44 ENTOMOLOGICAL SOCIETY 



The peculiar stridulation indulged in on the wing was noticed 

 to be dispensed with when the sun became low, individuals at 

 that time flying silently, while the stridulation is invariably 

 exhibited in flight in the strong heat of the sun. Not rare. 

 Seen as late as October 4. 



A pair of Chloealtis conspersa, Harris, was taken in coitu Sep 

 tember 7, the first specimens being seen September 6. Un 

 common. 



Tettigidea polymorpha, Scudd., Tettix triangularis , Scudd., 

 and granulatus, Scudd., are frequently found hibernating as 

 images under logs, sticks, stones, bark, and even found in 

 those situations in the spring and late in summer. 



Mr. Mann queried if dates of first appearance might not 

 have some relations to the dates of going out into the field. 

 Mr. Townsend showed, however, that in going to and from 

 work he had had daily opportunity to make observations. Mr. 

 Schwarz said that any date \vas important and valuable as 

 furnishing a basis for future observations. 



APRIL 3RD, 1890. 



Nine persons present. President Marx in the chair. 



A letter of resignation from Dr. R. W. Shufeldt was read, 

 and the resignation was accepted. 



Mr. B. E. Fernow was elected an active member of the Society. 



Dr. Fox read a paper on the genus Ceratinella {Erigone}. 

 He showed drawings and specimens of all the known Ameri 

 can forms except C. brunnea* Km. and C. pygmcea Em., and 

 also described the following new species : 



NEW NORTH AMERICAN SPECIES OF THE GENUS 

 ERIGONE. 



BY DR. WM. H. Fox. 



Brigone (Ceratinella) alba, n. sp. 



$ Closely resembling C. fissiceps, but distinguishable by its lighter 

 color and very small palpus. Length, 1.5 mm. 



* I have since examined a specimen of C. brunnea, thus leaving C. 

 pygmcea the only one unknown to me. WM. H. Fox. 



