveloping egg-sac of other roaches was in this species 

 reduced to a scarcely -discernible pellicle which did not cover 

 the eggs entire, but was limited to the inner or concave half, 

 of the egg-mass, f 



NOVEMBER 5TH, 1891. 



President Marx in the chair. Fifteen members present. 



Messrs. Theodore Gill and C. W. Stiles were elected active 

 members of the Society. Rev. C. J. S. Bethune, of Port Hope, 

 Canada, and Prof. H. A. Morgan, of Baton Rouge, La., were 

 elected corresponding members. 



Under exhibition of specimens and short notes, Mr. Schwarz 

 exhibited some fine and complete examples of the galleries 

 made by Hylesinus seticeus in the bark of Adzes menziesii, from 

 the Wahsatch Range of Utah. These galleries closely resemble 

 those made by the species of Scolytus. 



Dr. Marx exhibited two remarkable spiders occurring in our 



* Insect Life, Vol. IV, Nos. 3 and 4. 



t Published in detail in Insect Life, Vol. IV, Nos. 3 and 4. 



