416 



Siorer^s Description of a new Species 



favosa^ Illig. scuteJlariSy liditr. yfascidia^ Latr., interriiptay 

 Latr. and other species as given in Humboldt's Zoological 

 Observations ; and even should it be referred to that genus 

 notwithstanding its denticulated mandibles^ I have endea- 

 vored to draw out such characters as may distinguish it 

 from them. Latreille, however, says of Melipona 

 " Mandibles sans dentelures apparentes'' which entirely 

 excludes this species, although it agrees in habit. 



ART. XVIIL— DESCRIPTION OF A NEW SPECIES OF THE 

 GENUS HYDRARGYRA; W^ITH SOME ADDITIONS TO 

 THE CATALOGUE OF THE FISHES OF MASSACHU- 

 SETTS IN HITCHCOCK'S REPORT. By D. HtrMPHRiTYS 

 Stoker. Read June 4th, 1836. 



Although the genus CrpRiNus of Linnaeus was dividr 

 ed by Cuvierj in his Regne Animale, into no less than 

 seventeen distinct genera^ Le Sueur found it necessary 

 to add another — or rather to modify the genus Hydrar- 

 GTRA of La Cepede, which Cuvier included in his genus 

 P(EciLiA, in order to admit those well known fishes^ called 

 minnows^ or mud fishes^ so often seen about fresh water 

 streams, and the small ponds in salt marshes. 



The Hydrargyra of Le Sueur is a well characterized 



w 



genus. The only descriptions, which have been publish- 

 ed of these fishes, are contained in the Journal of the 

 Academy of Natural Sciences at Philadelphia. The 

 specimen, upon which a report was requested of me, at 



Society 



Four 



species have been described by Le Sueur — and each has 



