

ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



Academy of natural sciences, Philadelphia. 



Vol. XII. MARCH, 1901. No. 3. 



CONTENTS: 



Calvert— On Gomphus fraternus, ex- Robertson — Synonymy of Prosopis 77 



turnus and crassus (Odonata) 65 Foster— Results of Breeding Moths of 



Cockerell— A New Andrena from Cali- the Genus Haploa Hubner 79 



fornia 74 Editorial 84 



Wenzel — The Coleoptera found in a Entomological Literature S5 



Bam 75 Notes and News Sg 



Davis — Cecropia Cocoons 76 • Doings ofSocieties 92 



On Gomphus fraternus, externus and crassus 



(Order Odonata). 



By Philip P. Calvert. 



Some time ago, when some western Gomphi were submitted 

 tome for identification, I had considerable diflficulty in deter- 

 mining them. Correspondence with Messrs. WiUiamson, Hine, 

 Adams and Weith ensued, resulting in generous offers on their 

 part to place their material related to G. fraternics Say, at nxy 

 disposition for study. I thankfully accepted, since the chief 

 obstacle, in ;//_)' wa\- at least, was lack of material. As the out- 

 come of careful comparative study, I have the following notes 

 to present, which, I am led to think, may be of use to others 

 beside m^-self. Of the three closely related species, whose 

 names stand at the head of this article, I have examined the 

 following individuals : 



G. frater?ius ^2cy, ig I ij 9 ; G. externus Selys, 4^69; 

 G. crassus Hagen, 20 S 3 9 • 



The differences between these three species are as follows ; 

 they are arranged, approximately, in order from the least 

 variable to the more variable. 



