Vol. XXlx] ENTOMOLOGICAL NEWS 307 



through the courtesy of Mr. H. G. Champion, and his father, 

 G. C. Champion, differ from it by being generally larger, 2 mm. 

 or over in length, evidently shining and submetallic, with pro- 

 thorax but little narrower in front, the elytra with finely punc- 

 tate striae, and by having the margins of both prothorax and 

 elytra finely serrate. 



EURYSTETHIDAE ( AEGIALITIDAE) . 



Key for the Determination of the Species of the genus Eurystethes 



Seidl. (Aegialites Mann.). 

 Elytra evidently striate. 



Head and thorax not shining and with but few and inconspicuous 

 punctures. 



Elytra deeply striate and without distinct punctures. 

 Head and thorax alutaceous, elytra shining, eyes not promi- 

 nent, longitudinal thoracic line well defined. Length 3-4 

 mm. (Aleutian Is., S. E. Alaska. Queen Charlotte Is.) 



californicus Mann. 



Elytra shallowy striate and with small but distinct punctures. 

 Head and thorax coriaceous, elytra rugose, eyes very promi- 

 nent, longitudinal thoracic line prominent. Length 3-3.8 

 mm. (Robben Is. off coast of Sakhalin Is.) 



stejnegeri Linell. 



Head, thorax, and elytra shining and with numerous well defined 

 punctures, eyes quite prominent, thoracic line rarely evident. 

 Length 2-2.5 mm. (Mendocino Co. and The Farallone Is., Cal.) 



fitchsii Horn. 



4 The family and generic names as here used are in accordance with 

 the latest rulings on nomenclature. In 1845, Col. Motschulsky de- 

 scribed Elosoma persica and . (?) californica, in the Bull. Soc. Imp. 

 Nat. Mosc. Vol. 18, p. 33. In 1853, Count von Mannerheim described 

 Aegialites debilis in the Bull. Mosc. Vol. 26, p. 180. This last was later 

 found to be the same as B. ? californica Mots, and so had to be reduced 

 to synonymy but because of the belief that persica and colifornica were 

 not congeneric, the generic name of Aegialites was allowed to stand 

 for californicus. Later rulings on nomenclature however made this 

 invalid seeing that it had been previously employed to designate a genus 

 of birds, so to remedy the defect. Seidlitz in the Deutsch. Ent. Zeit. 

 for !Qi6, p. 127, proposed the name Eurystethes for the genus and 

 Eurystethidae for the family. Therefore if we believe with him that 

 persica and californica are not of the same genus and family, which I 

 most decidedly do, we have no alternative but to accept the names 

 proposed by Seidlitz. 



