Vol. XXIV] ENTOMOLOGICAL NEWS 265 



founds a species on two or more specimens it is incumbent on 

 him, in describing the species, to examine and take into con- 

 sideration all these specimens and he has no logical right to 

 designate one specified specimen as type. They are all types 

 and have all the same claim to be considered as such, unless 

 the describer has expressly stated that certain specimens on 

 such and such ground are less typical or that one sex is doubt- 

 fully conspecific with the other. If a subsequent author sub- 

 divides the species into two or more species, he is at liberty to 

 choose any of the original specimens as types both for the 

 old species and for the new ones, even if the first describer, 

 for commercial or other reasons, has marked only one speci- 

 men as type. I have thought it necessary to put in this as 

 an apology for refusing to fix one-specimen types, some of 

 my correspondents having urged me to discriminate between 

 "type" and "cotypes," a discrimination which seems to me to 

 be unscientific and liable to promote careless describing. Co- 

 type can in my opinion be used only as a synonym of type, 

 indicating that a species has been founded on more than one 

 specimen. 



Castolus ferox Banks. 



Mr. Banks kindly gave me specimens of his Zelus fero.r 

 from Arizona. It is no Zelus at all, but belongs to the genus 

 Castolus Stal, being the first species of this genus found 

 north of Mexico. 



Fam. HENICOCEPHALIDAE. 

 Henicocephalus biceps Say. 



There can be no doubt that the insect described by Say under 

 the name Redui'ins biceps is the same as Hyineuodectes ciilicis 

 Uhl., described 60 years later. Say's species does not seem 

 to have been mentioned in the literature since it was describ- 

 ed and is omitted even in all the catalogues (Lethierry & 

 Severin, Uhler, Banks). I have before me only Say's origi- 

 nal pamphlet printed in New-Harmony, Ind. (of which but 

 two copies are said to exist in the United States and scarcely 

 more in Europe) and I do not know if it be omitted also in 



